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There is probably not a single river of any importance in South Africa whose waters do not, at some point or another, flow through an Ainsworth valve.

Submersible Pumps - A viable option Locally manufactured quality Bermad products

JAN/FEB 2019

Mine Track & Tools serves as the single most influential valve company to the mines that mine the Great Gold Reef running through the Witwatersrand Basin.


Vincent Mulder +27 79 517-4489 vincent@minetrack.co.za

info@minetrack.co.za +27 11 412-4536 www.minetrack.co.za

CONTENT COVER STORY The evolution of tradition




SAPSDA and SASSDA join forcesElectra Mining Report Back


Kingsley Duba pledges continued support for VAMCOSA members


JAN/FEB 2019

There is probably not a single river of any importance in South Africa whose waters do not, at some point or another, flow through an Ainsworth valve.

PUMPS Ernest Electro Engineering leaders in pumping solutions


Tips for selecting dewatering pumps


The history of pumps: The journey and evolution through the years


Complete filling station construction solutions


Submersible Pumps - A viable option


Atlas Copco has completed its portfolio of WEDA electric submersible dewatering pumps


Robust Grindex Bravo slurry pumps offer what Africa needs


Submersible Pumps - A viable option Locally manufactured quality Bermad products

On the cover

Ainsworth Engineering / UVC Tel: +27 (0) 11 433 3968 Email: sales@uvc.co.za Web: www.uvc.co.za

Pumps & Valves Africa

Ground Stabilization Work on Reclaimed Land for a New Airport Runway 21 New tensioning pumps launched


KSB expands its aftermarket services


VALVES Innovation Award for Mokveld’s Typhoon Valve System


Locally manufactured quality Bermad products


Introduction to Valves, What is a Valve?


Proven knife gate valves to withstand harsh slurries


PRODUCTS & SERVICES Wamechsi Group standardises on SEW solution for its wastewater-treatment equipment Total system focus

34 36

Emerson enables digital capture of plant conditions to drive faster operations and maintenance response


New SKF solution delivers benefits of condition monitoring to wider applications


PUMPS FAQs Rotodynamic Pumps




Managing Editor: Surita Marx Tel: +27 (0) 11 475-0010 Cell: +27 (0) 83 281-5761 Email: info@pumpsandvalves.co.za Web: www.pumpsandvalves.co.za Sales: Lusana Mrkusic Email: lusana@pumpsandvalves.co.za Sales: Kyle Rametsen-Spalding Email: info@pumpsandvalves.co.za

Advertisers Ainsworth Engineering / UVC OFC Air & Vacuum Technology 13,25 Cyclone Industries 27 Ernest Electro 11 Invincible Valves 31 IVS IBC KSB Pumps 15 Local Manufacturing Expo 19 Macsteel OBC Mine Track & Tools IFC PC Pump & Tank 23 PVP 33 Water Show 39 Watson Marlow 41


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 - Jan/Feb 2019


The evolution of tradition COVER STORY

Ainsworth Engineering has in recent months revived their historical footprint in manufacturing and supplying what must be a world recognized range of valves such as Resilient Seal Gate, more commonly known as the Ainsworth RSV and the Green Mamba, a market leader of resilient steel gate valves and the Grove Control valve, to mention but a few. Ainsworth Engineering and its sister company United Valve Company (UVC) are under new ownership and have been upgraded to Level 1 broad-based black economic empowerment (BBBEE) status. The 100% LOCAL MANUFACTURING and German technology which has ultimately been reflected in the robustness and longevity of the product. History has a habit of setting foundations from which elements evolve. Some die a natural death in time whilst others progress to further the course of human endeavor. The same can be said for certain valve manufacturers today, who have stood the test of time and continue to produce Local products that exude confidence in the markets in which they operate. Ainsworth Engineering established in 1943, can be largely considered to be one of these entities that continue to place a high emphasis on quality, which represents one of their prime objectives. With the establishment of good relationship with foundries at the time they were able to control the quality through all stages of manufacture. The company’s quality system is listed and certified by the South African Bureau of standards. Where applicable, cast iron and cast steel gates and reflex valves bear this SABS mark. Known also as United Valve Company (UVC), established in 2002 occupies some 7000 sq m of factory space on a 12000 sq m site in Robertsham, south of Johannesburg where the


Pipes, Pumps and Valves Africa - Jan/Feb 2019

latest tools and equipment are housed that provide stateof-the art finishes to the comprehensive range of valves produced by the company. An interesting fact is the company was the first in the industry to introduce and in-house electro-static plastics powder-coating (EPC) plant. The plant was installed to turn out valve components with a superior finish and outstanding abrasion and corrosion protection. This method surpasses the standard method of red oxide paint previously used. This is an added advantage

when one considers that most of the underground applications in the mining industry have a preference for the Ainsworth brand valves.


Flagship of the valve range however, is the Grove Surge Relief valve. These surge relievers and regulators have been protecting pipelines all around the world for over 40 years. When loaded with nitrogen, Grove valves can relieve fast acting transient surges. For overpressure conditions where pressure is building up steadily, or in cases where there are less demanding speed requirements, some models can be operated with a pilot and process fluid. A variety of materials are available to match each individual application. Some of the applications for Grove, include, loading/offloading terminals; farm tank storage; off-shore platforms; mines and refineries; power plants and pipelines. Many of the valves sold over this period are still in existence today. Ainsworth Engineering/United Valve Company has undergone some strategic changes in recent months, which has resulted in the company acquiring BBBEE Level one status, resulting in the appointment of Siyabonga Meyiwa as the new owner and CEO. As a Mechanical Engineer he has experience in water management, essential to the success of a company that has the reputation of providing water solutions to a vast industry. “We have received funding from the Industrial Development Corporation with a view to assisting with our expansion plans which include working capital and developing future markets, going forward. We have already commenced with the installation of new machines and refurbishment of existing ones that will improve efficiencies. We already have existing contracts supplying valves to Australia and New Zealand, which was established some time ago by the previous management and our sights are further firmly set

