Latest Pipes, Pumps And Valves Africa Sep-Oct 2023

ENDORSED BY SAPMA, SAPSDA, SAVAMA AND VAMCOSA

SEP/OCT 2023

Vacuum Pumps & Lobe blowers

Different types of pumps

|

What is flow control valve?

GODWIN BD150 ROBUST DESIGNED TO SERVE ALL

YOUR DEWATERING NEEDS

POWERFUL PERFORMANCE

Interchangeable application-specific impellers

BD150T BD150T

in it

Versatile solution for your every need

Increased pump effi ciency means greater performance while consuming less power and fuel. The improved hydraulic design also means less NPSHr and reduced chance of wear due to cavitation.

BD150C BD150C

Market-leading configuration and component options: 4 Diesel and Electric drive options 4 Open skid base 4 4-wheel trolley

Find out how we can solve water together.

CONTENT COVER STORY New generation liquid ring vacuum pumps

4

BEARINGS How to choose the right lubricant for heat-intensive applications

6

Cutting-edge manufacturing capabilities enable production of diverse vane sizes

8

PUMPS Types of solar pumps

9

The role of cutter fans in pump agitation

10

Right pumps will mitigate mines’ rainy season risks

12

Versatility for the most demanding emerging market jobs: Godwin BD150 self-priming Dri-Prime® pumps

13

Different types of pumps

14

Failure is not an option for the fire protection industry

16

Verder expands its footprint to extend service to Namibia and Kenya

17

Exploring the efficiency and reliability of air-operated double diaphragm pumps

18

Streamlining pump selection: the power of the Atlas Copco algorithms

20

Jetting equipment options for mining operations

22

Keeping mill circuit pumps running, the key to efficient operations

24

Tsurumi Pump’s innovative ground drainage pumps offer a smart solution for addressing low-level dewatering needs

26

VALVES What is a flow control valve?

28

One solution for butterfly, ball/plug and globe valves

30

The power of the duckbill

32

Gas Control Valve regulates mass flows in fuel cell systems

34

WATER How dosing ratios affect the cost of chemical use over time

36

INDUSTRY NEWS The Big 6 level measurement technologies, where to use them and why

38

As part of the dynamic EMVAfrica group, EnergyValves is positioned as more than a supplier of valves, we offer complete solutions

41

BUYERS GUIDE

43

On the cover Air & Vacuum Technologies +27 (0) 11 318 3241/2/3/4 info@vactech.co.za www.vactech.co.za

Pipes, Pumps & Valves Africa Managing Editor: Surita Marx Tel: +27 (0) 87 700 9834 Cell: +27 (0) 83 281 5761 Email: info@pumpsandvalves.co.za Web: www.pumpsandvalves.co.za Sales: Peter Rametsi Email: sales@pumpsandvalves.co.za Production Manager: Xane Roestroff

Advertisers

Air & Vacuum Technologies Bray C.R.I. Fluid Systems Cyclone Industries EMV Africa Golf Day 2023 Industrial Valve Summit Integrated Pump Technologies Invincible Valves IPR KSB Sizabantu Stelkon Vac-Cent Vega Controls Verder Pumps Vesconite Bearings Xylem Zenzele Valves

OFC 9 19 23 25 42 IBC 13 7 OBC 27 33 37 35 11 17 45 IFC 31

Disclaimer: Opinions in this Publication are those of the authors and do not necessarily reflect those of this publication, its editorial board, its editor or its Publishers SAPMA or VAMCOSA The

mention of specific products in articles and advertisements does not imply that they are endorsed or recommended by this Publication or its publishers in preference to others of a similar nature, which are not mentioned or advertised. Reliance on any information contained in this journal is at your own risk. While every effort is made to ensure the accuracy of editorial board makes no representations or warranties, express or implied, as to the correctness or suitability contained and/or the products advertised in this publication. The Publisher shall not be liable for any damages or loss, howsoever arising, incurred by readers of this publication or any other person/s. The Publisher disclaims all responsibility and liability for any damages, includes pure economic loss and any consequential damages, resulting from the use of services or products advertised in this publication. Readers of this publication indemnify and hold harmless the publisher, its officers, employees, and servants for any demand action, application or other proceedings made by any third party and arising out or in connection with the use of any services and/or products or the reliance on any information contained in this publication.

Pipes, Pumps and Valves Africa - Sep/Oct 2023

3

COVER STORY

New generation liquid ring vacuum pumps A range of single stage, variport liquid ring vacuum pumps is ushering in a fresh era in design performance and reliability.

TRVX Pompetravaini’s technology offers tangible benefits for food and beverage manufacturers. The new hydraulic profile allows performance increases of more than 10 per cent over traditional liquid ring designs. Increases in efficiency and operational cost savings can now be achieved over the entire pump life.

Advantages when compared to traditional liquid ring vacuum pumps: • Pump weight is 30 per cent less on average compared to traditional designs • Units are compact and dimension and volume is 40 per cent less than traditional designs • Features single and direct service liquid connections • Up to 50 per cent less service liquid usage reduction • Central body impeller housing with integrated suction and discharge manifolds.

This feature reduces pump components and increases robustness • Suction, discharge port plates and impeller in stainless steel allows greater reliability.

• Standard ISO 3069/DIN 24960 mechanical seals are easily obtainable. This reduces component stocking • Mechanical seals can be replaced without disassembly of the pump reducing downtime • Features external precision regulation of the impeller shaft, resulting in easy maintenance, performance optimisation, assembly time and cost • Length between bearing supports is 25 per cent less than traditional pump designs. This results in a reduction of eventual vibration and shaft deflection • Connections are universally flanged to meet both DIN-EN and ANSI standards.

The TRVX is a true leader in its own class with capacities up to 2 000m³/h with a maximum vacuum of 33mbar abs.

Air & Vacuum Technologies | info@vactech.co.za

Aeration of Wastewater by means of a blower & air diffusors What Wastewater Aeration Does By adding air to wastewater in a treatment plant it assists the aerobic microorganisms in the consumption of pollutants. Wastewater aeration is a vital part of most every biological treatment system. A well designed and operated wastewater aeration system will accomplish two main jobs: • Adds air to the wastewater thus increasing the dissolved oxygen (DO) levels • Mixes the wastewater Adding Air to Wastewater The first job of wastewater aeration is adding air to the wastewater. In a secondary biological treatment process, aerobic microorganisms consume the organic pollutants in the wastewater. These microorganisms require adequate dissolved oxygen or “DO” to thrive. Without sufficient oxygen, microorganisms are not able to consume the incoming organic pollutants in a reasonable time. In order to maintain DO levels, an aeration system is a must.

Mixing the Wastewater The second job of wastewater aeration is mixing the wastewater. Proper mixing keeps solids in suspension thus avoiding a build-up of sludge. Mixing also ensures that there are no anaerobic (without air) zones in the wastewater. A common problem, especially with lagoons, is that there is less oxygen present on the bottom. Mixing makes sure all the water and microorganisms come into contact with oxygen.

How does Wastewater Aeration Work? Sub-Surface Aeration A sub-surface aeration system provides oxygen to microorganisms by injecting air into the wastewater. Blowers (side channel blowers or Roots / rotary lobe type blowers) or low-pressure screw compressors or turbo blowers for the larger installations) the air which is delivered through airlines to diffusers installed on the bottom of the tank or lagoon. The diffusers are installed in a pattern on the bottom of the tank or lagoon for uniform coverage. The diffusers have tiny holes that create bubbles that come into contact with the water. Diffusers come in two basic types: fine bubble and course bubble.

Fine Bubble Diffusers Fine bubble diffusers typically have thousands of tiny holes and produce the smallest bubbles. The smaller bubbles provide the maximum surface area for contact with the wastewater. They also rise to the surface at a slower rate which provides for a longer contact time. These two factors make fine bubble diffusers the best choice for what is

COVER STORY called “Oxygen Transfer Efficiency”. Oxygen transfer efficiency is the amount of air absorbed by the wastewater as a percentage of the amount of air produced by the aeration system.

Course Bubble Diffusers Course bubble diffusers typically have a few larger holes that produce larger bubbles. These larger bubbles travel faster to the surface than the fine bubbles.

This aspect creates more turbulence and mixing in the wastewater. Course bubble diffusers are an excellent choice in situations where mixing is most important. It should be noted that course bubble diffusers can require twice as much air to operate as fine bubble diffusers.

Wastewater Aeration as Part of a Treatment Process Wastewater aeration is typically used during the secondary treatment process. This process is most often an activated sludge process.

Aeration in an activated sludge process is accomplished by pumping air into the tank or lagoon. Proper aeration promotes the growth of microorganisms or microbes in the wastewater. The microbes feed on the organic pollutants and form flocs which can easily settle out. The flocs are allowed to settle out in a separate settling tank or lagoon. The flocs of bacteria that settle and accumulate on the bottom of the tank or lagoon form activated sludge. The activated sludge can then be recirculated back to the aeration basin or lagoon to increase the rate of consumption of pollutants.

Wastewater aeration is also used in tanks and lagoons used for storage. Examples of these storage tanks and lagoons would be ones used as sludge holding and flow equalization.

In these portions of a wastewater treatment system (tank or lagoon) it is important to maintain the living microorganisms. If the microorganisms begin to die, the wastewater will become septic, and odour will start to be an issue. Air & Vacuum Technologies (Pty) Ltd can assist you with all your needs when it comes to most of the equipment required on a wastewater treatment plant. We are the direct importer of the full Robuschi range of Rotary lobe, screw compressors, turbo blowers & centrifugal pumps, all commonly found on said plants. We offer peristaltic pumps, doing pumps & side channel blowers. We are the SOLE distributor for the WTE range of air diffusers.

+27 (0) 11 318 3241/2/3/4 | www.vactech.co.za

How to choose the right lubricant for heat-intensive applications

BEARINGS

Heat-intensive processes can put immense strain on equipment, which is why using the correct lubrication is essential to prevent component failure. Selecting the right product can be daunting, but Colin Ford, Managing Director at Lubrication Engineers (LE) South Africa says there are some helpful guidelines that maintenance teams can use when selecting the correct lubrication for their equipment.

One of the most important is the recommended maximum useful lifetime for a grease in high temperature bearings.

“This can depend on many factors, from temperature to the size and speed of bearing, the amount of oxygen available to the grease in the bearing, the load on the bearing and the degree of external contamination,” says Ford. A reputable product should come with a guideline range for its use.

For example, field testing has shown that the maximum useful lifetime guidelines for the Almasol High Temperature Lubricant (1250) that LE supplies are 10 000 hours at 93°C, 100 hours 149°C and between one and four hours at 204°C. “Lubrication interval recommendations for LE’s 1250 Almasol High Temperature Lubricant are much lower than the maximum useful lifetimes,” Ford says. “This is because normal bearing relubrication practices replenish only a relatively small portion of the grease and the bulk of the grease in the bearing, at any given time period, has been there for a much longer time than the lubrication interval.”

Viscosity In addition, it’s important to consider the thickener of a grease. Bearings operating in or near heat-generating equipment are exposed to temperatures that cause general greases to melt and run, leaving critical bearing surfaces unprotected, so having an effective thickener can protect equipment.

LE developed the 1250 Almasol High Temperature

6

Pipes, Pumps and Valves Africa - Sep/Oct 2023

Lubricant with a clay thickener system that has “one of the highest temperature capabilities of any grease thickener technology currently available in the industry,” adds Ford.

It uses a base oil with a heavy viscosity and high flashpoint, and it has a high natural viscosity index. “The high temperature thickener has a high dropping point, making it a good choice for heat-intensive applications,” says Ford.

Assessing the application Assessing the temperature needs of a particular application is also helpful when selecting a lubrication solution. The Almasol in LE’s 1250 Almasol High Temperature Lubricant is a solid wear-reducing additive in the product that is able to withstand extremely heavy loads, chemical attack and temperatures of up to 1,038°C. This makes the lubricant ideal for applications such as asphalt plants, brick/ceramic kilns, exhaust fans, kiln car bearings, lime kilns, oven conveyors, pellet mills, plastics and soot blowers.

Lubrication products used in these applications are subjected to much harsher conditions or higher temperatures than others. By choosing products specifically designed for challenging circumstances, you can protect your equipment, improve performance, and save on maintenance and repair costs.

Lubrication Engineers, +27 (0) 11 464 1735, gavin@lubricationengineers.co.za, www.lubricationengineers.co.za

Cutting-edge manufacturing capabilities enable production of diverse vane sizes BEARINGS

Vesconite Bearings has recently produced what is believed to be both the smallest and largest vanes in its history.

This achievement underscores Vesconite Bearings’ commitment to the vital engineering part that is used in air motors, vacuum pumps and concrete vibrators, ensuring their efficiency, reliability and performance. In June, Vesconite Bearings successfully crafted the tiniest vanes to date, measuring a mere 1.3 mm in thickness, 6.3 mm in width, and 30 mm in length. These precisionengineered vanes were specifically produced for testing by an air motor manufacturer based in Italy. Each air motor incorporates five of these vanes, showcasing the precision and craftsmanship for which Vesconite Bearings is known. The small vanes are made from Vesconite Hilube and Vesconite Superlube wear materials, both of which boast low coefficients of friction. Particularly noteworthy, Vesconite Superlube stands out as an ultra-low-friction wear material with friction levels even lower than virgin polytetrafluoroethylene (PTFE).

Testing is underway to determine the optimal wear material for this application. Meanwhile, Vesconite Bearings has also achieved production success in the opposite direction, producing what are possibly the largest vanes it has produced to date. Measuring an impressive 510 mm in length, 20 mm in thickness, and 150 mm in width, pairs of these sizable vanes are destined for trial in vacuum pumps by a South African vacuum pump repairer and supplier. Crafted from Vesconite Superlube, Hitemp 160, and Hitemp 150 wear materials, these vanes offer different characteristics, including an ultra-low coefficient of friction in the case of Vesconite Superlube, incredible chemical resistance in the case of Hitemp 160; and excellent abrasion-resistant properties in the case of Hitemp 150.The coming months will see 8

Pipes, Pumps and Valves Africa - Sep/Oct 2023

comprehensive testing of each material – Vesconite Superlube in September, Hitemp 160 in October, and Hitemp 150 in November – to determine the most suitable wear material for this application.Vesconite Bearings senior sales consultant Phillip de Villiers and Vesconite Bearings engineer Jandri Ueckermann describe how the manufacturing process for these vanes showcases Vesconite Bearings’ dedication to precision engineering.