on strategic partnerships in order to expand into the African market as well,” says Siyabonga Meyiwa. “The footprint of UVC has previously been restricted to the Gauteng and mining areas of South Africa but we realize that with some forward planning we further establish facilities in the major centers of the country that cater for predominantly Municipal and private business sector in each area. A Durban branch has already been set up and others will follow,” said Ruben van Loggerenberg, General Manager. When asked about future marketing strategies for the local market, van Loggerenberg commented, “We have established an enviable reputation with the products we sell and will continue to supply customers that look for long term solutions with valves that outlast any other valve in the market. The influx of low-cost valves from the East, do affect our sales at times but future development of new product line we will be competitively priced the quality of a locally manufactured valve. We also designed a triple off-set metal seated butterfly valve for Eskom in conjunction with their engineers, with a replaceable seat in the body and the disc, and this product has generated interest from other interested parties, chemical, energy, and water sectors”. “There is probably not a single river of any importance whose waters do not, at some point flow through an Ainsworth valve.” Ainsworth Engineering / United Valve Company Tel: +27 (0)11 433 3968, Email: sales@uvc.co.za Web: www.uvc.co.za Pipes, Pumps and Valves Africa - Jan/Feb 2019




SAPSDA and SASSDA join forces In 2013, the dti and ESKOM requested the South African Pump Manufacturers Association (Sapma®) to form the South African Pump Cluster. In order to comply with the dti requirement to form a cluster, Sapma had to change from being an employer’s association to become a development association and to register as a non-profit company. As a result the Southern African Pump Systems Development Association® (Sapsda®) was formed. The new board of directors of Sapsda decided to emulate the structure of the Southern Africa Stainless Steel Development Association® (Sassda) which has been in existence since 1964 and has more than 400 members. Sassda is one of the most active stainless-steel industry associations in the world and has been involved in increasing the awareness and use of stainless steel in Southern Africa. The organisation provides a platform for Sassda members to collectively promote the sustainable growth and development of the industry with the main emphasis on stainless steel converted within the South African economy. Sapsda joined Sassda in 2017 with the main aim that Sassda not only handles the administration of Sapsda but Sapsda also utilizes the facilities of Sassda situated at 3741, Homestead Road, Edenburg, Rivonia for training and meetings. Again, the format as set by Sassda was emulated and Sapsda identified the various sectors that a pump system would consists of, as follows: Pumps, Electrical Motors and Drives, Sealing Systems , Bearings, Couplings and Mechanical Drives, Control Valves, Electrical Cables, Switchgear and Control Panels. With the South African Foundry Industry being under pressure due to the impact of the importation of cheap cast iron products. It was established that the South African foundry industry is internationally competitive in StainlessSteel castings and in particular where Duplex StainlessSteel is required. Sapsda and Sassda will promote the manufacture of Stainless-Steel products such as pumps, valves and sealing systems to compete internationally and stimulate growth in at least three of the Sapsda sectors. Besides the drive to manufacture specific stainless-steel products in South Africa both associations have put a development plan in place to promote local manufacture as well as skills development. Education, training and skills upgrading are without doubt three of the most important factors determining the successful growth of an industry. 6

Pipes, Pumps and Valves Africa - Jan/Feb 2019

Any industry, therefore, which aims to become competitive both locally and in world markets must have both the will and the means to ensure that its personnel, at all levels, are educated in every aspect of their job. On becoming a development association Sapsda formulated the Development Plan which consists of the following 4 sections: • Skills Development: Training material and courses are to be revised and updated, and member companies are invited to participate in the Skills Development Committee as well as getting other associations and institutions involve i.e. SAIEE, SAIME, Sassda and SAFA. Colleges and universities to collaborate with Skills Development Committee to offer previously disadvantaged students’ exposure to the industry with the aim to join the industry. Member companies are encouraged to offer internships and apprenticeships. • Local Manufacturing: In order to stimulate growth in the market for local manufactured stainless-steel products such as pumps, valves and sealing systems these products need to be designated and therefore the revival of the South African Pump Cluster to comply with the dti requirements is necessitated. All companies that can manufacture the components required by the local industry will be identified and member companies encouraged to support these manufacturers. Previously disadvantaged companies are to be assisted to become future suppliers to the industry, while black industrialists are to be developed by offering mentorships. • Local Certification: Products manufactured locally need to be certified by a local certification authority and the accreditation of this local certification authority need to be accepted internationally to encourage exports which will a major factor in job creations. To reach this objective international market opportunities will be identified. • Export and Marketing Assistance: Sapsda, as a development association, plans to participate in the various outboard missions and exhibitions as arranged by the dti, relevant to the industry. The dti regularly offers opportunities in the form of Outboard missions and Exhibitions under the dti export and marketing assistance (EMIA) program both locally and internationally. Website: www.sapsda.co.za



Kingsley Duba pledges continued support for VAMCOSA members The pump and valve industry in South Africa can be regarded as one of the oldest industries in the country. Some manufacturers of pumps and valves can trace their history back to the early 1900’s. Being an integral part of industrial development, the pump and valve industry has, over the years, been well supported by the market and government infrastructures. In recent times however, new developments have emerged creating new challenges for local manufacturers. The newly appointed Chairman of the Valve and Actuators Manufacturers Cluster (VAMCOSA), Kingsley Duba, during a recent interview, reiterated his support for the industry and the commitment of the organisation to furthering these objectives for the benefit of the members and the industry as a whole. “One of the main objectives of my tenure is to concentrate on the skills development programme where we can draw from local communities to provide candidates for training as artisans. Member companies have bought into this programme and it is our plan to go into this with local stakeholders like colleges, universities, government departments and CSIR and SABS, to further this objective. One drawback though, is the slowdown in demand in local products, affected by the influx if imports, thereby providing a void for employing additional labour. Fortunately SA Capital Equipment (SACEC) has taken over most of the project for skill development and is continuously working with schools and institutions to maintain a level of awareness,” says Kingsley Duba. “Aligned to the skills programme is the question of increasing local manufacturing as a means of safeguarding against imports. Here the Department of Trade and Industry (DTI) has been supportive of this objective, ensuring the local content designation of 70 % is maintained and applied rigorously to all tender business. As far as export markets are concerned, the DTI continues to create opportunities for members through the outward trade missions, international exhibitions, leads and recommendations,” commented Duba. “There are many challenges associated with our industry and many of them require continuous attention. My plan is to concentrate on the transformation policies by

Kingsley Duba, Vamcosa’s Chairman

working with members and Government to promote the concept in order to avoid the confusion that exists in the implementation. I would be working to expand opportunities for members in the area of research that will create new product opportunities, enabling potential for new markets. One of the areas of evolution will be the mentorship programme which will start with bringing in small business owners who currently repair and refurbish pumps and valves, by giving them opportunities that will eventually lead to manufacturing. The economic landscape holds many challenges for the country and as Chairman of VAMCOSA I have a task to ensure our industry plays its role and continues to contribute to the well being of all,” concluded Kingsley Duba. Website: www.saceec.com/vamcosa Pipes, Pumps and Valves Africa - Sep/Oct 2018


Ernest Electro Engineering leaders in pumping solutions


South Africa has a diverse infrastructure and ever changing weather patterns which has given rise to a need for efficient and cost effective methods of managing the accumulation of water and other undesirable liquid formations in strategic and industrial areas of the country.

The demand for liquid extraction methods has thus escalated over the years to the extent that approximately one hundred companies and manufacturers have entered the market in pursuance of a share of the spoils. One of the most cost effective methods of pumping is the electric submersible borehole pump which has a hermetically sealed motor close-coupled to the pump body and fully submerged in the liquid to be pumped. One of the leading brands available in the market is ODDESSE, whose history can be traced back to 1854 and can be further described as German technology at its best. ODDESSE has been in the forefront of development of pumps and motors since the turn of the century especially for the delivery of abrasive and aggressive liquids in the main operational areas of the mining industry. Representing the German manufacturer in South Africa is Ernest Electro Engineering (Pty) Ltd, a family owned business in existence since 1964 that has a well established reputation for providing pumping solutions to all sections of the industrial market. From supplying borehole and sewerage pumps to the specialised saltwater resistant pumps to desalination plants, the company is well geared 8

Pipes, Pumps and Valves Africa - Jan/Feb 2019

and continuously updated with new technologies and new materials to meet the specific requirements of customers and the environment. “Our association with a state- of- the- art product like ODDESSE has placed our company in the forefront of pump products offered in the market. Their submersible borehole pumps are able to operate horizontally and are unique in that they can be applied to various functions especially those that require pumping over a long distance. The pump design is such that, secured horizontally under a float, it allows water to be pumped efficiently over a distance of up to 36 km and more. The main characteristic of the pump is the lack of turbulence and flow restrictions. This concept is therefore totally cost effective in that it eliminates the need for additional pumping stations every kilometre,� explained Gert Schwacke, Managing Director. The submersible motor is a three-phase asynchronous motor with a short circuit rotor which can be adapted to operate in either clockwise or anti-clockwise direction. It is designed as a wet- running motor with a watertight insulated winding they can be used in an upright or horizontal position. All motors can be re-wound. The motor connections are

In essence all motors comply with VDE-regulations and conform to the EC declaration of conformity as define by the machinery directive 2006/42/EEC. TUV Tested.


The most advanced Borehole motor protection available The future in submersible pumping technology



The digital control module built into the motors ensures a fail-safe operating system in the submersible pump whereby the motor cuts out when the water level drops to below predetermined level, or if the temperature inside the motor reaches a certain point.

according to NEMA and international standards depending on the model. Lubrication of the bearings is by means of a mixture of glycerine and water. Glycerine, being biodegradable ensures anti-freeze protection up to -25 degrees C.Axial down thrusts are absorbed by axial thrust bearings with individual tilting pads. Motors are encapsulated by a high quality mechanical seal. A reliable diaphragm provides the pressure compensation between the motor and its environment.

“Ernest Electro Engineering can be justifiably proud of their history over the past 55 years supported by a long standing loyal staff whose goal is to provide sound product knowledge and the most cost effective and efficient products available. We pride ourselves on understanding our customers’ needs and providing the correct installation solution first time round. Engineering is but a science where applying the correct solution saves time and money,” concluded Gert Schwacke. Gert Schwacke, Ernest Electro Engineering, Tel: +27 (0)11 792 9550, Email: eeeaman@mweb.co.za, Website: www.ernestee.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2019


Tips for selecting dewatering pumps


The applications for dewatering pumps vary widely. Therefore, it’s essential when building a pump portfolio that users choose equipment that is versatile, while remaining productive, safe and trouble-free.

Five key considerations you should focus on when purchasing dewatering pumps:

well as easier to move and transport both on and between work sites.

Tip 1: Efficiency

Consequently, buyers should take time to ensure they select a pump that is suitable for use on multiple sites where the pumps might be working, and include builtin features that enhance movement and safety. Many larger pumps have integrated trailer options, as well as integrated lifting beams and/or forklift slots.

When users have to choose a pump, they usually opt for larger sizes on the basis that they can cover a multitude of jobs, but, in doing so, energy efficiency is often sacrificed. Developments in technology are helping to reduce fuel usage and operating costs. In recent years, newer types of pumps have been introduced that are specifically designed to reduce fuel consumption at times of low loads and to cope with fluctuating application demands; without running up high-fuel costs or risking burnout. Therefore, it is recommended that buyers consider newer types of technology, rather than simply replicating orders from the past. Bigger is not always better!

Tip 2: Size and Movement Pumps are now being developed to be smaller and lighter, as 10

Pipes, Pumps and Valves Africa - Jan/Feb 2019

Buyers should ask what options the manufacturer has added to aid the safe movement of the pump from site to site, or within the working location where it is needed.

Tip 3: Versatility No two jobs are ever the same. For this reason, it is recommended to choose a pump that is suitable for multiple applications. Taking a look at the design of the pump’s components and how they work together should therefore be a priority.

Subsequently, users should consider pumps that come with: 1.A range of accessories to enhance performance for changing applications. 2.A performance that covers multiple applications and offers different options. 3.A modular design that enables upgrades or changes to the existing pump, without the need to replace it with a completely new one.