For the small 1.3 mm thick vanes, the manufacturing procedure involved the challenges of machining thin plates to the desired thickness, and then profiling to shape. “We are excited to have these large and small reference case studies that demonstrate our vane production capabilities,” says Vesconite Bearings senior sales consultant Phillip de Villiers.

“Our ability to manufacture both the smallest and largest vanes, along with our expertise in developing wear materials for distinct operational conditions, reflects our commitment to providing tailored solutions for our clients,” he notes.“Vesconite Bearings continues to push the boundaries of engineering and innovation, reaffirming its position as an industry leader in bearing and wear solutions,” adds Ueckermann.

“With a proud history of addressing diverse needs and a forward-looking approach, the company remains at the forefront of delivering cutting-edge solutions to a global clientele,” she says.

Vesconite Bearings, +27 (0) 11 616 1111, vesconite@vesconite.com, www.vesconite.com

Types of solar pumps Solar power, or energy created by the sun, can be harnessed in a number of ways, including through solar panels that convert the sun’s rays into electricity.

In the case of a solar pump, solar energy is converted into electricity and fed to a pump that circulates water. These types of units can be used in swimming pools, fountains and larger agricultural projects, and enables the customer to save on heft electricity bills to run their normal pumps

Solar pump components Lorentz-solar-pumpSolar pumps operate using three main components. Solar cells collect the sun's rays and convert them into usable electricity. These cells are usually covered in silicon or another semiconductor material that produces direct-current electricity. Wiring moves the electricity from the cells to the pump, and the pump does the work of moving the water. Some systems may also contain a battery, which is charged when the sun is shining for use when it's dark outside.

Solar pump considerations When installing a solar pump, keep a few things in mind.

Solar panels operate more efficiently when pointed in

PUMPS

Types of solar pumps There are two main types of solar pumps. Surface solar pumps sit above ground and move water through pipes.

These are handy for moving large quantities of water at a slow pace. Surface pumps are commonly found on farms or large irrigation systems where water needs to be moved from a lake or other body to fields or landscaping. There are also submersible solar water pumps. These units are installed underground, but the solar panels are connected above ground. Submersible pumps are used to move water from inside wells to the surface.

the right direction, at the right angle. The details will be specific to where in the world you install your solar panels.

Solar cells can be mounted on the ground or atop a pole or even on the roof of a building. Consider mounting solar collectors on polls to avoid damage from children or animals, and to keep the cells from being covered by snow.

Solar pumps vs. Wind pumps Both solar- and wind-powered pumps are commercially available, but solar pumps have some distinct advantages.

Solar-power systems collect energy even when it's cloudy outside, while wind systems rely on gusty conditions for peak efficiency. Solar-power systems also often cost less than wind systems, and are less expensive to maintain.

Solar systems are also more mobile than wind systems, which, in most cases, have to be mounted in a stationary position with a concrete base.

SuperPump Water Pumps (Pty) LTD, +27 (0) 12 335 8289, sales@superpump.co.za, www.superpump.co.za

HIGH PERFORMANCE

FLOW CONTROL SOLUTIONS Bray offers a complete portfolio of flow control solutions to handle your most challenging mining applications.

Learn more at BRAY.COM

Bray Controls Africa (Pty) Ltd Unit 11, ABC Business Park Mastiff Rd, Linbro Business Park Sandton 2090, South Africa Telephone: +27 10 007 3222

Pipes, Pumps and Valves Africa - Sep/Oct 2023

9

The role of cutter fans in pump agitation

PUMPS

The integration of innovative features during pump design has significantly enhanced performance and efficiency, with significant benefits for lowering total cost of ownership. One such component, the cutter fan, plays a crucial role in achieving effective agitation and solids handling.

Ruaan Venter, Business Development Manager at IPR the official distributor of Toyo heavy duty slurry pumps in southern Africa, sheds light on the functions and applications of these components, offering valuable insights into their importance in pump systems.

Differentiating Between Cutter Fans and Other Components. During pump installation, it is crucial to differentiate the cutter fan from other components.

Cutter Fans: Enhancing Agitation and Solids Handling The cutter fan, also known as an agitator, has revolutionised heavy-duty submersible dredge pumps. Toyo Pumps was the pioneering manufacturer to incorporate this type of agitation into its designs. Venter says that their patented curved three-blade stirring attachment, threaded onto the pump shaft just below the suction inlet, became a gamechanger in handling solids-laden slurries.

The primary function of the cutter fan is to dislodge and re-suspend solids, creating a slurry. As fluid flows towards the pump suction, the cutter fan redirects a portion of the fluid away from the pump, generating a fanning effect.

This redirection and cyclic process result in a concentrated “pocket” of high solids content slurry directly in front of the pump suction inlet. This maximises the pumping efficiency and effectiveness, making it an essential feature for dredge pumps.

To protect the cutter fan, a stand is attached to the bottom of the pump. For larger pumps, an additional stub shaft is placed between the pump’s main shaft and the cutter fan, providing extra protection and stability during operation.

Operating the pump with a reversed rotation can lead to unscrewing of components during operation, resulting in potential damages and costly repairs.

To identify a cutter fan correctly, it is advisable to consult the pump’s rotational arrow. The cutter fan is easily visible and recognisable, as it pushes fluid away from the pump for agitation purposes. Observing the marked arrow during pump wiring ensures the correct rotation and installation of the cutter fan.

Cutter fans have significantly contributed to the efficiency and effectiveness of pump systems, particularly in managing solids and enhancing agitation. With a deeper understanding of the roles played by the cutter fan’s ability to redirect fluid and maximise solids management exemplify the advancements in pump technology. By correctly identifying and using cutter fans, pump operators can ensure optimal performance and avoid unnecessary operational issues,” Venter concludes.

IPR, +27 (0) 87 759 8654, admin@pumprental.co.za, www.pumprental.co.za

10

Pipes, Pumps and Valves Africa - Sep/Oct 2023

RADAR IS THE BETTER

ULTRASONIC 80 GHz level sensor with fixed cable connection (IP68)

All advantages of the radar technology:

www.vega.com/vegapuls

Right pumps will mitigate mines’ rainy season risks

PUMPS

During the drier months of the year, it is easy to forget that the pumping equipment at mining sites or process plants might not be up to the demands that the rainy season brings.

In fact, 90% of pump failures are from putting the wrong pump into the application. This is the view of Justin Bawden, Key Account Manager at Integrated Pump Technology, local distributors of Grindex submersible pumps. Being aware of the factors and influences of each application is vital to providing a suitable and lasting solution – which will mitigate the risk of flooding and consequent loss of life, equipment and production.

“Where dewatering activity is conducted, it is imperative that monitoring and forecasting of water inflows is done – whether on opencast or underground mines,” says Bawden. “This will allow for the necessary planning and specification of the correct capacity of pumping equipment, as well as hose sizes and materials.”

On one site, he says, a customer was able to meet dewatering requirements with just two 37kW pumps for most of the year. With the rainy season, they had to add another four of these units, based on their previous experience. He points out that Integrated Pump Technology understands these changing needs, and keeps the right pumps and quantities in stock.

“Another challenge is that mines will generally have multiple pumps located around their operations, and these are frequently moved from one location to another as needs change,” he says. “Personnel can lose track of which models and capacities are needed where – and the size and condition of the pipelines in place may not always suit the application.”

When responding to customer requests, Integrated Pump Technology is careful to ensure that the existing pipeline

12

Pipes, Pumps and Valves Africa - Sep/Oct 2023

on site is suited to the scale of the pumping solution. This means being clear on the pipeline’s diameter, length, material of construction, age and condition – as well as valves or bends that may affect flow.

Technological innovation is also helping to mitigate risk of pump failure, he explains. The smart unit on Grindex pumps, for instance, protects them against overheating, phase rotation and phase loss. There is also the air release valve, making Grindex pumps capable of running dry for extended periods of time.

He also recommends the regular performance testing of dewatering pumps to ensure they are still operating on their rated curve.

This will give added peace of mind that these units will deliver the expected duty in critical dewatering functions.

The tests should also confirm the energy efficiency of the pumps, to control operating costs.

The long term benefit of such tests is significant, he explains, as timeous maintenance interventions will ensure a longer product lifecycle. As part of its service offering, Integrated Pump Technology can run these specialised tests for customers on a range of pumps. Keeping sites effectively dewatered needs quick service turnaround too, so critical parts and basic repair kits are readily available for Grindex submersible pumps, notes Bawden.

Integrated Pump Technology, +27 (0) 11 894 2906, sales@pumptechnology.co.za, www.pump-technology.com

Versatility for the most demanding emerging market jobs: Godwin BD150 self-priming Dri-Prime® pumps This modular, mobile and highly efficient pumping solution takes care of industriallevel dewatering and liquid bypass jobs.

PUMPS

Tackle the most demanding dewatering jobs in mining, construction, industrial, municipal, marine, emergency response, and more with the Godwin BD150 family of selfpriming Dri-Prime® pumps.

With its modular base design, the BD150 offers a range of mobility options, including skid, two-wheel trailer, fourwheel trolley, forklift pockets, and four-point lifting frame.

It is easy to transport and move—an excellent workhorse for emergency, ad hoc and temporary dewatering jobs, and well-suited for rental transactions. The BD150 is as reliable for permanent jobs, providing standard engine-driven (regional emission compliant) and electric motor-driven options.

BD150 pumps are efficient and cost-effective solutions designed for emerging market conditions. BD150 DriPrime® pumps tackle challenging conditions, providing fully automatic vacuum or venturi priming (from dry to 8.5 m suction lift), and will handle sewage, slurries and liquids with solids up to 75mm in diameter. These pumps have flow capabilities up to 592 m3/h and discharge heads up to 49 metres.

These pumps provide a default 150mm/6in suction flange and delivery connections, with optional adapters to accommodate different sizes. Interchangeable impellers provide even more flexibility for different jobs. Abrasionresistant silicon carbide faces and the optimised centrifugal hydraulic design reduce wear and maintenance.

The simplified control panel with key start-stop, ammeter, hour meter and low oil pressure indicator streamlines operations.

The Godwin BD150 family of self-priming Dri-Prime® pumps tackle a range of dewatering applications, including: ● Wastewater bypass and stream diversions

● Digester cleaning and sludge removal ● Emergency drainage of floodwaters ● Site drainage ● Wellpoint dewatering ● Process pumping ● Temporary raw water supply, and ● Barge ballasting Portable or permanent, Godwin BD150 self-priming DriPrime® pumps are designed for Africa's most demanding conditions are efficient and low-maintenance performers for emergencies and continual operation.

Xylem, +27 (0) 11 966 9300, res-info.za@Xyleminc.com, www.xylem.com www.pump-technology.com

more than just a pump complete pumping solutions IPT-adv-180x50.indd 1

2022/11/21 11:54

Pipes, Pumps and Valves Africa - Sep/Oct 2023

13

Different types of pumps

PUMPS

A pump is a device used to transfer different types of liquids or gases from one place to another by applying mechanical action. These devices typically convert electrical energy into hydraulic energy.

Generally, pumps are operated by a mechanism (reciprocating or rotary) and take energy to do mechanical work that moves the working fluid. This equipment is capable of lifting liquids from low to high levels and moving fluids from low to high-pressure areas.

This action of the impeller causes the fluid velocity and pressure to increase and also directs it toward the outlet.

The pump casing is specially designed to compress fluid from the pump inlet, direct it into the impeller and control the fluid before discharging.

Pumps are powered by means of several power sources, requiring manual operation, electricity, engine, wind power, and more. Typically, pumps work by a vacuum in which air pressure forces the liquid out. All pumps work by creating an area of low pressure.

Pumps of this type are used for the water supply, fire protection systems, and beverage industries. These are also classified into three types, which are explained below.

Pumps have been used for so long, so it’s no wonder that there are a wide variety of sizes and types available.

Vertical centrifugal pumps are also referred to as cantilever pumps. These pumps have a unique shaft and maintained design that allows the volume to fall inside the pit because the bearings are outside the pit.

Types of Pumps Following are the main types of pumps: • Dynamic pump • Centrifugal pump • Vertical centrifugal pump • Horizontal centrifugal pump • Submersible pump • Fire hydrant pump • Positive displacement • Diaphragm pumps • Gear pump • Peristaltic pump • Lobe pump • Piston Pump

These centrifugal pumps are frequently used to move water from wells or pits located deep underground. They have a motor, a discharge head, a line shaft, a pump shaft, a number of bowls, impellers, and a suction bell.

Dynamic Pump A dynamic pump uses centrifugal force to create velocity in the liquid. This velocity is further converted into pressure energy by decreasing the kinetic energy. This difference in pressure moves the fluid through the system. It consists of a rotating impeller that creates a vacuum that moves the fluid. The impeller is held in the housing as it reduces the pressure at the inlet. This created motion drives the fluid outside the housing of the pump. At this stage, the pressure builds up to send it out for discharge. These are classified into two types. Centrifugal pumps are employed to move the fluid through the transfer of rotational energy from the rotor, this device is known as an impeller.

The fluid enters the rotating impeller and is ejected by centrifugal force through the vane tip of the impeller.

These pumps are used in the pumping industry.

Fundamentally, every stage is a divide pump. Each phase is housed in the same shelter and mounted on the same shaft. A minimum of eight stages can be mounted on a single horizontal shaft; otherwise, additional stages can be mounted. Each stage improves the head by around the same amount.

This pump uses a throttle bushing in its place of a filled container to cover the shaft. This kind of pump is frequently used with parts washers.

Horizontal Centrifugal Pumps A horizontal centrifugal pump’s shaft will be horizontally positioned, usually overhung or in between the bearings. In contrast, the shaft of a vertical centrifugal pump is pointed vertically. These pumps have a minimum of two impellers, but sometimes more.

These types of pumps are typically used in businesses that move sizable volumes of industrial fluids. This type of centrifugal pump has been made available as well as serviced by all types of pumps.

Submersible Pumps A submersible pump is a device with a tightly sealed motor that is close-coupled to the pump body. The entire assembly is submerged in the fluid being pumped.

Submersible pumps are also known as storm water, sewage, and septic pumps.

These types of pumps are primarily used in building services, domestic, industrial, commercial, rural, municipal, and rainwater recycling applications. These pumps are suitable for moving storm water, subsoil water, sewage, black water, grey water, rainwater, trade waste, chemicals, bore water, and foodstuffs.

Different impellers are used in plumbing applications, including closed-type pumps, convection pumps, vortex

14

Pipes, Pumps and Valves Africa - Sep/Oct 2023

pumps, multistage pumps, single-channel pumps, cutting pumps, and grinder pumps. A variety of options are available for various applications, including high flow, low flow, low head, and high head. #5 Fire Hydrant System It is intended to offer quick access to water in the event of a fire. The purpose of a fire hydrant installation is to provide water for the firemen to fight a fire. Each hydrant outlet is supplied with water through a system of pipework that is directly connected to the water supply main.

Positive Displacement Pump A positive displacement pump uses reciprocating, rotary, or pneumatic motion to move the liquid through the pump.

Here, the discharge of the fluid occurs in the form of pulses instead of a smooth liquid flow. These types of pumps are operated by trapping a fixed amount of fluid into the pump chamber at an inlet valve and then it discharges through an outlet valve. These pumps are utilized based on their ability to work in high-viscosity fluid at high pressure.

Diaphragm Pump A diaphragm pump is a pump that uses a combination of reciprocating rubber, thermoplastic, or Teflon diaphragms.

The diaphragm pump uses a rubber membrane and works on the air displacement principle.

In this type, the diaphragm is filled with one side of the fluid to be pumped (air or hydraulic fluid). As the volume of the chamber increases (the diaphragm moves upward), the pressure decreases, and fluid enters the chamber.

And when the pressure of the chamber is increased by the subsequently reduced volume (going down the diaphragm), the drawn fluid is drained out. Finally, the diaphragm moves again up, drawing fluid into the chamber, and completing the cycle.

Gear Pump The gear pump uses gear meshing to pump the fluid by displacement. They are known as the most common types of pumps that are utilized for hydraulic power applications.

As these gears rotate, they separate on the intake side of the pump which creates a vacuum and suction area for the fluid.

The fluid is moved by gears to the discharge side of the pump, where a meshing of gears replaces the fluid. This tighter clearance along with the speed of rotation of the gears effectively prevents fluid from leaking backward. The primary use of gear pumps is for pumping high-viscosity fluids in chemical installations.

PUMPS

Fire hydrant pump systems are also known as hydrant boosters, fire pumps, and fire water pumps. These powerful water pumps are designed to increase the hydrant service’s force because the mains are insufficient for construction site firefighting. The main uses for this system are for water transfer and irrigation.

Peristaltic Pumps A peristaltic pump, also known as a roller pump, is a type of positive displacement pump that is used to pump a wide range of fluids. Inside of a spherical pump casing, the fluid is housed in a flexible tube. Although linear peristaltic pumps have also been created, the majority of peristaltic pumps operate through rotary motion.

These pumps fall under the category of positive displacement pumps, and their primary uses are in the processing of chemicals, food, and water. It can pump a variety of liquids, including toothpaste and various chemicals, and creates a steady flow for measuring and blending.

Lobe Pumps A lobe pump, also known as a rotary lobe pump, is a positive displacement pump. It is comparable to a gear pump, with the exception that the lobes are shaped to almost meet rather than touch and rotate one another.

Lobe pumps also have better pumping spaces than gear pumps, which enables them to move slurries. These are made of stainless steel and have a high degree of polish.

These pumps have a variety of qualities to offer, including excellent high efficiency, rust resistance, hygienic qualities, dependability, etc. These types of pumps are capable of handling solids and fluids with high thicknesses without damaging them.

Piston Pump It is a positive displacement pump in which the highpressure seal reciprocates with the piston. Piston pumps can be employed to compress gases or move liquids. They can function under a variety of pressures.

Piston pumps can also handle viscous and solid-particle media. It works through a piston cup, an oscillation mechanism, where down strokes create pressure differentials, filling the pump chamber, then upstrokes push the fluid out. https://www.theengineerspost.com/types-ofpumps/#google_vignette Pipes, Pumps and Valves Africa - Sep/Oct 2023

15

Failure is not an option for the fire protection industry

PUMPS

Ultra-reliable is the only standard acceptable when it comes to building, testing and maintaining water pumps for fire fighting. To ensure all of its pumps are fully able to provide maximum performance instantly, under all circumstances, Ruhrpumpen has built a dedicated fire pump centre in Lancing, West Sussex and fitted its test-rig with the best torque sensors it could find on the market.

Ruhrpumpen is a global leader in high technology pump systems and is a major player in industries such as oil and gas, water distribution, chemical production, continuous processes, and nuclear power.

With the test-rig TorqSense transducers measure and record instantaneous torque levels in rotating pump drive shafts, with analysis of the data confirming real-time performance standards, in testing operations.

Identifying fire fighting as a crucial sector, it set up Ruhrpumpen Industrial Europa Ltd (RPIE) a Factory Mutual (FM) and Underwriters Laboratories (UL) certified manufacturing facility for fire water pumps in the UK.

TorqSense is made by Sensor Technology Ltd in Banbury and comes in a range of sizes for measuring torque, both rotary and static, from 10mNm up to 13,000Nm. Different ranges are based on different technologies, including full four element strain gauge bridges and optical measurement.

The FM and UL Approvals Bodies audit the facility quarterly, inspect calibration certification and carry out flow, pressure, power, NPSH (net positive suction head) and other relevant tests as required, ensuring that the facility maintains world-class standards at all times.

Ruhrpumpen Industrial Europa Ltd’s state-of-the-art fire pump manufacturing centre is fully equipped to design, assemble, test and package fire pumps for European market requirements.

It can also produce standard and highly-engineered pumping systems for a wide range of other applications industries, often using the technical requirements of firefighting to set benchmarks in other industries.

In addition to pumps and systems for use in the UK and Europe, the facility also provides parts and support for highly-engineered pump equipment to other Ruhrpumpen companies around the world, and offers product and system testing, training and specialist consultancy services.

None of these require hard wiring with slip rings, instead being designed for use with wireless radio frequency pickups which make set up and adjustment fast and simple.

Working with clients, experts from Sensor Technology can recommend the best transducer for each application.

As is a requirement in all fire pump testing, the torque transducers are all regularly calibrated by an independent ISO 17025 accredited calibration laboratory.

Sensor Technology also produce a full range of data display, recording and analysis interfaces.

Again, it is the work of moments to integrate these with the sensor heads. However, with fire water pumps being such a specialised and highly regulated field, Ruhrpumpen decided to use bespoke data systems developed to directly address the needs of the industry.

With these, data is recorded and analysed in Ruhrpumpen’s own performance test app before the final pump Test Report is made available. Naturally everything is tested and verified by qualified independent bodies on a regular basis.

David Gentle, Ruhrpumpen Industrial Europa Product Line Manager for EU Fire Systems, says: “We are a very high tech industry, but there is also a lot of human intelligence and input into our operations.”

We really value the support from the team at Sensor Technology and know we will always get a quick response from them, no matter when we call.

TorqSense transducers are lightweight, easy to use and we have recommended their adoption by our group subsidiaries around the world, all of whom are FM/UL certified.

Sensor Technology Ltd, +27 (0) 186 923 8400, info@sensors.co.uk, www.sensors.co.uk

16

Pipes, Pumps and Valves Africa - Sep/Oct 2023

Verder expands its footprint to extend service to Namibia and Kenya Verder Pumps South Africa, a market leader in advanced niche market and industrial pumping solutions, is pleased to confirm the addition of two new distribution partners that will see the company expand its footprint and network in Namibia and Kenya, furthering its ability to service more clients across sub-Saharan Africa (SSA).

The recently appointed distribution partners are Aqua Services & Engineering (ASE) in Namibia and Kubtech Engineering Services (KES) based in Nairobi Kenya with a clientele base and operations across East Africa (Kenya, Uganda and Rwanda). ASE is a recognised supplier and service partner in the water and wastewater treatment, mining extractions, industrial and hospitality sectors in

Namibia and KES specialises in process and automation, end-to-end project design and implementation, and procurement of related industrial supplies in a wide variety of industries and processes. Both partners are an excellent fit for Verder’s comprehensive, fit-for-purpose ranges of pumping solutions, that leverage the advantage of Verder Liquids’ unwavering tradition of technical excellence and innovations. The focus on developments and acquisitions lead by our global Group ensures we can continuously grow our range of OEM pump products and solutions offerings to customers in African markets.

PUMPS

“Expanding our network of local facilities and distributor partners is an important part of our growth strategy and enables us to offer our wide range of innovative industrial pumping solutions and leading technological equipment to more customers across SSA,” says Reinhard Seidel, Verder Pumps representative responsible for distribution management. “Through careful selection and onboarding, we are confident these two new distribution partners have the core business offerings, footprint and potential customer base in the geographical areas that they service to bring not only our high-tech equipment into their markets, but our in-house service and maintenance for quality and performance assurance as well.”

“Furthermore, as a South African company we are unwavering in our commitment to furthering the growth and development of local industries. Working with local partners who operate as regional and industry specialists is a key component of how we achieve this,” Seidel adds.

ASE and KES join Verder’s extensive distribution partner network, which includes Robday Mining Supplies for Rustenburg, Lydenburg and Steelpoort, Northfield Engineering for the Eastern Cape, and Tri-Pump Africa that operates in Zambia, Ghana, Tanzania and the Democratic Republic of Congo. This expanded network is meant to particularly benefit existing and new customers, overand-above customers who are currently serviced from the company’s headquarters in Johannesburg.

“Our focus remains on the quality and performance of our pumping solutions and technical support services as an integrated offering to the market. concludes Seidel.

Denis Machuma, Kubtech Engineering Services and Reinhard Seidel, Verder Pumps.

Verder Pumps South-Africa, +27 (0) 11 704 7500, info@verder.co.za, www.verderliquids.com

VERDERFLEX Ds500 Unlocking the future of water treatment

VERDER PUMPS SA TEL +27 (0)11 704 7500

StripAdvert_SA_180x65mm (2).indd 1

MAIL info@verder.co.za

WEB www.verderliquids.co.za

9/21/2023 11:53:17 AM

Pipes, Pumps and Valves Africa - Sep/Oct 2023

17

Exploring the efficiency and reliability of air-operated double diaphragm pumps

PUMPS

Air-operated double diaphragm pumps (AODD) have become a staple in numerous industries due to their exceptional versatility, efficiency, and reliability in fluid transfer applications. Pipes, Pumps and Valves Africa finds out more.

As positive displacement pumps, AODD pumps are proving their worth. Relying on compressed air to drive their operation, they are crucial for managing a wide range of fluid types, including viscous, abrasive, and shear-sensitive substances. These pumps are distinctive in their ability to handle dry running and deadheading scenarios, solidifying their position as a reliable choice across various industries, says Michael Um, product manager at Wilden.

Whether pumping water, aggressive acids, food products or solid-laden slurries, manufacturers of AODD pumps have realised that improved diaphragms are central in achieving better, more reliable pump performance. Over the years companies such as Wilden have invested extensively in research and development of diaphragms with some very meaningful revisions taking place.

The ingenious operation of AODD pumps AODD pumps operate by using compressed air to shift diaphragms, displacing fluid from one of two liquid chambers during each stroke.

The diaphragms in each chamber are linked by a single shaft, enabling them to move in unison. The process begins with applying pressurised air to the back of diaphragm A, initiating chamber B's suction stroke.

This creates a vacuum within chamber B, allowing atmospheric pressure to force fluid through the inlet ball valve and into the chamber. As diaphragm A completes its discharge stroke, pressurised air is redirected to the back of diaphragm B, starting chamber B's discharge stroke.

The hydraulic forces within chamber B facilitate fluid flow through the pump's discharge, mirroring a similar process in the opposite chamber. This cycle continues until the inlet air supply is interrupted or discharge pressure equals the air inlet pressure.

Central to the functioning of AODD pumps are diaphragms, explains Um. "These critical components facilitate fluid movement from the suction to the discharge side.

However, diaphragms are prone to wear and tear due to their constant flexing and exposure to various fluids and environmental conditions. Similar to a car's tires, diaphragms are regularly replaced parts. Understanding the nuances of diaphragms—material types, designs, and compatibility—is therefore pivotal in achieving longer durations between repairs."

Factors influencing diaphragm failures According to Um, diaphragm failures can stem from many factors, including forced inlet pressure, outer piston abrasion, flex creases, chemical attacks from incompatible fluids, and excessive temperatures. "Each failure type can be exacerbated by the application's unique demands, compatibility issues, or temperature extremes," he says.

"Selecting the appropriate diaphragm material and design tailored to specific temperature limits is essential for prolonging the pump's longevity and efficiency."

Many manufacturers offer downloadable guides and manuals that align diaphragm designs with temperature requirements to aid in diaphragm selection. Ensuring compatibility between material and application conditions can significantly minimise the risk of failure. It's imperative to use authentic or OEM parts to prevent voiding the pump's warranty and to avoid detrimental impacts on operational safety and flow rates, warns Jorge Hernandez, a product specialist at PSG.

18

Pipes, Pumps and Valves Africa - Sep/Oct 2023

When making a diaphragm selection, several vital factors demand attention, the first being chemical compatibility.

Hernandez says ensuring the diaphragm's material is compatible with the pumped fluid is critical.

Temperature tolerance is just as important, meaning maintaining flexibility at low temperatures and resisting degradation at high temperatures. Another factor to keep in mind is resilience to abrasion.

It is also true that different diaphragm materials exhibit various performances on the factors that must be factored in, so it is always advisable to get expert advice before purchasing. Proper diaphragm selection and advice repeatedly result in safe, efficient, cost-effective, and trouble-free pump operations.

"Air-operated double diaphragm pumps are a linchpin in modern industries due to their ability to handle a diverse array of fluid transfer tasks," says Um. "Their unique positive displacement mechanism, reliance on compressed air, and compatibility with various fluid types position

PUMPS

This refers to the capacity to endure friction and wear from solid particles in the fluid. Sanitary standards adherence or compliance with hygienic or clean regulations, as well as inlet demands, have to be considered. Hernandez explains that the capability to move fluid from one point to another efficiently is a significant issue. Predicting the diaphragm lifespan before necessitating replacement and cost considerations also play a role. Both Um and Hernandes say comprehensive ownership cost should be equalled, encompassing initial price, rated flex life versus the application, and expenses associated with downtime and diaphragm replacement labour. them as a dependable solution for applications requiring efficiency and reliability." Hernandez says while diaphragm failures are inevitable, their root causes can be addressed through proper selection, maintenance, and a thorough understanding of the pump's operation. He maintains that AODD pumps will remain at the forefront of fluid transfer innovation as technology advances, serving as indispensable tools across industries worldwide.

"Choosing the correct diaphragm requires knowing and considering all of the process parameters," he concludes.