Tip 4: Durability Pumps need to perform reliably in extreme environments. Therefore, it is important the selected pump has been tested and is capable of withstanding tough and changeable working conditions as soon as it is turned on. In addition, pumps shouldn’t get clogged up. If a pump becomes clogged, then it will reduce the flow of water being pumped. When clogging occurs, it will affect performance, and if allowed to continue for an extended period of time the pump could ultimately burn out. It’s not very often that users are pumping perfectly clean water, so some elements of clogging are a hazard of the task. To protect against problems, leading manufacturers are continually looking at the positioning of parts and specifically the inlet holes and passing areas. Before choosing a pump, users should ask what steps the manufacturer has taken to avoid clogging and guarantee consistent performance.

Tip 5: Ease of Service Downtime is lost time. When it comes to pumping fluids, any time lost for maintenance and repairs can be catastrophic. It is recommended to choose pumps with a combination of long service intervals and simple service. Furthermore, as every second counts in terms of operational time, it is suggested to seek pumps that can be serviced in minutes, not hours, with easy access to all parts and consumables. Often, service needs to be completed remotely or at a job site, so the availability and simplicity of service pack is a major consideration.

Conclusion This is a general overview of some of the key things to look for when hiring or purchasing pumps. When it comes to specific applications, buyers should always discuss the application needs directly with their dealer. This conversation should include the following key considerations: 1.What is the maximum head height you need to pump? 2.How far do you need to pump the water? 3.What sizes hoses can you fit? 4.Do you have a specific flow you need to guarantee? 5.Do you have electrical power available? 6.How accessible is the location where you will use the pump? 7.What is the size and depth of the pit? 8.What solids might you encounter? 9.How quickly do you need to start pumping? 10.Are there noise or engine tier regulations to be considered? Source: www.redstarequipment.com

The history of pumps: The journey and evolution through the years PUMPS

Taking a closer look at the very start of the humble pump. Today’s pumps are lightyears ahead of their ancient counterparts, a travel back in history, gives us better appreciation of this simple yet ingenious device.

Ever since 2000 BC, when the Egyptians invented a rudimentary device to draw water from wells, pumps have been an indispensable part of our lives. Though this first pump may seem too simple by today’s standards, it has to be noted that it came about only after a thousand or so years of human existence on the planet.

the opposite end was attached a counterweight. When the lever was pushed down, the bucket filled with water and the counterweight bounced back the lever, bringing the bucket up. This was then emptied into a trough. Quite ingenious, isn’t it? Especially considering that someone came up with this several millennia ago. The first pump invented by mankind was the Shadoof. And, the Egyptians are the ones who are credited for this invention, millennia back in 2000 BC. The Shadoof is a bucket that was tied to a rod or a rope and was used to raise water from deep wells. Though this doesn’t accurately describe the workings of a pump, this is the first proof from history that states that man has always been looking for gadget to make it easy to transport water.

Mesopotamia – 3000 BC

First things first,

What is a Pump?

The first pump invented by mankind was the Shadoof. And, the Egyptians are the ones who are credited for this invention, millennia back in 2000 BC. The Shadoof is a bucket that was tied to a rod or a rope and was used to raise water from deep wells. Though this doesn’t accurately describe the workings of a pump, this is the first proof from history that states that man has always been looking for gadget to make it easy to transport water.

Regardless of the application, all pumps have one common purpose – to dispatch liquids. Shall we take a look at how this simple, crude device evolved into its modern form that is used in a wide range of applications? The ancient empire of Mesopotamia is accredited with several modern-day inventions. The Mesopotamians were indeed an intelligent lot and had plenty of scientific thinking. Agriculture, writing, wine, the wheel, and domestication of animals are just a few of the things that this civilization introduced to the world. The ancient civilization of Mesopotamia lived in the regions of modern-day Iran, Turkey, Iraq and Syria. Though their invention wasn’t a pump by today’s definition, it’s worth mentioning here. They used a wooden lever that was placed adjacent to a water bank. On one end of the lever was a bucket and to 12

Pipes, Pumps and Valves Africa - Jan/Feb 2019

Egyptians – 2000 BC

began to be focused on again. It was during this era that pumps had a rebirth and over the next couple of centuries, new ideas and inventions began to flood the market, all of which led to the design of modern day pumps. Let’s take a look at few modern-day pumps and their inventors. •Gear Pump – In the year 1593, a Frenchman named Nicolas Grollier de Serviere charted the early designs for a gear pump. Later in 1636, a German engineer named Pappenheim invented the double, deep-toothed rotary gear pump that is still used for lubricating engines even today.

•Savery Pump – In the year, 1698, an inventor Thomas Avery created a pump that used steam for operation. The steam generated a vacuum which in turn pulled up water.

Modern Day Pumps

The next big advances to pumps came during the era of the Greek civilization. Between the third and first centuries BC, the Greeks were at the zenith of their civilization and significant advances were made in science, technology, warfare and arts. The engineers of Hellen invented the water wheel, which was then used for irrigation and to generate power. It was during this period in history, that Archimedes came up with one of the best inventions of all mankind – the screw pump. It’s a simple but ingenious invention that is still seen today in various parts of the world. Rural areas that don’t have electricity use the screw pumps to raise water for irrigation. Another significant contribution during this era was made by Ctesibus from Alexandria in Egypt. He was the inventor of the force pump, which is a type of hand-operated pump. It consists of a cylinder along with a top-mounted plunger, which was used to draw water via valves. After the fall of the great Roman Empire, pump technology became stagnant for nearly a millennium and a half. It was only during the Enlightenment Period that hydraulic science


•Centrifugal Pump – This is one of the most common types of pumps used today and it was invented in the 17th century by Denis Papin, a French inventor. He used straight vanes for drainage. The centrifugal pump is a motor driven pump that pulls water by creating a suction force.

•Axial Flow Pump – Since the 1940s, axial pumps are a constant presence in water services. Apart from this application, the axial flow pump is also used extensively in the industrial and commercial sectors. •Jet Pump – This is similar to the centrifugal pump but is mainly used to raise water up from deep wells. •Electromagnetic Pumps – This is mainly used in advanced applications like nuclear reactors. This is because electromagnetic pumps can handle very high temperatures. Hence, it’s ideal for applications that move liquid metals and other electrically conducive liquids. It uses an electromagnetic force to displace the liquids. •Submersible pump, deep well turbine pump, seal-less vertical pump, bush pump, peristaltic pump, metering pump, magnetic drive pump, chopper pump, circulated pump, air-operated double diaphragm pump – are some of the other pumps that were invented in the 1900s. This is just a short introduction to the long history of pumps that dates back thousands of years. Web: www.sintechpumps.com

Pompetravaini, a market leader in the manufacture of Liquid Ring Vacuum Pumps – A&VT are the Sole Agents for Southern Africa.



0861 VACTEC (822 832)


Pipes, Pumps and Valves Africa - Jan/Feb 2019


Complete filling station construction solutions


Currently delivering filling station solutions to major oil companies throughout South Africa, PC Pump & Tank (PTY) LTD with CEO, Peet De Beer at the reigns, is a VAT Registered Level 2 BBBEE partnership. Peet and his dedicated team of employees have successfully completed maintenance contracts and projects for a plethora of satisfied clients. Although they are based in Alberton, Gauteng, they are able to deliver their services nationally and stretch over South African borders to neighbouring countries.

PC Pump and Tank guarantees certified, competent operators of their plant equipment to ensure compliance with industry regulations thus optimising safety and efficiency. CEO, Peet, asserts that a proper maintenance plan warrants limited breakdowns and downtime during day-to-day operations.

The services available to you, but not limited to:

Compliance to the national legislation and quality of the services they provide is of high priority for PC Pump & Tank’s (PTY) LTD management. Their systems procedures are readily available for audit by external auditors. To safeguard their promise of quality services, their comprehensive safety & quality management system is routinely updated to the latest legislation. To ensure the quality of their services, employees are trained & evaluated by external SAQCC registered service providers.

• Civil works including earthworks, brick-work, paving, tar, bund walls, pump islands, bollards and concrete work • Underground and aboveground storage Tanks includes installation, testing, removal & commission • Pumps and dispensers maintenance, installation and commissioning • Piping installation and removal • Electrical installation with COC • Removal and safe disposal of off speck product, tanks & piping. To ensure prompt service delivery to their client base, they have formed 12 teams who are available to see to their clients twenty-four seven. With the use of a wide variety of resources such as heavy plant, trucks, machines and equipment readily available, they aim to provide the very best service.


Pipes, Pumps and Valves Africa - Jan/Feb 2019

Experienced technicians are recruited by PC Pump & Tank (PTY) LTD and are mandated deliver workmanship of the highest standard. They pride themselves on the quality of work and it is proven by the act recommendations from previous and current clients. PC Pump and Tank, Tel: +27 (0)11 869 7859, Email: pcpump.tank@telkomsa.net Web: www.pumpandtank.co.za




You choose. We supply. Our wide range of standard pumps and valves provides plenty of scope for individual demands. You can select the materials, hydraulic systems and drives. When you’re facing complex tasks, we’re with you from Day One – whether you want planning guidance, specially designed components or help with commissioning. But see for yourself. Test our products for quality and versatility, and discover why KSB is so often first choice. KSB Pumps and Valves (Pty) Ltd www.ksbpumps.co.za tel: +27-11-876-5600

Our technology. Your success. Pumps





One provider

Submersible Pumps - A viable option


For a growing number of industries and applications, submersible pumps are becoming the first choice, not only because they reduce the costs involved with downtime, but due to these pumps’ inherent ability to cope with harsh environments. Pipes, Pumps & Valves Africa finds out more. Harsh environments can wreak havoc on an average pump. Stringy, fibrous, and abrasive solids cause premature pump wear and failures. This all leads to increased costs from unscheduled down-time, pump repair and replacement costs, and lost production, says Steve Mosley, inside sales manager at BJM Pumps.

construction rental, utilities, municipal wastewater, commercial building, general industrial, mining, oil and gas production and many others, Mosley says the term harsh environment can have a different meaning depending on the location.

“Submersible pumps work well in a range of applications offering a reliable, long-term solution in difficult environments,” he says.

According to Mosley for many applications, submersible pumps provide significant advantages over other pump types, many of which are inherent to their design. “By placing the pump into the liquid ensures there will always be a flooded suction and sufficient Net Positive Suction head (NPSH) available,” he says. “This is a critical feature when handling high temperature liquids as long suction lines can cause these liquids to flash into steam,

It can, however, be challenging to find the right submersible pump even for those with decades of experience as proper selection and installation are critical factors for success. Used in a variety of applications in food processing,


Pipes, Pumps and Valves Africa - Jan/Feb 2019

Advantages of submersible pumps

leading to a loss of pump prime.” It also provides advantages when operating at high elevations with limited NPSH available. “The closed coupled motor used in a submersible pump means a shorter overall motor rotor shaft length than other pump designs. This minimizes the potential for shaft deflections that can lead to seal failures. These pumps also shorten the overall shaft and a shorter shaft also eliminates the need to lubricate bearings that vertical sump pumps typically demand,” says Mosley. “At the same time, the when placed on a side rail assembly the compact design also allows easy removal for maintenance.”


He says other benefits are no restrictions on NSHP, no long shafts as is often found in many pump designs, the pumps can handle municipal, commercial and industrial wastewater solids, while there is also no priming issues or clogging. “It all results in reduced downtime and maintenance requirements which ultimately leads to cost savings.”

Selecting a submersible pump The first step, says Mosley, is defining the fluid being pumped. “The selection of a pump is highly dependent on what fluid is being pumped and therefore it is essential to define the fluid.” Questions to ask include what type of solids are present – if any and if there are solids present what kind of solids are they and how much is there. It is also important to determine whether the fluid is water or oil based, if there are chemicals present, what’s the temperature or even if it is brackish.