Pipes, Pumps and Valves Africa - Sep/Oct 2023

19

Streamlining pump selection: the power of the Atlas Copco algorithms

PUMPS

The Atlas Copco pump selection programme, available to IPR customers via the company’s website, offers a range of benefits that can greatly enhance the pump selection process. IPR is a specialised dewatering and dredging pump specialist and is the master distributor for Atlas Copco pumps in southern Africa.

Ruaan Venter, Business Development Manager at IPR, highlights the advantages customers can enjoy when using this programme.

the start, irrespective of the application, avoids costly mistakes such as equipment failure or excessive energy consumption.”

One of the key advantages is the programme's ability to provide accurate pump selection. By inputting relevant parameters such as flow rate, pressure requirements, fluid type and site conditions, the programme can recommend the most suitable pump model. This ensures that customers obtain a pump that meets their specific needs, minimising the risk of oversizing or under sizing the equipment.

The programme also focuses on enhancing efficiency and performance. It considers variables such as duty cycle, system pressure and hydraulic losses to optimise the pump's efficiency. Venter explains that by operating at its highest efficiency point, the pump can achieve energy savings and improved overall performance, resulting in lower operating costs and increased productivity.

Time and cost savings are another significant benefit of the Atlas Copco pump selection programme. “Instead of manually researching and comparing various pump models, customers can rely on the programme's recommendations,” Venter says. “This streamlines the selection process enabling faster decision-making.

Additionally, selecting the appropriate pump from

20

Pipes, Pumps and Valves Africa - Sep/Oct 2023

Comprehensive pump information is another valuable feature of the programme. Customers can access detailed specifications, performance curves, power requirements, dimensions and other relevant data for each recommended Atlas Copco pump model. This enables customers to evaluate and compare different pump options, empowering them to make informed decisions based on their specific requirements.

Moreover, Venter emphasises, IPR customers using the Atlas Copco pump selection programme have access to technical support from the company’s pump experts.

“If customers have any questions or require additional guidance during the pump selection process, they can rely on our support team for personalised and reliable assistance, ensuring customers receive ongoing support throughout their equipment selection journey,” he says.

Using the hydraulic calculations, the programme matches the user's requirements with the available pump models in the Atlas Copco range. To do this, it considers pump type, size, efficiency curves and technical specifications to identify the most suitable options, and then provides performance analysis of the selected pump models.

The programme generates performance curves, offering insights into the pump's efficiency, head-flow characteristics, power consumption and other performance indicators.

Venter says that users can compare multiple pump models side by side using the programme. “This feature allows them to assess performance, efficiency, dimensions and other key characteristics, all aiding at facilitating an informed decision,” he says.

The Atlas Copco pump selection programme was designed with the primary aim of optimising the pump selection process, and provided the correct input parameters are provided it will recommend the most efficient pump size, impeller configuration and other features that could enhance performance while meeting user requirements.

Depending on the application, the programme factors in material compatibility, environmental regulations, noise levels and other site-specific requirements to ensure the selected pump is suitable for the given conditions.

Venter says the algorithms typically employ hydraulic calculations, performance modelling, database integration, optimisation techniques and user-friendly interfaces.

The algorithm begins with hydraulic calculations, using the user's input to determine pressure requirements, flow rates, head losses and other hydraulic parameters.

Factors like fluid properties, pipeline dimensions, elevation changes and system restrictions are considered.

PUMPS

A gamechanger in the pump selection process, the programme is simple to use and users provide specific parameters including flow rate, pressure or head requirements, fluid properties and site conditions. These input parameters lay the foundation for accurate pump selection, and this information is used to perform hydraulic calculations which consider factors such as friction losses, elevation changes, system restrictions and fluid properties to determine the required pump performance.

Performance modelling comes into play as the algorithm uses pump-specific performance curves and mathematical models. These models are based on empirical data and extensive testing, allowing the algorithm to match the hydraulic calculations with the pump performance models to identify suitable options.

Database integration is crucial, as the algorithm accesses a comprehensive database of pump models with technical specifications, performance curves, efficiency data, and other relevant information. It compares the hydraulic calculations against the database to find pumps that meet the required performance parameters.

Optimisation techniques may be employed to fine-tune the pump selection process. The algorithm considers factors such as energy efficiency, NPSH requirements, impeller size and other design parameters to optimise performance and reliability. It can provide recommendations based on these optimisations.

To ensure user-friendliness, the algorithm is integrated into a software interface and is available as an online tool on the IPR website. This interface allows users to input their requirements, view performance data, compare pump models and receive recommendations. The algorithm processes the user input and presents the outputs in a clear and accessible manner.

“Of particular significance is that Atlas Copco's specific algorithm includes additional components and refinements tailored, and was developed leveraging expertise, experience and extensive pump knowledge resulting in a robust and accurate algorithm for pump selection, “ Venter concludes.

IPR, +27 (0) 87 759 8654, admin@pumprental.co.za, www.pumprental.co.za Pipes, Pumps and Valves Africa - Sep/Oct 2023

21

Jetting equipment options for mining operations Effective cleaning systems are a critical part of mining operations, and having the right equipment is invaluable for keeping sites functioning well and aligned with regulatory requirements.

PUMPS

Some of the most useful options for cleaning functions on site are high-pressure washers, vacuuming systems and combination jetting and suction units.

Sebastian Werner, MD of Werner Pumps, a leading manufacturer of high-pressure jetting equipment and industrial vacuum solutions in South Africa says that it’s important to meet cleaning and maintenance needs with the right equipment for the job.

“Mines will require equipment best suited to their specific applications, whether it’s jetting or vacuuming, wet or dry material, and so on,” he adds.

Vacuuming solutions Many of the by-products from mining processes need to be carefully managed. Vacuum cleaning equipment can help maintain systems on a mine and assist with the cleaning up of spills, industrial sumps and slurries, dry materials and industrial wastes.

In tailing dams, for example, waste products from mining, whether they are liquid, solid or a slurry, that need to be kept from contaminating water sources or polluting the environment have to be monitored and maintained.

“When the slurry of mining waste is piped into the dam, the solids settle to the bottom and the water is recycled to be used in the separation process again,” explains Werner.

“But if the drainage system in that dam gets blocked, it can pose major safety risks.” Werner Pumps’ large vacuum

22

Pipes, Pumps and Valves Africa - Sep/Oct 2023

trucks can be used for vacuuming industrial sumps and slurries and can help unclog pipes so that the dams’ draining systems can flow freely. High-pressure jetting equipment can also be used for jet-rodding, where the walls of the dam’s drainage system are scoured. This can also help in identifying damaged pipes.

High-pressure cleaning Depending on the application, different pressure capacities are also important. Werner Pumps supplies smaller trailermounted high-pressure and ultra high-pressure jetting units, as well as larger truck-mounted units for industrialscale applications.

“We initially designed the trailer units for domestic applications and smaller sewerage clearing operators and municipalities who were looking for a more cost-effective option than investing in a truck unit, but we’ve found that because they are so easy to transport, they are much lighter and they can get into tight spaces, they are ideal for other niche applications,” says Werner. “We have a customer who uses one of our trailers not only for tailings dam maintenance on the mines, but also for clearing out piping in the boreholes they drill too. The trailer-mounted unit continues to be one of our most versatile offerings.”

These small jetting units can get to places where accessibility is a challenge on site at a mine, such as boiler tubes that need to be cleaned, which can solve a number of headaches for maintenance teams.

The units are high-quality, 100% locally manufactured, and customisable for every customer’s specific requirement.

They range from 8 litres per minute to 500 litres per minute, with pressures from 50 Bar to 2800 Bar and power from 2.5kW to 500kW, while the ultra-high-pressure units (such as those used in the tailings cleaning applications) offer 1000 Bar and are also suitable for applications such as rubber and scale removal. Werner Pumps not only supplies cleaning pumps for these applications, but offers a range of process pumps for highly unstable and explosive products too.

PUMPS

Combination jetting and suction units For unblocking and cleaning sewer lines, stormwater drains and sewer pump stations, combination jetting and suction units are an effective solution.

Rather than operators having to use multiple vehicles for sucking and jetting, this piece of equipment’s ability to perform suction and jetting can save on costs, time and labour when it comes to sewerage cleaning operations.

“Our Impi Combi Truck is a premium-quality, locallymanufactured truck-mounted unit with a tilting 12 500l, 304 stainless steel tank, a hydraulically-driven highpressure pump capacity of 295l/min at 150 bar, and a vacuum pump with 1 700 m3/hr suction capability,” Werner explains.

Werner Pumps also supplies a comprehensive range of accessories for its units, including low-water inlet switches, high-pressure jetting hoses (20m, 30m or 50m), high-pressure guns with lances, nozzle holders and fan nozzles. “We do our best to be a one-stop shop for all our customers’ high-pressure jetting and vacuuming needs and can provide advice on how best to service particular mining applications,” Werner says.

Werner South Africa Pumps & Equipment, +27 (0) 11 362 6280, sebastian@wernerpumps.com, www.wernerpumps.com

Pipes, Pumps and Valves Africa - Sep/Oct 2023

23

Keeping mill circuit pumps running, the key to efficient operations

PUMPS

The requisite levels of support are critical to ensure optimal performance of a mill circuit, as is the correct selection of the mill circuit pump. Attention to both these aspects will facilitate cost efficient and optimum operation of the circuit; however, cautions Marnus Koorts, General Manager Pump Products at Weir Minerals Africa, each is as important as the other.

Weir Minerals Africa has a focus on delivering reliable solutions to customers that will provide the required performance while facilitating the lowest total cost of ownership. This, Koorts says, has seen the Warman® mill circuit pump become the preferred choice across numerous plants in Africa.

Commenting further, Koorts says that the requisite support level often requires significant investment by the pump Original Equipment Manufacturer and means having the correct parts readily available on or close to a customer site. This should be backed by the technical competency required to keep the pump running, he says.

“What is essential to understand is that a mill circuit pump is not an off-the-shelf solution. Mill circuit pumps are engineered to provide optimum performance under the arduous operating conditions on individual customer sites and need to be configured to achieve the requisite hours between scheduled maintenance shutdowns,” he says.

“Close collaboration with customers and a comprehensive understanding of the plant’s operating parameters are crucial to ensure the solution provided will meet the

24

Pipes, Pumps and Valves Africa - Sep/Oct 2023

operational requirements,” he says.

One of the primary considerations when it comes to mill circuit pumps is the ability to handle large particles and high flow rates. Wear and tear in these pumps are directly proportional to the size of particles passing through, necessitating specific construction materials and design features.

Koorts says a major differentiator is that the Warman® mill circuit pumps are physically larger for the same flow rate, reducing wear by operating at lower speeds. This strategy has paid major dividends for customers and is one of the reasons for the popularity of the Warman® brand in Africa.

“Another crucial aspect is the engineering of the hydraulic chamber, which enhances wear resistance and increases efficiency. This is achieved through the unique design of the vanelet which significantly minimises unwanted turbulence and reduces both wear and energy consumption,” he explains. The reduced energy consumption not only contributes to the bottom line but also ensures a relatively short payback period for the capital investment.

“Material selection for mill pumps often sparks debate, but experience in the field has shown the undeniable benefits of rubber liners,” Koorts says.

“Rubber liners extend wear life, handle impact associated with large particles, and are more cost effective and easier to handle.” Recognising the advantages, Weir Minerals has made substantial investments in rubber production facilities to manufacture these liners for customers.

PUMPS

However, when applications demand it, a wide range of metal options are also available. Koorts says good examples would be Hyperchrome® A61 alloy which is particularly good for fine particle wear that’s often seen between the impeller and the throat bush, and Ultrachrome® A05 alloy which would be used for the shell as it works well with general coarse particle abrasion.

With over 20 branches across Africa and the Middle East, Weir Minerals Africa ensures local technical support is readily available to customers. This proximity allows the Weir Minerals Africa teams to gain a deep understanding of each customer’s operation and provide comprehensive support to ensure uninterrupted pump operation. To facilitate easy access to parts, the company recommends a strategic parts list and encourages customers to keep these components on-site. Critical parts are also stocked at the nearest Weir Minerals Africa branch.

“If the wear characteristics are higher than anticipated in an application, this is where the interchangeability of components plays an important role. Most of our designs allow for interchangeability between metal and rubber components based on specific wear characteristics.”

Koorts also points out that over time, changes in the slurry composition or ore grade processed by a plant can affect pump efficiency and increase wear.

He says that Warman® mill circuit pumps offer standard and low flow liner capabilities, enabling operators to adjust the flow rate as needed without compromising the original installation.

Retrofit optimisations are increasingly common as mineral processing plants evolve and seek to reduce their total cost of ownership.

Weir Minerals Africa has made substantial investments in an engineering team capable of seamlessly integrating the Warman® mill circuit pumps into existing installations, and they work closely with engineering, procurement, construction management (EPCM) contractor, and project houses ensuring all stakeholders can make an informed decision regarding pump selection and configuration.

EMVAFRICA_95x180_PUMPS AND VALVES_AWP.indd 1

Weir Minerals Africa, +27 (0) 11 929 2600, Africa.minerals@mail.weir, www.minerals.weir

2023/08/22 08:35

Pipes, Pumps and Valves Africa - Sep/Oct 2023

25

PUMPS

Tsurumi Pump’s innovative ground drainage pumps offer a smart solution for addressing low-level dewatering needs

Accumulated water on surfaces poses significant challenges and potential hazards across various properties and activities, including golf courses, parking lots, and construction sites. On golf courses, flooding leads to erosion, compacted soil, and waterlogged greens, negatively impacting playability and necessitating costly repairs.

Floodwater in parking lots can harm pavement surfaces, jeopardize structural stability, and disrupt traffic flow.

Erratic weather patterns have resulted in heavy rains that can inundate homes and construction sites, resulting in structural degradation, mold growth, and material losses.

Excess water on construction sites also hampers daily operations and compromises valuable equipment.

Effectively countering these challenges demands thorough preparation and access to dependable, efficient dewatering equipment. Over the years, Tsurumi’s ground drainage pumps have gained a reputation for their effectiveness and cost efficiency in low-level water pumping. The LSC and LSR series offered by Tsurumi are submersible electric pumps capable of efficiently draining water from depths as shallow as 0.04 and 0.2 inches, respectively.

Tyrone Hipwell, Tsurumi’s Northwest Sales Manager, noted: “These pumps offer real-world solutions to critical challenges encountered by our clients in diverse settings.