Chemicals and temperature The nature of the fluid does have an impact, says Mosley. “Aggressive chemicals can corrode cast iron or bronze pump components, and can also attack O-rings, seals, and power cable materials. Pumps can be constructed of plastics, 316 stainless steel, or more exotic alloys to provide greater protection against acidic and caustic chemicals, food processing residues, liquids and by-products.” The effects of chemicals on pump materials can also be more serious as the fluid temperature rises. Many submersible pumps, he says, are only rated for liquids 40°C and lower, making them unsuitable for higher temperature applications. “High-temperature submersible pumps that can operate in liquids up to 93°C are available specifically for these needs. High temperature submersible pumps are used extensively in boiler blowdown applications, steam distribution systems, and Clean in Place applications in food processing, bottling, and pharmaceutical plants,” he says.

Understanding solids The concentration of solids in a fluid can be either high or low to be a challenge for the system. Modern wastewater often contains difficult products that can be problematic for a pump to pass. Nappies, rags and gloves are but a few

examples of products that require shredding before being pumped downstream effectively. “Even products such as flushable wipes can be challenging leading to frequent pump clogs and failures,” says Mosley. And it is experienced across sectors be it municipal, institutional and/or industrial. “Solids can pose a wide variety of challenges,” says Mosley. “For example, in many food and beverage plants, the solids can be from product packaging like bottle caps or pieces of Styrofoam or labels or parts of the product itself. This is often seen in food plants where meat, feathers, bones, pieces of fruit and other solids cause problems.” According to Mosley, the amount and kind of solids present will determine what shredding capability is required. Ultimately it is about avoiding pumps getting clogged as this can lead to flooded wastewater pits, which shut down production and can even contaminate products, he says “Many of these food and beverage plants also run periodic clean-in-place (CIP) cycles, which can involve a variety of chemicals at high temperature, adding to the challenges for pump selection. Selecting the right solids-handling pump is therefore another key aspect to ensuring an acceptable pump lifetime.” Pipes, Pumps and Valves Africa - Jan/Feb 2019



Atlas Copco has completed its portfolio of WEDA electric submersible dewatering pumps. They have achieved this comprehensive coverage by completing the ranges for drainage and sludge applications and adding a completely new range for slurry applications. Selection from the entire, expanded range is simplified as all models are classified by application and type of fluid that they handle. The range now comprises three families; the expanded WEDA D for dewatering, WEDA S – also expanded - for sludge, and the entirely new WEDA L slurry family. WEDA D pumps handle either clean or dirty water, even with small solids. The WEDA S range supports dewatering of liquid sludge containing larger solids. The WEDA L products are the toughest, and have the largest apertures to facilitate handling of slurry with the most challenging solids. The WEDA D family expansion is marked by the D80, a new model for dewatering. S30, and S60, as the new models for the WEDA S sludge family, can handle thick, soft, wet mud or other similarly viscous mixtures of liquids and solids, especially the product of an industrial or refining process. The completely new WEDA L family handles semi-liquid slurry mixtures, typically of fine particles of manure, cement or coal, and water. Aside from optimising their performance, a lot of focus has been given to make the pumps lighter, enhance electrical safety, improve the seal design and ease installation. All pumps in the D and S range are available with WEDA+


Pipes, Pumps and Valves Africa - Jan/Feb 2019

features, which include phase failure protection, rotation control, thermal switches and a 20 m cable with phase shifter plug for all 3 phase pumps. The WEDA+ features are also available as an option on the L range. Overall, the WEDA D pumps, which use top-discharge, can handle water of specific gravity to 1100kg/m3, and, depending on model, solids of 4 – 12mm diameter. The bottom side discharging WEDA S pumps’ capabilities extend to water with specific gravity to 1400kg/m3, and solids of 25 – 50mm, depending on model. The WEDA L pumps, which also use bottom side discharge, handle water of specific gravity up to 1700kg/m3, and, depending on model, solids of 20 – 60mm diameter. The pumps’ specifications equip them well for an extensive range of dewatering applications; they provide the performance, reliability and ease of use and maintenance essential to users across multiple industries. All models feature a built-in starter and motor protection system along with optional automatic level control. Adjustable wear-resistant rubber diffusors and hardened high-chrome

impellers ensure durability in tough environments. “ The WEDA pumps can handle flow rates of up to 16,500l/ min, with power ratings up to 54kW,.Accordingly, they make ideal dewatering solutions across many, diverse applications within the construction, industrial, emergency and maintenance sectors. Now, our ubiquitous coverage has been highlighted by these latest additions to the range, as they make our portfolio complete. ”explains Hrishi Kulkarni, Product Manager , Atlas Copco Power and Flow division.

Ease of operation is carefully balanced with high performance, with some models’ ability to pass solids of up to 2” through the pump. An improved aluminium alloy provides higher corrosion resistance over all applications, while reinforced cable entries assure higher resistance to water leakage. Uptime is maximized through several measures. All pumps have seal types appropriate to their size, and an external plug for grease filling or an oil inspection plug for easy maintenance. With many connection options and sizes, discharge connections are adjustable, with flow direction changeable from 90-180 degrees.



Handling and transportation are considerably eased by the pumps’ weight, which is 20 per cent lower than competitor products; an advantage which makes them especially attractive for rental use.

WEDA pump users are supported by a wide network of dealers and service technicians, and readily-available parts. Atlas Copco, Tel: +27(0) 11 821 9000, Email: wendyb@za.atlascopco.com, Web: www.atlascopco.com

2019/02/19 11:42

Pipes, Pumps and Valves Africa - Jan/Feb 2019



Robust Grindex Bravo slurry pumps offer what Africa needs Tough operating conditions are the norm in the mining sector, and even more so when it comes to slurry pumping applications. If incorrect pump choices are made in these demanding applications, it can lead to high maintenance and repair costs and even catastrophic failures. Colin Adams, managing director of Integrated Pump Technology, says the company often receives enquiries from African-based mining operations who have already made the mistake of not specifying high quality OEM products. “Slurry pumps need to be up to the task of handling high volumes of abrasive material, and when this is not the case these failures lead to costly production downtime with the obvious knock-on effects,” he says. “For a number of years we have been cautioning the market and urging mine operators to carefully consider the overall total cost of operating slurry pumps when making decisions on which units to install.” Integrated Pump Technology is the authorised distributor for Grindex submersible pumps and included in its product lineup is the well-respected Grindex Bravo range. Adams says these robust, durable and high performance pumps offers a good return on investment as the units are engineered to achieve lower operating and maintenance costs. Commenting on why a submersible slurry pump is a better option for slurry pumping, Adams says that submersibles offer several benefits over dry-mounted pumps. They do not require any support structure, need less space for operation and are very easy to install. The Grindex Bravo range is produced to operate over the complete pump curve, not just one specific duty point. This means that the pump can be used in numerous applications within its range and it is not a case of “one pump – one application.” Grindex Bravo pumps are fitted with a cooling jacket and an agitator for effective slurry pumping. Pumps in the range can handle slurry and fluids with a high content of highly abrasive solids in sizes up to 50 mm at maximum heads from 17 to 45 metres. Wear is reduced by using NiHard 4 for all hydraulic components, and these pumps can handle liquids with pH values from 4 up to 10. Adams also points to the high level of support that is available to customers across Africa through Integrated Pump Technology’s extensive distributor network which is underpinned by the company’s experienced technically competent African team. Ready access to parts also forms part of the support system, ensuring optimum uptime for customers. 20

Pipes, Pumps and Valves Africa - Jan/Feb 2019

Grindex Bravo slurry pump on display at Electra Mining Africa 2018.

Colin Adams, Integrated Pump Technology, Tel: +27 (0)11 918 9034, Email: Colin@pump-technology.com Web: www.pump-technology.com

Ground Stabilization Work on Reclaimed Land for a New Airport Runway Several of Tsurumi's submersible construction dewatering pumps and seawaterresistant pumps are being used as a part of operating this equipment.

Besides the KTZ pumps, an HS2.4S single-phase portable drainage pump is used on board the work barge to discharge rainwater from the pit and leftover drainage. By discharging this water, this pump is preventing seepage to lower decks.


The mixing plant needs to be washed down periodically. The wash water from that is pumped to two filtration tanks and, after filtering, to a sedimentation tank. Three of Tsurumi's KTZ32.2 submersible construction dewatering pumps are being used to move the wash water.

These pumps have been highly lauded for not breaking down and especially the seawater-resistant pumps for not rusting.

The job is employing a work barge outfitted with a mixing plant. The mixing plant is supported by a storage tank for holding seawater, two filtration tanks for filtering wash water after plant washdowns and a sedimentation tank for processing the filtered wash water. Tsurumi's KTZ43.7 and KTZ411 seawater-resistant pumps are being used to pump seawater to the storage tank and from the storage tank to the mixing plant.

The seawater-resistant pumps used in this example are standard specification pumps that can be easily modified with Tsurumi’s seawater-resistant kit consisting of a galvanic anode and seawater-resistant special cast iron impeller. The kit is designed to enable about two years of use in seawater. (The service period depends on operating conditions.) Tsurumi Pumps, Tel: +27(0) 11 876 5005, Web: www.tsurumipumps.co.za

New tensioning pumps launched

Enerpac, part of the Actuant Corporation, has announced the launch of its ZUTP-S Series electric tensioning pumps for oil and gas, wind power and power plant applications. The company says the tensioning pump provides reliable power and precision for critical bolting joints in the assembly of gas and wind turbines, compressors, and power shaft couplings. The ZUTP-S Series features a pendant-operated solenoid valve which is designed for multiple bolt tensioning applications. It also allows for single-person operation. The operator can pressurise and retract the tensioner directly from the pendant. The pump generates 21,750 psi (1500 bar) of pressure without the need for an intensifier. The new tensioning pump series features a two-stage pump design providing high flow at low pressure for fast system fills and controlled flow at high pressure for accurate operation. A manual override valve quickly releases pressure if power is lost. The ZUTP-S Series has a 1.7 hp heavy-duty universal motor and the pump’s panel-mounted 15cm (6 inch)

pressure gauge has a polycarbonate cover set into the protective metal shroud for improved visibility. The series also includes a replaceable 10-micron reservoir breather and inline high-pressure filter helps maintain oil cleanliness. Neil Watson, Enerpac, Tel: +27(0) 12 940 0656, Web: www.enerpac.com Pipes, Pumps and Valves Africa - Jan/Feb 2019


KSB expands its aftermarket services


KSB Pumps and Valves is intensifying its focus on aftermarket services that add value to customer operations far beyond the supply and maintenance of its own products.

In future the company will also extend its services and engineering expertise to include maintenance of entire systems, reverse engineering of rotating equipment and system optimisations. This includes maintenance of thirdparty peripheral equipment in order to ensure its clients systems perform optimally at all times. “Our aftermarket engineering teams can also remanufacture or reverse engineer equipment that is no longer available but necessary to meet client’s requirements,” says KSB Pumps and Valves SupremeServ division manager, Grant Glennistor.

Supreme service He continues that all aftermarket services globally fall under the new KSB SupremeServ banner which encompasses existing and new maintenance, logistics and engineering infrastructure and is entirely focused on elevating customer assistance to new heights within the pump industry. “SupremeServ is a safety net that ensures KSB’s extensive South African, as well as global infrastructure and expertise is available to support customers’ fluid transfer projects, including equipment and related infrastructure to ensure its long-term success. “It includes a faster supply chain with a move towards fully automated logistics functions for faster spare parts turnarounds, upgraded high-tech service centres at all KSB branches, specialised repair services on all makes of pumps and related equipment, specialised welding, as well as installations, commissioning, performance testing on site, decommissioning and other advanced field service and engineering services.” 22

Pipes, Pumps and Valves Africa - Jan/Feb 2019

World-class Local pump users are in good hands when they deal with the company which has a history spanning more than 60 years in South Africa. The local operation also ranks as one of the top service centres within the “KSB World” of 16 000 employees in more than 60 countries. Its resident engineers are regarded as among the best undertaking all kinds of projects in the remediation and repairs of equipment in projects as diverse as power generation plants, petrochemical, bulk water supply projects, as well as being equally eager to assist smallscale industrial and agricultural projects. This ensures KSB SupremeServ services are available for the widest possible range of clients whether for basic or large-scale or complex services. ] Simultaneously, the company has ongoing programmes to continuously improve services through constant upskilling and development of its staff in line with market requirements. This level of commitment has also led to the company qualifying as a Level 1 BBBEE provider.