Their versatility enables them to adapt to various water levels and situations. Engineered with internal check valves and prime-through-discharge technology, they assist with easy startup and sustained suction. These pumps even permit seamless transportation between bodies of water without losing prime.”

Distinguishing themselves through smart design and industry-leading features, the LSC and LSR pump series incorporate various design elements that ensure their durability and reliability in demanding environments.

They feature dual internal mechanical seals with silicon carbide faces, guaranteeing extended operational lifespan by averting leaks and wear. Tsurumi’s patented oil lifter ensures essential lubrication to seal faces, prolonging the pump’s longevity and maintaining smooth operation.

Having spent numerous years in the pump industry, Hipwell attested to Tsurumi’s ground drainage pumps’ efficient design. “Constructed from the most durable materials and equipped with numerous design features, these pumps simplify surface dewatering,” he explained.

“Our units are capable of pumping to remarkably low levels with uninterrupted suction, providing us with a competitive edge. We have received positive feedback from users spanning various industries.”

In addition to its design excellence, Tsurumi has been bolstering inventory levels and nationwide parts availability while enhancing logistical capabilities. This commitment ensures that customers can access equipment whenever needed. Hipwell underlined: “Our team of engineers and distributors have gained recognition for their swift and effective assistance, underscoring our commitment to delivering a seamless customer experience. This proves especially vital when dealing with unwanted water incidence, which can disrupt projects and livelihoods.

Effective water management is of utmost importance, and we approach it with the highest commitment.”

Tsurumi Pumps Africa, +27 (0) 82 404 4743, enquiries@tsurumipumpsafrica.com, www.tsurumipumpsafrica.com

26

Pipes, Pumps and Valves Africa - Sep/Oct 2023

We offer valves for precision processes - and demanding applications.

Our valves fulfill the highest of standards and are designed for many years of safe and reliable operation. Our service specialists regularly check, monitor and maintain all relevant system components - depending on what has been agreed.

Our modular framework agreements offer you individual service and spare parts concepts. And we even go one step further. We additionally check systems for efficiency in order to reduce operating costs and increase productivity.

For example, with the SES System Efficiency Service.

ZTS GATE VALVE

GATE VALVE AKG-A/AKGS-A

STAALWEDGE GATE VALVE AKDS/AKD

NORI 500

Contact our dedicated Valves Sales Engineers for all your Valve requirements Tel: 011-876-5600 • Email: info-za@ksb.com KSB Pumps and Valves (Pty) Ltd www.ksb.com/en-za Your Level 1 B-BBEE Partner

BOA - H

What is a flow control valve?

The valves which are mainly used to regulate the flow of fluid in hydraulic circuits are known as "flow control valves". The flow control valves are widely available in many different types according to their use.

VALVES

In hydraulics, flow control valves are used to control the amount of oil supplied to various parts within a hydraulic system. In this way, the momentum of a cylinder or the rotational speed of a hydraulic motor can be controlled.

However, a basic flow control valve has an opening that can be changed to increase or decrease the flow rate. The many benefits of using flow control valves include the variety of materials from which they can be made (such as brass, carbon steel, stainless steel, and zinc).

Flow control valves can provide many choices for simple and complex systems that adjust for pressure, temperature, and other flow variables.

Parts of Flow Control Valve Following are the parts of the flow control valve: • Body • Bonnet • Trim • Disk and seat • Stem • Actuator • Handwheel • Valve packing Body It is the main part of the flow control valve, in which all other parts are kept together by a structure called the body. The piping in the valve body is achieved with the help of bolts and welded joints. It is usually made of cast iron and is also called a valve shell.

Bonnet The bonnet is a cover that is used for the opening in the body and is divided into two parts which are fastened together. Some valve bonnets are used only as covers while some of them are used for valve interior accessories.

Trim The trim is usually presented on the inside of the valve and consists of the stem, sleeve, seat, and disc. Valve performance can be detected by the seat and disc interface.

Disk and Seat A disc is an essential part of the flow control valve that allows and restricts fluid flow. If the disc is in the closed state then the total system pressure is applied to the disc and the pressure is exerted towards the outlet.

Stem These are liable for the connection of the actuator and the disc, which holds the disc in position. The connection is done by the threads and welded joints. Generally, two types of the stem are used which are non-rising stem and rising stem.

Actuator This is the main part of the flow control valve, which is driven by the stem and disc assembly. Control valve actuators may be operated manually or by an electric motor.

Handwheel It is a common type of valve actuator. A valve handwheel is used to manually control the opening and closing of the valve.

Valve Packing It is a sealing system that has a deformable material in the solid form or split rings held in a packing box. These are used for packing in valves which consequently prevents leakage between stem and bonnet.

Working of Flow Control Valve The flow of the fluid can be controlled by changing the place through which it is passing. In this, a pressure drop occurs and this must be considered when choosing a flow control valve.

In a hydraulic circuit, the pressure fluctuates across the load, sometimes more or less. Although the inlet pressure is constant, the pump is delivering fluid at constant pressure but the outlet pressure can vary.

To avoid this fluctuation in load we can easily install a pressure compensated flow control valve. By using this flow control valve, the flow rate can be kept constant even under variable loads. These valves have a spool and by changing the position of the spool, the field direction of the passage can be adjusted. Therefore, the required flow can be maintained during the flow of the fluid through the control valve.

Types of Flow Control Valves • Gate valve • Plug valve

28

Pipes, Pumps and Valves Africa - Sep/Oct 2023

• Needle valve • Non-return valve • Butterfly valve • Pressure compensated flow control valves • Pinch valve • Globe valve • Diagram valve • Ball valve Gate Valve The valve controls the flow of the oil in a pipe by moving a flat plate called a gate or disc valve. Gate is built perpendicular to the length of the pipe with the help of a handwheel.

Plug Valve As the name suggests, this valve is having a plug. This plug can be turned to move its ports to control the flow of oil and it features to reduce the friction between the plug face and the body seat when the turning of the plug.

The valve consists of a tapered wedge mechanically seated in the body. The tapered edge has a rectangular window.

When the valve is fully open rectangular window aligns itself with the holes running through the valve body.

Needle Valve It is a kind of screw-down stop valve. Its use is restricted to small sizes which have the body ends in line or right angles with each other or maybe oblique type.

Here disc is in the form of needlepoint. By rotating the handwheel, the tapered needle advances, and the area of the valve seat decreases. Hence the oil flow is gradually reduced. These valves are used in hydraulic systems in lines of delicate pressure gauges.

Non-return Valve The non-return valve permits flow in one direction and stops the flow completely in one direction and stops the flow completely in one direction. It consists of a valve body, a poppet, a spring, and a seat.

When the force of fluid is available at the inlet port exceeds the strength of the spring and the backpressure of oil the poppet is pushed up and the valve opens to permit the flow through it. When the oil is flow is reversed, the valve piston is pushed back to its seat, completely blocking the flow.

Butterfly Valve The butterfly valve has a circular disc that can be rotated through one complete revolution. The circular disc has a diameter equal to that of a pipe.

The valve is connected across both faces by two pipes with flanges. A circular disc is made to rotate around an axis passing through the vertical diameter of the disc. This type of flow control valve is used for controlling moderate flow.

Pressure Compensated Flow Valve The pressure compensation flow valve provides a uniform

Pinch Valve These are types of flow control valves, which are inexpensive and are used in almost all industries. It consists of flexible elements such as rubber tubes for sealing purposes.

They are designed to give a tight seal around trapped solids with their flexibility, these rubber tubes are the moistened part in a pinch valve.

Pinch valves are perfect for liquids that contain large amounts of suspended solids. The valve body acts as a built-in actuator, reducing the need for expensive operators such as pneumatic, hydraulic, or electric operators.

Globe Valve These are considered valuable for starting, stopping, and regulating the flow in a linear motion. Globe valves are used for throttling applications because the disc of the valve can be completely removed from the flowline and are also capable of closing the flowline completely.

VALVES

This mechanism is achieved by connecting the gate with the handwheel through a threaded spindle that rotates in the valve body. The advantage of a gate valve is that it offers little or no resistance to flow when it is fully open. It is usually made up of gunmetal.

volume flow rate independent of the pressure drop across the valve. On the other hand, the nonpressurecompensated valves have a variable flow rate that changes as the pressure in the valve fluctuates.

Unlike the other types that are straight-through valves, these valves produce slightly high-pressure drops.

The closure in a globe valve is opened by means of a plug that covers a flat bottom and is then lowered onto a horizontal seat in the center of this valve. The plug in the globe valve lifts when the user opens it, and this allows the fluid to flow.

Diaphragm Valve These valves are built to handle conditions that require erosive, corrosive, and dirty services. It consists of a flexible disc that reaches the top of the valve body along with the seat to form a seal. These are used to control the opening or closing of the valve.

These valves work by an elastomeric diaphragm in the valve body, rather than an elastomeric liner, which is attached to a compressor to isolate the closure element from the fluid flow. This gives the advantage that they feature a leak-proof seal and are easy to maintain.

Ball Valve Ball valves are commonly used in a variety of industries because of their low cost, durability, and excellent closing capability. These are similar to a butterfly valve, they are not suitable for flow control applications as they require high accuracy and control.

This is because a high level of torque is required to open and close a ball valve which prevents an operator from making fine adjustments. The ball valve is used for filling a tank with reasonable accuracy. A trunnion or V-port ball valve design is usually the best type.

Flow control valves are used for plumbing, mechanical, and gas distribution applications. Therefore, there are many factors to consider when selecting a suitable flow control valve such as media type, valve function, application conditions, actuation method, and maintenance requirements.

Pipes, Pumps and Valves Africa - Sep/Oct 2023

29

One solution for butterfly, ball/ plug and globe valves Compact actuators with intelligent functions as platform concept for tailored automation solutions.

VALVES

Each PROFOX is equipped with a centrally located LED: The FOX-EYE. It provides clearly visible information about both actuator and valve status. The FOX-EYE display scheme can be configured by the user as required.

Part-turn version PROFOX PF-Q AUMA´s flexible platform for intelligent valve automation As cunning as a fox: AUMA’s new smart actuators What do a fox and an electric valve actuator have in common? A lot, if the actuator in question is AUMA’s brand-new PROFOX. Like its namesake, PROFOX is not only cunning and adaptable but also extremely hardy.

AUMA’s more than 50 years of experience developing and manufacturing electric actuators has yielded a highperformance actuator series with exciting new features and an excellent cost-benefit ratio. Aimed at applications requiring fast and precise positioning, utmost flexibility and future-proof interfaces, the smart and compact PROFOX series is suitable for all industry sectors, including water treatment, combined heat and power plants, process industries, and shipbuilding.

Cunning Built-in intelligence makes PROFOX equally suited to both simple open-close duty and challenging modulating applications. Motor speed is adjustable, ensuring fast and precise positioning without overrun. Soft start and soft stop functionality increases valve lifetime. Operating costs are low, thanks to high mechanical efficiency and low standby consumption. Innovative diagnostics ensure longterm availability and future-proof PROFOX actuators for IIoT applications.

Adaptable AUMA PROFOX actuators work with gate, butterfly, ball and globe valves. There are multi-turn versions for torques of 10 – 100 Nm and part-turn versions delivering 32 – 600 Nm. A linear actuator will follow soon. Modular design ensures flexible configuration, rapid delivery and consistent operation. Host system integration is equally flexible; PROFOX actuators support the most common communication protocols and are well prepared for future evolutions. Compact design allows PROFOX actuators to fit tight spaces.

Hardy The PROFOX series is engineered and built in Germany – and designed to last, even under the toughest process conditions. High-quality metal housing with IP67 protection (IP68 optional) and AUMA’s unique corrosion protection, which meets the highest C5-M/C5-I requirements of EN ISO 12944-6, ensure that PROFOX actuators have a long life at temperatures from –30 °C to +70 °C. PROFOX actuators are simple and easy to use. Installation and commissioning are fast and convenient, using either the integral pushbuttons or an intuitive app. The FOX-EYE indicator light and a position indicator on the housing clearly show the actuator status at any time, even from a distance.

“The new PROFOX actuator series is set to lead the market thanks to its unique combination of features,” says AUMA product manager Christoph Edelmann. “It offers unprecedented intelligence, precision, efficiency and flexibility at a very attractive price.”

AUMA South Africa (Pty) Ltd, +27 (0) 11 363 2880, mark@auma.co.za, www.auma.com

30

Pipes, Pumps and Valves Africa - Sep/Oct 2023

Zenzele Valves SA company through the efforts of dedicated and historically disadvantage men and women manufacturing and supplying products and services of the highest standards and quality.

Triple Offset Butterfly Valves Double Offset Butterfly Valves Rubberling Butterfly Valves Wafer Type Butterfly Valves Conventional Non-Return Valves Tilting Disc Check Valves

+27 (0) 11 028 4221 +27 (0) 11 474 6180 www.zenzelevalves.co.za

Wedge Gate Valves Resilient Gate Valves Knife Gate Valves Ring Needle Valves Sleeve / Discharge Valves

sales@zenzelevalves.co.za 1165 Domkrag str, Robertville, Florida, Roodepoort

The power of the duckbill

VALVES

Backflow is among the most common causes of failure in bubble diffusion systems.

Learn how adding only a few inches of elastomer can eliminate backflow risks and optimize diffused aeration processes.

For a steadily growing percentage of wastewater treatment facilities, bubble diffusion systems are the centerpiece of an efficient, reliable, and thorough aeration process.

bubble diffusion system must ask one question, however, that is more consequential than any other: What happens when airflow suddenly stops?

In settings ranging from aerobic digesters and biological nutrient removal reactors to settling ponds and equalization basins, bubble diffusion systems distribute controlled bursts of oxygen from a blower or air compressor throughout the tank.

Coarse bubble diffusion boasts several advantages over other approaches to aeration.

Compared to fine bubble diffusion, for example, coarser bubbles tend to rise through the process fluid faster and with more force, shearing more easily through viscous wastewater.

This steady influx of oxygen discourages solids in wastewater from settling to the bottom of the tank, a vital concern in many primary and secondary wastewater treatment processes.

Questions surrounding the best ways to optimize diffused aeration technology are as diverse as the systems themselves.

Where in the tank should aerators be installed to mix the entirety of the wastewater pool without leaving behind dead zones? What is the ideal bubble diameter to strike a balance between oxygen transfer and energy costs?

Operators in every wastewater facility that features a

Mechanical approaches to aeration, such as via propellors and brush aerators, tend to be more energy intensive.

They also run the risk of aerosolizing wastewater pollutants, which can worsen odor issues within the facility and its surroundings. Coarse bubble diffusion is an ideal way to keep solids in suspension and maintain a completely homogenous mixture with minimal energy and maintenance concerns.

Preventing Backflow With Duckbill Check Valves Whether airflow loss occurs voluntarily, such as to enhance denitrification or sludge-thickening processes, or involuntarily, such as during a power outage, even momentary airflow loss creates risks of backflow.

Backflow occurs when a sudden loss of pressure causes wastewater — as well as any number of hazardous substances it may contain — to seep backwards through the bubble diffusion system into the manifold of the blower or air compressor. This type of backflow can not only reduce system efficiency by clogging the pipeline with accumulated fluids, but also cause serious damage to aeration and diffusion infrastructure. Backflow is one of the most common culprits behind bubble diffusion system failure.

To minimize these risks, bubble diffusers require reliable and well-designed backflow-prevention mechanisms.

Several options exist on the market, but one of the most dependable is the duckbill check valve.

Duckbill check valves feature a pliable, rubber-like piece with a high sensitivity to static head pressure, which in the context of wastewater aeration results from the interaction between oxygen-propelled fluids and gravity. These valves, mounted over the emittance point of a bubble diffuser, remain open while the flow of oxygen creates static head pressure. However, the piece instantly snaps shut to a 100% closed position upon loss of static head pressure, eliminating backflow risks and protecting both the diffuser and the aerator manifold piping.

Empowering Beneath-the-Pipe Placement In most types of diffusion-based aeration systems, particularly coarse bubble diffusers that feature wider openings than fine bubble systems, the lingering threat of backflow during airflow loss often necessitates installation

32

Pipes, Pumps and Valves Africa - Sep/Oct 2023

on either the top or side of aeration pipes. As airflow loss causes suspended media in the wastewater to settle along the bottom of the tank, pointing a diffuser downward will increase clogging risks if it becomes submerged in settled solids.

Bottom placement also means that any liquid that may have accumulated inside the aeration pipe via condensation during airflow-free periods will immediately blow out into the tank upon blower reactivation. This liquid does not discharge as easily from pipes with side- or top-mounted diffusers, increasing risks for buildup that can compromise the long-term efficiency of the system.

Perhaps the greatest benefit of installing a diffuser at the bottom of the pipe, however, is its effect on the aeration system’s mixing capacity. Generating bubbles along the sides or top of the aeration pipe leaves behind a dead zone at the bottom of the tank — often only a few inches, but sometimes as large as a few feet — without agitation, creating potential for solids to accumulate. By providing whole-of-tank coverage, installing diffusers at the bottom of the pipe can eliminate the need for system owners to manually clean the bottom of their tanks or deploy bottom-scrubbing devices, both of which run the risk of damaging the pipeline through accidental bumps.

Meet the ProFlex™ Series 730CBD ProFlex™ Series 730CBD Coarse Bubble Diffusers, available from Proco Products, Inc., are a thoughtfully designed, single-piece aeration solution that both eliminates risks of backflow-related damage and promotes efficient, whole-oftank mixing for suspended substances in wastewater. The device’s sturdy, maintenance-free construction is designed for longevity as well as seamless re-circulation after lapses in airflow.

The ProFlex™ 730CBD is available in diameters ranging from 1.5” to 4” to meet the needs of any size and type of tank, accommodating airflow rates up to 40 standard cubic feet per minute (scfm).

Standard components include EPDM or Neoprene elastomers, with other alternatives available by request, as well as a specialized “Hex” ¾” NPT stainless-steel nipple that enables a simple and safe sealing experience between the diffuser and the aeration manifold. Optional flow control orifice reducers are also available, which provide additional pressure moderation to optimize the performance of multiple diffusers installed along a single air-supply pipeline.

A diverse collection of aeration facilities located across North America have already adopted Proco’s duckbillequipped coarse bubble diffusers, enhancing performance while minimizing maintenance and repair needs.

PROCO Products, sales@procoproducts.com, www.procoproducts.com

Choosing the Ideal Elastomer The duckbill check valve’s unique design offers several advantages, but maximizing those benefits requires careful attention toward selecting optimal materials.

Such synthetic, rubber-like elastomers as ethylene propylene diene monomer (EPDM) and Neoprene are excellent candidates for duckbill valves, offering superb flexibility as well as unmatched durability. Not only do these elastomers reliably resist tears and abrasions, but also stand up to harsh acidic and alkali substances often present in wastewater. EPDM and Neoprene boast exceptional resistance to heat, a necessity in any device intended for prolonged contact with compressed air and fluids exposed to solar warmth, which can sometimes reach temperatures as high as 300°F or more.

As EPDM, Neoprene, and other state-of-the-art elastomers become more commonplace in industrial applications, many aeration system owners opt to retrofit existing bubble diffusers —typically made from thermoplastic polymers such as PVC or ABS — with separate, elastomeric check valves. However, prolonged use often causes these separate coverings to loosen their grip on the plastic diffusers and eventually pop off, floating into the tank and once again rendering the diffuser susceptible to backflow issues in the case of airflow loss. For that reason, the most failure-proof aeration systems integrate both the diffuser

VALVES

However, even in cases of sudden and extreme increases in the solids concentration of the process fluid, duckbill check valves eliminate these clogging risks by remaining closed until airflow returns. Diffusers placed along the bottom of the aeration pipe will discharge air directly toward the bottom of the tank once the blower or compressor comes back online without allowing entry by unwanted media.

The force of this discharge re-suspends accumulated solids and creates a complete overturn loop that quickly resumes the aeration process.

and the duckbill check valve into a single, elastomeric piece.

-STRO

NG-

MANUFACTURERS, SUPPLIERS & EXPORTERS OF

- PVC Pipes & Fittings - HDPE Pipes & Fittings - Steel Pipe & Fittings - Valves, Water Meters, & all related products Proud suppliers to the: Civil, Irrigation, Mining & Industrial Markets

www.sizabantu.com | expor ts@sizabantu.com

Pipes, Pumps and Valves Africa - Sep/Oct 2023

33

VALVES

Gas Control Valve regulates mass flows in fuel cell systems Purem by Eberspaecher aims to achieve clean and quiet mobility. In addressing the transformation of the automotive industry, the company is developing solutions for alternative drive technologies. With the Gas Control Valve (GCV), the exhaust specialist is now launching the first product for fuel cell systems.

Whether on the road or rail, in the air, or as part of stationary applications, hydrogen-based fuel cell systems are used in various ways. In addition to the fuel cell stack itself, a whole system such as this consists of further components – the so-called “Balance of Plant” components. Purem by Eberspaecher is expanding its product portfolio in this regard: Based on the exhaust specialist’s many years of expertise, the in-house developments of the Balance of Plant components ensure the whole system’s operation and optimize it with respect to output and service life time. The Gas Control Valve

(GCV) is the first product for fuel cell applications from Purem by Eberspaecher. The component is designed for use in all segments – take fuel cell-powered passenger cars, commercial vehicles, trains, mobile power generators, or off-highway vehicles, for example.

Purem by Eberspaecher is thus expanding its target segments and working closely with its customers to support application development.

Optimization of the whole system Hydrogen-based fuel cell systems need to deliver high efficiency and durability in all applications. The compactly designed Gas Control Valve developed by Purem by Eberspaecher is used to regulate mass flows within the system. In this way, it ensures the fuel cell is operated in a safe and efficient manner.

The component offers several functional variants: As a bypass valve, it partially or completely directs the airflow past system components and guides fresh air from the intake to the exhaust.

As an air regulator valve, it regulates the total pressure within the system. Continuously adjustable valve positions contribute to the versatile nature of the Gas Control Valve.

The two-piece cover opens quickly and has a high flow cross-section of up to 65 millimeters, ensuring lowpressure losses at a high mass flow rate. If required, even larger cross-sections can be implemented. This allows fuel cell systems to be operated efficiently and safely.

An experience-based advantage in exhaust technology When it comes to valve technology, Purem by Eberspaecher draws on its expertise in exhaust technology that enables passenger car and commercial vehicle manufacturers to comply with stringent emissions and acoustics legislation. For the development of the Gas Control Valve, the AVG2 acoustic valve served as the basis.

With respect to the series production of passenger cars, it facilitates compliance with the upcoming third phase of acoustics legislation enforced in Europe. In addition to the available expertise, existing production capacities are used to manufacture the Gas Control Valve: The new component is manufactured with minor adaptations in the same plant as the AVG2 acoustic valve, thus supporting the transformation.

EB-Purem-Gas-Control-Valve

Eberspächer Group, +49 711 939-0250, press@eberspaecher.com, www.eberspaecher.com

VAC-CENT SERVICES (PTY) LTD

NASH VECTRA XL VACUUM PUMPS & COMPRESSORS

FEATURES Compact Design Extended Pressure Ratings Conical Design One Moving Part Variable Port Design Patented Gas Scavenging Improved Cone Angle 2 Year Warranty

NASH Vectra XL vacuum pumps and compressors are created to meet exacting performance and design standards. They combine the highest standard of reliability BENEFITS with a new level of ingenuity.

Less Floor Space Required Gardner Denver Nash Flexibility & Easy Maintenance employs advanced design Ability to handle applications where Backpressure is required technologies to achieve Ability to handle water /partculate sluge/ optimum performance and residuel Gas Compression Trouble free Start-Up & Operation unprecedented production Extended Scope of Application efficiencies.

Performance at High Vacuum Levels Long Term Reliability Peace of Mind

info@vaccent.co.za +27 11 827 1536

124 | Snapper Road, Wadeville

How dosing ratios affect the cost of chemical use over time

Operational managers want to get the best value possible from their maintenance supplies. When it comes to steam boiler chemicals and other water treatment solutions, it might seem like the best value is based on the price per kilogram or litre of a can of chemicals.

WATER

However, this is not always accurate because how long chemical supplies last, and their ultimate cost, also depends on the recommended dosing ratio.

Anelia Hough, water treatment consultant at Allmech, leading South African manufacturer of boilers and supplier of water treatment components, says it’s a mistake to only focus on the immediate price per can of chemicals and to not consider the cost of the chemicals over time. “The cost of chemicals for a boiler over time depends on several factors, such as the type of boiler, the type of chemicals used, the frequency of use, and the amount of chemicals used (dosing rate per kilogram of steam),” she says.

Chemicals used for steam boilers include oxygen scavengers, phosphates, polymers and alkalinity builders/ pH boosters. The cost of these chemicals varies depending on the quality, the type of chemical and the amount used.

Effective chemical water treatment should prevent scale and corrosion in the feedwater, and steam condensation in the system and boiler.

The correct dosing ratio is important for several reasons.

First, it ensures that the chemicals are being used effectively and efficiently. Using too little of a chemical can result in poor water quality and increased maintenance costs. In the same way, using too much of a chemical can result in over-treatment and increased operating costs.

Second, dosing ratios have a direct impact on the monthly running cost of a boiler. A chemical may be more expensive per can, but if it has a lower dosing ratio than an equivalent-sized can that requires more of the chemical per litre to work effectively, the more expensive can is actually the cheaper option once the running costs are factored in.

Label guidance Chemicals legally have to include their dosing information on their packaging, and using this information correctly is a key part of managing the overall cost of a particular chemical.

In an economic climate where everyone is having to carefully balance costs, it may not necessarily pay in the long term to buy what seems to be a lower priced can of chemicals – especially when the dosing rate is factored in.

Looking at the bigger picture “It is important to note that the cost of chemicals is just one aspect to consider when assessing the costs of boiler maintenance. Other factors include enhanced operational performance, lower total operating costs, reducing the risk for downtime/technical issues, labour costs, equipment costs, downtime cost and energy costs,” adds Hough.

Allmech recently helped a holiday resort that was struggling to get the right pH levels in the boilers heating its pool water and that had installed a demineralisation plant that it ultimately did not need.

“The customer operates two different size boilers for its operations. An 8-ton steam boiler for summer and a 10-ton steam boiler for winter. In essence, hot water is supplied to two sections of the holiday resort via heat exchangers – the open big pools and the indoor hot pools – that need a constant temperature of between 26 and 28°C,” says Hough.

After assessing the setup, it was clear that the incorrect chemical water treatment was being used for the boilers.

By solving the treatment issue, it became clear that the expensive-to-operate demineralisation plant was no longer necessary. In fact, the plant had been hindering the system by reducing the pH levels to concerningly low levels.

Eliminating the need for the demineralisation plant and getting the right quality chemicals at the correct dosing rate for the boilers’ maintenance saved the resort around R90 000 and over 171 000 litres of water each month.

Allmech, +27 (0) 11 849 2731, lionelm@allmech.co.za, www.allmech.co.za

36

Pipes, Pumps and Valves Africa - Sep/Oct 2023

NON-RETURN VALVE SPECIALISTS SINCE 1969

NEW 4TH GENERATION LONG LIFE VALVES AND FOOT VALVES REMAIN DROPTIGHT FOR DECADES Applications

• Slurries, mine drainage, clean water, acids, Alkalines, etc • Pressure ranges: 1mm H2O up to 120 bar • River water, leaves, stones, twiggs, mine bilge water etc ok • No high density fibre: sewage, paper pulp

Features

• Durable diaphragm 20mm thick: the only moving and wearing part • Replace on site – minimum production downtime • Unlimited 24 month guarantee – expect 20 to 30 years to first maintenance • Market segment: users who want to purchase once in a lifetime

100% MANUFACTURED IN NORTHERN CAPE

+27 84 606 0425 / stelkon@heckroodt.co.za

INDUSTRY NEWS

The Big 6 level measurement technologies, where to use them and why

Anyone who’s ever worn a tool belt knows that sometimes you have to use a tool for something it’s not designed to do. If you don’t happen to have a hammer, a heavy wrench will work in a pinch. But of course, the job will be done more effectively when you use the right tool.

When it comes to measuring the level of materials in a tank or other vessel, there are many tools you can choose from.

Some are clearly better suited to certain applications, but in many cases, the best level measurement technology for the job can be hard to identify. Understanding the mostcommon types of fluid-level-measurement technology will help you make a good choice and select the right measurement tool for the job.

Level-measurement applications Knowing the amount of liquid contained in a tank is an essential piece of data in almost every process and production operation. That information is primarily needed to fill one of five requirements:

38

The second question is, “Do you need continuous or pointlevel measurement?” We will narrow the focus for our exploration to only continuous-level technologies.

Within the universe of continuous-level measurement of liquids, there are six commonly-used meter types: • Differential pressure • Ultrasonic • Guided Wave Radar • Laser • Magnetic level gauges • Magnetostrictive Let’s look at each of them, how they work, and what applications they’re best suited to.

• Inventory control: Ensure purchasing and stocking the optimum volume of material • Process efficiency: Maintain appropriate levels of materials to optimize production processes and use storage options most efficiently.

• Safety: Avoid overfills/overflows to prevent injury, environmental issues and need for cleanups.

• Consistent supply: Have the required volume of materials to meet production or customer demands without interruption • Custody transfer: Meet commercial and legal requirements for accurate measurement of transferred materials.

The Big 6 fluid-level measurements Differential pressure This is probably the oldest, most trusted, and commonly used level-measurement method for liquids and liquefied gases in both open and closed tanks, including pressurized tanks. The meter typically includes a stable body and a diaphragm with a sensor to measure the pressure exerted by a column (or head) of liquid in the vessel.

The diaphragm is deflected by the pressure differential, changing the electrical property of the sensor and creating a proportional electrical signal. The sensor could be one of many different types.

Technology considerations When choosing the potential technology for an application, the first question to answer is, “Are you measuring solids or liquids?” There are some meter types able to work with both types of materials, and others uniquely applicable to one medium or the other. We will focus only on liquidmeasurement application.

Calculating the value of the signal requires a bit of math that includes three variables: pressure, density (specific gravity), which must be entered as a constant, and the measured product height or level.

Pipes, Pumps and Valves Africa - Sep/Oct 2023

In open tanks, the meter calculates the differential between atmospheric pressure and fluid pressure. In closed tanks, it calculates the difference between the low-

side, blanket pressure and the fluid pressure. In both cases, accurate level calculations depend on knowing the fluid density.

Advantages • Most versatile and widely used technology • Indirect, contact measurement • Simple design with low purchase cost • Configurable with a variety of options to suit application • Externally installed or retrofitted to existing vessel Limitations • Measurement affected by changes in specific gravity/ density • Mounting constraints / limited flexibility compared to other technologies • Higher total cost of ownership considering periodic calibration and maintenance • Require two vessel penetrations in closed tanks, creating leak potential Ultrasonic This technology relies on sound waves to determine material level by gauging the distance between a topoftank transducer and the surface of the material, whether liquid, solid, or slurry. The transducer emits short ultrasonic impulses (sound waves) that represent mechanical energy.

The waves bounce off the top of the material like an echo and return to the transducer, which calculates the “time of flight” to determine the height of the material in the tank. The transducer emits a relatively narrow beam, so obstructions in the tank typically don’t impair its applicability or accuracy.

Like the differential pressure meter, ultrasonic technology has been in use for decades and is another old and proven technology. Due to inherent limitations of ultrasonic measurement, this technology is used primarily in water/ wastewater and aggregate applications.

Unlike the differential pressure gauge, there is no bottom penetration in the tank, and therefore no risk of leaks. The ultrasonic meter is also unaffected by changes in material density or specific gravity. However, because sound waves can’t travel in a vacuum, ultrasonic meters can’t be used in vacuum or reduced-pressure vessels. And accuracy can be There are two general types of ultrasonic meters. The integrated version encompasses both the sensor and the electronics in a single, compact instrument. There is also a remote version that separates the two components, enabling remote level monitoring.

Advantages • Proven, widely used • Indirect measurement

INDUSTRY NEWS

In applications where density changes, more sophisticated meters must be used. These multivariable meters accommodate dynamic liquid density by compensating the calculated density based on a fourth variable. For liquid and wet-leg applications, the meter includes a temperature probe, decreasing the calculated density as the temperature increases. For steam applications, the fourth variable is determined based on static-pressure tables.

Multivariable sensors may require multiple penetrations points in the tank.

• Acoustic, non-contact with no moving parts • Simple and cost-effective • Unaffected by changes in product density, composition, moisture content, electrical conductivity, or dielectric constant • Narrow beam angle minimizes effect of obstructions • Lower-cost alternative to radar / laser • Not affected by material dust Limitations • Dirt, irregular and sloped material surface affect measurement accuracy • Affected by many interferences • Doesn’t provide high repeatability • High pressure and/or temperature affects meter accuracy • Weak echo, and reduced accuracy, due to disperson and/ or absorption of material (e.g. foam) • Vapor and condensate can create false echoes affected by the dispersion and absorption properties of the liquid.

Foam, for example, can create false reflections.

Laser This is one of the latest advancements in levelmeasurement technology. It’s really only in the last five or six years that it’s become a mature, reliable technology.

Like the ultrasonic meter, a laser is also mounted at the top of the vessel pointing down. But instead of emitting a sound wave, the laser emits a flash of light. The light is reflected back from the surface of the material to the meter where it is detected by an optical receiver. The distance is calculated based on the time it takes for the light to travel to the surface and back to the instrument.

Compared to the sound pulse of an ultrasonic meter, the laser beam is significantly narrower. With virtually no beam spread (0.2 degrees), it’s possible to find an appropriate mounting location that will ensure consistent, reliable readings even in tanks with many obstructions. The laser emitter can be mounted anywhere on the tank lid, including along the tank wall. Ultrasonic and radar systems work best when centered at the top of the tank. Laser technology also works well in narrow tanks, something else that gives ultrasonic and radar meters trouble.

Pipes, Pumps and Valves Africa - Sep/Oct 2023

39

INDUSTRY NEWS

This is a universal measurement technology, used for both liquids and solids. It can also be used for positioning applications and on conveyor belts. Its versatility makes it applicable in many applications and industries. That versatility comes at a cost, though. Compared to ultrasonic, laser is significantly more expensive.

Advantages • Indirect measurement • Non-contact • Very high update rates are achievable; no “lock-in” issue sometimes experienced with ultrasonic meters • Effective in both very narrow (down to 2”) and deep tanks (330 ft. for liquids, 650 ft. for solids) • Not affected by material density • Works with solid or liquid materials Limitations • Costlier than ultrasonic • Not suitable for interface measurement • Not applicable for environments where dust or other suspended material will interfere with laser beam • Doesn’t work well with shiny materials or when foam is present Guided wave radar (GWR) With this technology, also called time-domain reflectometry (TDR), the meter is mounted on the top of the tank or chamber with a probe that usually extends the full depth of the vessel. A low-energy pulse of microwaves is sent down the probe. When the pulse reaches the liquid level (the air/liquid interface), a significant amount of the microwave energy is reflected back up the probe to the transmitter. As with most other meter types, the time delay between the transmitted and received echo signal is used to calculate the distance to the liquid surface.

This reflective action depends on the liquid’s dielectric value. High-dielectric liquids reflect the entire pulse, providing reliable, accurate measurement. Low-dielectric material doesn’t adequately reflect the pulse, resulting in

inaccurate readings. Some advanced meter designs can overcome this issue.

This lack of complete reflection can be capitalized on to provide interface measurement in tanks containing two liquids with different dielectric properties. That makes it possible to measure both total level and the interface with a single meter.

Emulsion layers create an indistinct boundary between atmosphere and liquid, making GWR a poor choice in these applications. However, instruments supported with appropriate algorithms can overcome some of these challenges.

Unlike laser meters, which simply assess the speed of the beam return, GWR meters actually assess both the speed and the waveform of the reflected signal. The signal must therefore be properly tuned during commissioning to ensure accuracy.

Advantages • Unaffected by changes in pressure, temperature, density, conductivity, etc.

• Contact type • No moving parts • Unaffected by dense fog, dust or steam, and by high pressure or temperature • No beam-angle issue: Works even with difficult tank geometry or interfering obstacles • Can be used with liquids, sludges, slurries, and some solids Limitations • Commissioning requires special expertise • Sensitive to build-up on the probe • Challenging to measure interface with emulsion/rag layer Magnetic level gauge (MLG) Aside from putting a graduated stick in the top of a tank to measure fluid level, the sight glass is probably the oldest and simplest of all level-measurement approaches. The major drawbacks to using a sight glass are safety and maintenance concerns. The MLG mimics the approach of a sight glass in a safer, more reliable way that provides a simple but powerful approach to measure liquids.

An MLG system includes a sealed float enclosing a magnetic ring housed in a non-magnetic float chamber.

The float moves up and down in the tank as the liquid level rises or falls. Outside the vessel, a highly visible magnetic “shuttle” is contained in a separate, sealed glass tube. As the tank level increases and the float rises, the shuttle moves in unison. This provides a continuous, highly visible indication of liquid level.

Compared to a sight glass, this gauge has fewer potential leak points and lower maintenance. There are no tank penetrations required. While the basic design provides only local, visual indications, a transmitter can be added for remote monitoring.

Advantages • Requires no power • Simple design and purchasing, with piping drawings reduced to equipment specification schedules • Often used in high temperature, high-pressure or toxic/

40

Pipes, Pumps and Valves Africa - Sep/Oct 2023

Magnetostrictive (MR) This is a relatively unknown technology compared to the others discussed above, but it offers some unique benefits, including the highest accuracy (1mm) and resolution.

It also provides four measurements: level, interface, temperature, and ullage.

An MR gauge can be configured in two ways.

• A probe is directly inserted in the tank with a magnetic floating ring that moves up and down on the probe.

(Intrusive) • A vertical, metal column or chamber is attached to the tank with connections at the top and bottom, configured like a sight glass but without the ability to directly view the liquid in the column. Instead, a magnetic float moves up and down in the column. The probe is positioned outside and parallel to the column. (Non-intrusive) In both designs, the meter generates low-energy pulses of current through the probe. These pulses create a magnetic field that interacts with the float. The resulting torsional waves travel through the sensor wire at a known velocity, enabling calculation of the liquid level.

It’s possible to include multiple floats, enabling measurement of both the upper level and interface layer.

Compared to other technologies, this provides superior interface measurement. The second float can be designed specifically to the application providing accuracy even with

As part of the dynamic EMVAfrica group, EnergyValves is positioned as more than a supplier of valves, we offer complete solutions.

EnergyValves’ range of stainless steel valves is sourced from reputable and highly certified manufacturers and suppliers with proven track records. The division is focused on establishing long-term relationships with suppliers and regularly audits their quality standards as well as provides material and pressure test certificates with all valve products.

With stainless steel valves forming the bulk of the range offered, the division also offers valves in duplex stainlesssteel valves, titanium valves, 904L valves, nickel alloys valves as well as numerous other high performance alloys.

The company’s comprehensive valves portfolio includes a range of ball valves, knife gate valves, wedge gate valves, butterfly valves, check valves, needle valves, and pressure relief valves. In addition to stainless steel valves, EnergyValves also supplies valves in lower steel grades such as carbon steels, division also holds extensive stock of the most commonly used valves in corrosion resisting

emulsions.

While the non-intrusive mount requires additional components and engineering, the payoff is both higher safety and lower maintenance, making it the most common and attractive solution.

Advantages • Only moving part is the very low maintenance float • Unaffected by process conditions: foam, emulsion, mist, gas layering, dust, dielectric value, temperature, etc.

• No maintenance or calibration • Best technology for interface measurement • Lower total cost of ownership Limitations • Float movement affected by high-viscosity or sticky liquids • Length limited to 75ft (22m), less than other technologies.

• Floats designed for specific application

INDUSTRY NEWS

corrosive environments.

• Longer life compared to electronic measurement techniques • Low total cost of ownership Limitations • Affected by changes in specific gravity • Movement of the in-tank float can be affected by highviscosity or sticky liquids • Completely customized solution, increasing purchase cost

Making the right technology choice This overview of level measurement provided you with a good foundation for selecting the right technology for your application. Still, it’s obvious that this can be a complicated selection process.

It’s typically prudent to contact vendors offering these technologies to gain further insight into their specific product capabilities, measurement accuracies, pricing, etc. to ensure you have all the facts as you make your decisions.

ABB, +27 (0) 10 202 5000, contact.center@za.abb.com, www.new.abb.com alloys. EnergyValves complements its extensive valve range with a valve actuation service. The division has a fully equipped workshop stocked with a range of pneumatic double-acting/spring return actuators. Together with a comprehensive service offering including valve repairs, servicing and technical advice Accessory Options: NAMUR solenoid, mechanical limit switch, electro-pneumatic/smart positioner.

EMV Africa, +27 (0) 11 466 1926, sales@emvafrica.co.za, www.emvafrica.co.za Pipes, Pumps and Valves Africa - Sep/Oct 2023

41

We wanted to take a moment to thank all sponsors at our Golf Day. Your support and partnership played a key role in the success of our event, and we appreciate your continious support.

PUMPS AIR OPERATED DOUBLE DIAPHRAGM PUMPS

FIRE PUMPS

Sulzer Pumps (South Africa) (Pty) Ltd T: +27 (0) 11 820 6000 F: +27 (0) 11 820 6206 E: CSSEnquiries@sulzer.com W: www.sulzer.com

Air & Vacuum Technologies

T: +27 (0) 11 318 3241/2/3/4 C: +27 (0) 82 576 9373 E: burnm@vactech.co.za W: www.vactech.co.za

DEWATERING PUMPS

Integrated Pump Rental C.R.I Pumps S.A. (Pty) Ltd

T: +27 (0) 11 805 8631 F: +27 (0) 11 805 8630 E: cri-za@crifluidsystems.com W: www.cripumps.co.za HIGH PRESSURE PUMPS

KSB (Pty) Ltd

Sulzer Pumps (South Africa) (Pty) Ltd Monitor Pumps and Systems T: +27 (0) 11 618 3860 E: info@monitorpumps.co.za W: www.monitorpumps.co.za

T: +27 (0) 11 820 6000 F: +27 (0) 11 820 6206 E: CSSEnquiries@sulzer.com W: www.sulzer.com

BOOSTER PUMPS

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

KSB (Pty) Ltd Pumps for Africa

T: +27 (0) 10 594 0335 E: info@pumpsforafrica.co.za W: www.pumpsforafrica.co.za

T: +27 (0) 11 894 2906 E: admin@pumprental.co.za W: www.pumprental.co.za

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com END SUCTION PUMPS

BOREHOLE PUMPS

SAM Engineering

T: +27 (0) 11 823 4250 F: +27 (0) 11 823 4943 E: sales@sameng.co.za W: www.sameng.co.za

Hawk High Pressure Pumps T: +27 (0) 31 274 8555 T: +27 (0) 11 822 4039 E: sales@hawkpumps.co.za W: www.hawkpumps.co.za

HORIZONTAL SPLIT CASE PUMPS

Sulzer Pumps (South Africa) (Pty) Ltd T: +27 (0) 11 820 6000 F: +27 (0) 11 820 6206 E: CSSEnquiries@sulzer.com W: www.sulzer.com

MAGNETIC PUMPS

Ernest Electro Engineering T: +27 (0) 11 792 9550 E: eeeaman@mweb.co.za W: www.ernestee.co.za

Aquaplex Pumps

T: +27 (0) 76 476 4084 E: gavin@aquaplexpumps.co.za

Stewarts & Lloyds (Pty) Ltd

T: +27 (0) 11 917 0778 F: +27 (0) 11 917 0769 E: pipesandfittings@sltrading.co.za W: www.stewartsandlloyds.co.za CENTRIFUGAL PUMPS

Atlas Copco

T: +27 (0) 11 821 9854 E: david.stanford@atlascopco.com W: www.atlascopco.com

KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822-2013 E: info-za@ksb.com W: www.ksb.com

AESPUMP SA

T: +27 (0) 17 631 1003 F: +27 (0) 17 631 1002 E: craigg@aespump.co.za W: www.aespump.co.za

Integrated Pump Rental

T: +27 (0) 11 894 2906 E: admin@pumprental.co.za W: www.pumprental.co.za

SAM Engineering

T: +27 (0) 11 823 4250 F: +27 (0) 11 823 4943 E: sales@sameng.co.za W: www.sameng.co.za

T: +27 (0) 17 631 1003 F: +27 (0) 17 631 1002 E: craigg@aespump.co.za W: www.aespump.co.za MULTISTAGE PUMPS

APE Pumps

T: +27 (0) 11 824 4810 F: +27 (0) 11 824 2770 E: info@apepumps.co.za W: www.apepumps.co.za

KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

AESPUMP SA

C.R.I Pumps S.A. (Pty) Ltd

T: +27 (0) 11 805 8631 F: +27 (0) 11 805 8630 E: cri-za@crifluidsystems.com W: www.cripumps.co.za

Monitor Pumps and Systems T: +27 (0) 11 618 3860 E: info@monitorpumps.co.za W: www.monitorpumps.co.za

Pipes, Pumps and Valves Africa - Sep/Oct 2023

43

PUMPS SELF PRIMING PUMPS

Sulzer Pumps (South Africa) (Pty) Ltd T: +27 (0) 11 820 6000 F: +27 (0) 11 820 6206 E: CSSEnquiries@sulzer.com W: www.sulzer.com

PERISTALTIC PUMPS

VERTICAL SPINDLE PUMPS

KSB (Pty) Ltd C.R.I Pumps S.A. (Pty) Ltd

T: +27 (0) 11 805 8631 F: +27 (0) 11 805 8630 E: cri-za@crifluidsystems.com W: www.cripumps.co.za

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com VACUUM PUMPS

Walter Meano Engineering VersaFlo VSE Pumps T: +27 (0) 11 873 8620 F: +27 (0) 11 825 1401 E: wme@mweb.co.za W: www.versaflo.co.za

VERTICAL TURBINE PUMPS

Air & Vacuum Technologies

T: +27 (0)11 318 3241/2/3/4 C: +27 (0) 82 576 9373 E: burnm@vactech.co.za W: www.vactech.co.za

Integrated Pump Rental

T: +27 (0) 11 894 2906 E: admin@pumprental.co.za W: www.pumprental.co.za SLURRY PUMPS

PIPES

Air & Vacuum Technologies

T: +27 (0)11 318 3241/2/3/4 C: +27 (0) 82 576 9373 E: burnm@vactech.co.za W: www.vactech.co.za

Africa Slurry Pump Solutions Umulig Engineering

T: +27 (0) 79 402 3662 E: pierre@africasps.com W: www.AfricaSPS.com

T: +27 (0) 31 942 0489 E: info@umulig.co.za W: www.umulig.co.za PLUNGER PUMPS

Hawk High Pressure Pumps T: +27 (0) 31 274 8555 T: +27 (0) 11 822 4039 E: sales@hawkpumps.co.za W: www.hawkpumps.co.za

POSITIVE DISPLACEMENT PUMPS

SUBMERSIBLE PUMPS

T: +27 (0) 11 856 0650 C: +27 (0) 63 686 0869 E: reeza.hoosen@busch.co.za W: www.buschvacuum.com

Sulzer Pumps (South Africa) (Pty) Ltd T: +27 (0) 11 820 6000 F: +27 (0) 11 820 6206 E: CSSEnquiries@sulzer.com W: www.sulzer.com

WASTEWATER PUMPS

Integrated Pump Technology T: +27 (0) 11 824 4810 E: info@pumptechnology.co.za W: www.pumptechnology.co.za

Africa Slurry Pump Solutions

Africa Slurry Pump Solutions T: +27 (0) 79 402 3662 E: pierre@africasps.com W: www.AfricaSPS.com

uality

T: +27 (0) 79 402 3662 E: pierre@africasps.com W: www.AfricaSPS.com

VAC-CENT SERVICES (PTY) LTD.

VAC-CENT SERVICES (PTY) LTD T: +27 (0) 11 827 1536 F: +27 (0) 11 824 3590 E: info@vaccent.co.za W: www.vaccent.co.za

VERTICAL SUMP PUMPS

Monitor Pumps and Systems T: +27 (0) 11 618 3860 E: info@monitorpumps.co.za W: www.monitorpumps.co.za

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

Busch Vacuum Solutions Africa

KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

KSB (Pty) Ltd

Aquaplex Pumps

KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com WELL PUMPS

T: +27 (0) 76 476 4084 E: gavin@aquaplexpumps.co.za

KSB (Pty) Ltd Unique Engineering

T: +27 (0) 11 826 6111 F: +27 (0) 11 826 6162 E: sales@uniqueeng.co.za W: www.uniqueeng.co.za 44

Integrated Pump Technology T: +27 (0) 11 824 4810 E: info@pumptechnology.co.za W: www.pumptechnology.co.za

Pipes, Pumps and Valves Africa - Sep/Oct 2023

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

VALVES BALL VALVES

CHECK VALVES

VESCONITE

MAKES VALVES

Enserve Engineering Services (Pty) Ltd

Pleix-Quip

T: +27 (0) 11 736 4994 C: +27 (0) 83 461 0801 E: tiaans@pleixquip.co.za W: www.pleixquip.co.za

Ainsworth Valves

T: +27 (0) 10 020 8388 E: sales@ainsworthvalves.com W: www.ainsworthvalves.com

T: +27(0) 16 971 3385 F: +27(0) 16 971 3935 E: mail@enserve.co.za W: www.enserveonline.com

LAST LONGER

C

M

Y

BUTTERFLY VALVES

CM

MY

Hydromine Hydromine

T: +27 (0) 11 608 4292 E: sales@hydromine.biz W: www.hydromine.biz

Ainsworth Valves

T: +27 (0) 10 020 8388 E: sales@ainsworthvalves.com W: www.ainsworthvalves.com

Seapro SA Invincible Valves (Pty) Ltd

(PTY) LTD

Asahi Africa

Boksburg Branch: T: +27 (0) 11 397 4353 F: +27 (0) 11 397 4368 E: info@asahi-africa.com W: www.asahi-africa.com

Asahi Africa

Durban Branch: T: +27 (0) 31 563 3923 F: +27 (0) 31 563 3929 E: joshua@asahi-africa.com W: www.asahi-africa.com

CY

T: +27 (0) 11 608 4292 E: sales@hydromine.biz W: www.hydromine.biz

T: +27 (0) 11 822 1777 F: +27 (0) 11 822 3666 E: enquiries@invalve.co.za W: www.invalve.co.za

T: +27 (0) 11 397 1126 T: +27 (0) 10 109 2703 E: info@seaprosa.co.za W: www.seaprosa.co.za

www.vesconite.com Call: +27 11 616 1111

DIAPHRAGM VALVES

Invincible Valves (Pty) Ltd Macsteel Fluid Control

T: +27 (0) 82 495 2772 C: +27 (0) 11 383 4000 E: Rowan.Blomquist@macfluid.co.za W: www.macsteel.co.za

T: +27 (0) 11 822 1777 F: +27 (0) 11 822 3666 E: enquiries@invalve.co.za W: www.invalve.co.za

T: +27 (0) 11 608 4292 E: sales@hydromine.biz W: www.hydromine.biz

Seapro SA KSB (Pty) Ltd

T: +27 (0) 10 007 3222 E: sales@bray.com W: www.bray.com

K

Hydromine

Pleix-Quip Bray Controls Africa

CMY

T: +27 (0) 11 736 4994 C: +27 (0) 83 461 0801 E: tiaans@pleixquip.co.za W: www.pleixquip.co.za

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

T: +27 (0) 11 397 1126 T: +27 (0) 10 109 2703 E: info@seaprosa.co.za W: www.seaprosa.co.za

FLOW CONTROL VALVES

VACSERVE (PTY) LTD Seapro SA KSB (Pty) Ltd

T: +27 (0) 11 876 5600 F: +27 (0) 11 822 2013 E: info-za@ksb.com W: www.ksb.com

T: +27 (0) 11 397 1126 T: +27 (0) 10 109 2703 E: info@seaprosa.co.za W: www.seaprosa.co.za CONTROL VALVES

(PTY) LTD

Asahi Africa

Boksburg Branch: T: +27 (0) 11 397 4353 F: +27 (0) 11 397 4368 E: info@asahi-africa.com W: www.asahi-africa.com

T: +27 (0) 11 827 1536 F: +27 (0) 11 827 3590 E: info@vacserve.co.za W: www.vacserve.co.za GATE VALVES

Asahi Africa KV Controls (Pty) Ltd

T: +27 (0) 16 100 4592 E: fred@kvcontrols.co.za W: www.kvcontrols.co.za

Bray Controls Africa

T: +27 (0) 10 007 3222 E: sales@bray.com W: www.bray.com

Durban Branch: T: +27 (0) 31 563 3923 F: +27 (0) 31 563 3929 E: joshua@asahi-africa.com W: www.asahi-africa.com

Ainsworth Valves

T: +27 (0) 10 020 8388 E: sales@ainsworthvalves.com W: www.ainsworthvalves.com

Pipes, Pumps and Valves Africa - Sep/Oct 2023

45

VALVES THERMOSTATIC CONTROL VALVES

Invincible Valves (Pty) Ltd T: +27 (0) 11 822 1777 F: +27 (0) 11 822 3666 E: enquiries@invalve.co.za W: www.invalve.co.za

Valcon Valve & Controls

T: +27 (0) 11 453 7537 E: valconsa@iafrica.com W: www.valcon.co.za

ADVERTISE WITH US TODAY !!

VACSERVE (PTY) LTD

T: +27 (0) 11 827 1536 F: +27 (0) 11 827 3590 E: info@vacserve.co.za W: www.vacserve.co.za VALVE RECONDITIONING

KNIFE GATE VALVES

Enserve Engineering Services (Pty) Ltd

C.R.I Pumps S.A. (Pty) Ltd

T: +27 (0) 11 805 8631 F: +27 (0) 11 805 8630 E: cri-za@crifluidsystems.com W: www.cripumps.co.za

T: +27(0) 16 971 3385 F: +27(0) 16 971 3935 E: mail@enserve.co.za W: www.enserveonline.com

Mine Track & Tools (Pty) Ltd Mine Track & Tools (Pty) Ltd

T: +27 (0) 11 412 4536/1665 E: info@minetrack.co.za W: www.minetrack.co.za

T: +27 (0) 11 412 4536/1665 E: info@minetrack.co.za W: www.minetrack.co.za

PRESSURE REDUCING VALVES

Seapro SA

T: +27 (0) 11 397 1126 T: +27 (0) 10 109 2703 E: info@seaprosa.co.za W: www.seaprosa.co.za VALVES FOUNDRY

CALAFRICA Hydronic Solutions T: +27 (0) 11 795 1519 C: +27 (0) 83 303 1437 E: technical@calafrica.co.za W: www.calafrica.co.za

KEW Foundries Hydromine

T: +27 (0) 11 608 4292 E: sales@hydromine.biz W: www.hydromine.biz

T: +27 (0) 53 841 0474 F: +27 (0) 53 841 0473 E: info@kewfoundries.co.za W: www.kewfoundries.co.za

Ukuthela Foundry Projects Seapro SA

T: +27 (0) 11 397 1126 T: +27 (0) 10 109 2703 E: info@seaprosa.co.za W: www.seaprosa.co.za 46

T: +27 (0) 12 719 8860 E: ukuthela@live.co.za

Pipes, Pumps and Valves Africa - Sep/Oct 2023

+ 27 (0) 87 700 9834 sales@pumpsandvalves.co.za www.pumpsandvalves.co.za

5

TH

YOUR PUMP & DREDGING SPECIALIST

We cater for all sectors of industry including underground and surface mining, quarrying, construction, wastewater, energy, petrochemical, oil and gas, engineering, agriculture and general industry across Africa.

We are known for our agility with a proven track record of offering customers quick and easy access to a comprehensive range of dewatering pumps, heavy duty slurry handling pumps, dredging and hydro mining solutions either for outright purchase or rental.

Small Portable Pump Sets

Submersible Dewatering Pumps

Diesel Driven Dewatering Pump Sets

Our small portable pump sets are lightweight and easy to move on site yet engineered for the toughest applications. Available in petrol, diesel or electric drive.

Submersible pumps are an effective, inexpensive solution for dewatering whether on an opencast mine or quarry site, in an underground mine, on a construction site or anywhere else that dewatering needs to be done.

Our self-priming diesel driven pump sets are suitable for dewatering applications where power is not readily available.

Available as standard import or as local custom engineered.

SlurrySucker Dredging Solution

Hydro Mining Solutions

Heavy Duty Slurry Handling Solutions

The SlurrySucker Dredging System is suitable for the regular cleaning of process water ponds, return water dams or other water storage areas. It is also ideal for dredging and cleaning water capture areas where silt or slimes is an issue or where water retention and water holding capacity is being threatened.

The locally manufactured SlurryBlaster is purpose-engineered for removal of slurry and sediment accumulation on dam walls and inside dams. It will assist mines with on-going maintenance. It offers mining and plant operations a cost effective cleaning tool for all applications where slurry has become an issue and needs to be washed away.

Heavy duty slurry handling solutions from global supplier, Toyo provide high performance pumping of slurries including those with solids that have settled out of fluid suspension. Toyo heavy duty slurry pumps move material in applications not previously considered pumpable.

Tel: +27 87 759-8654 admin@pumprental.co.za www.pumprental.co.za 49B Bisset Road, Jet Park, Boksburg, 1459, South Africa