Well situated KSB SupremeServ centres are situated at all local branches with spares and standard parts available within 24 hours to service all 22 000 variants of its own pump. The centres also dedicated walk-in-centres for on-the-go-services. Annett Kriel, KSB Pumps and Valves Tel: +27 (0)11 876 5600, Email: Anette.Kriel@ksb.com, Web: www.ksbpumps.com

“A Partnership that Works”

+27 (0)11 869 7859 +27 (0)72 185 1492

pcpump.tank@telkomsa.net www.pumpandtank.co.za

• Civils • Pumps • Tanks (A/G - U/G) • Pipe work • Pressure testing • Electrical • Vasconic Testing • Tank De-gasing & Cleaning

Innovation Award for Mokveld’s Typhoon Valve System VALVES

Mokveld’s Typhoon Valve System has scooped the ONS2018 Innovation Award in recognition of its industry transforming low shear technology which sets a whole new standard in the oil and gas industry. The future of the international oil and gas industry depends increasingly on the supply chain’s ability to develop new technologies as the industry seeks to evolve and end its reliance on past practices to secure future business. That is exactly the purpose behind the ONS Innovation Awards – to discover and reward emerging technologies that can transform the oil, gas and energy industry. It is no surprise that Mokveld’s Typhoon Valve System – with its cutting-edge low shear technology – has been recognised for its contribution to cleaner production in the oil and gas industry with the ONS2018 Innovation Award. Awarded since 1982, the Innovation Award recognises the crucial importance of cutting-edge technologies and solutions. “The ONS Innovation Award is one of the most important fairs in the oil and gas industry,” explains Laetitia Jansen van Vuuren, Technologies Product Engineer at Energas Technologies, the sub-Saharan Africa distributor of the Mokveld range of valves for the past 17 years. “The award is intended to recognise innovative technologies that demonstrate their ability to advance the oil and gas industry. Winning the ONS2018 Innovation Award recognises Mokveld’s innovative Typhoon Valve System and the value this technology will add to the oil and gas industry.” So, what makes this technology tick? The Typhoon Valve system is a solution suited for existing or new oil production plants. In contrast to conventional choke and control valves, Typhoon Valve uses patented trim technology to involve a larger fluid volume that is actively dissipating energy. “By using low shear valves and pumps, it is also estimated that greenfield separation plants can be built 30-50% lighter and smaller, which will have large cost saving potential on both OPEX and CAPEX for oil companies. Oil production is a fluctuating market and Energas will support and supply the sub-Saharan African market with the new valve technology,” says Jansen van Vuuren.

Understanding the tech In every process plant you will find sources of unwanted turbulence and emulsification of oil and water. The main principle behind low shear processing is prevention of separation problems caused by shearing of the production fluids in conventional valves and pumps. Switching from conventional valves to low shear versions gives significantly improved separation and less oil residues in the produced water. 24

Pipes, Pumps and Valves Africa - Jan/Feb 2019

The Mokveld's Typhoon Valve System has been recognised for its contribution to cleaner production in the oil and gas industry.

In contrast to conventional choke and control valves, the Typhoon Valve uses the principles of a vortex to control petroleum flows. The main purpose of using the vortex is to involve a larger fluid volume in dissipating energy, which is required to control the flow. This is a totally new way of regulating flow through valves and the technology is patented in 22 countries/areas. The physics in a Typhoon valve enables pressure decrease in a much gentler way than in a conventional valve. This means effects like cleaner water and/or cleaner oil phases in a multiphase flow. In the process train this would mean improved capacity in the separators; reduced need for emulsion breaker and flocculant chemicals; cleaner oil for export; improved capacity in the produced water handling system; and less


Mokveld's Typhoon Valve System has scooped the ONS2018 Innovation Award

discharge of oil residues to sea.

over the field’s lifetime,” explains Jansen van Vuuren.

For mature fields with high water production, switching to low shear choke- and control valves mean that you can increase your separation and produced water handling capacity. This means extended lifetime for oil producing wells. Also, as much of the future field developments will be based on tie-back solutions, low shear choke- and control valves can release tie-back separation and produced water handling capacity on existing processing fields.

Used either as a choke or control valve in petroleum process streams, the Typhoon System will improve the efficiency of downstream separation without resorting to chemicals or additional treatment processes.

Process benefits Using the Typhoon System technology will reduce the mixing and emulsification of oil, water and gas. Chemicals are often used to try to increase separation by repairing damage caused by emulsification of the well fluids due to shear. The effect of separation enhancing chemicals will vary over the well lifetime, dependent on the composition of the fluids. “The Typhoon System deals with the cause of the separation issues by reducing emulsification and shear forces exerted on the fluids. Due to the permanent reduction in shear, Typhoon System has a lasting positive effect on separation, regardless of changes to the composition of the well stream

Potential process benefits include higher efficiency without the need to increase the in size of the separator; reduction of the number of separator steps; in brown field applications, increase in production when using the same separator; and less need for, or improved effect of process chemicals like emulsion breaker, flocculants and anti-foam. “The Typhoon System may therefore reduce overall cost and may increase production rates. The Typhoon System will assure that oil producers will be able to produce in an environmentally friendly way by improving the quality of their waste water,” concludes Jansen van Vuuren. Laetitia Jansen van Vuuren Tel: +27 (0)11 397 6809 Email: laetitia@energas.co.za Web: www.energas.co.za

Robuschi Roots blowers / exhausters are some of the finest in the world – Made in Italy.

info@vactech.co.za 0861 VACTEC (822 832) www.vactech.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2109


Locally manufactured quality Bermad products


Macsteel Fluid Control has been active in the water industry for over 40 years, supplying a number of well-known products. Now the company is taking it one step further, manufacturing quality Bermad products locally. Macsteel Fluid Control is a niche business supplying a comprehensive range of valves, actuators, liquid level gauges, valve interlock systems and a full range of steam products across a number of industries, including water. Well-known as a sole franchise holder in Southern Africa for a number of well-known brands such as Bermad and AMRI, Macsteel Fluid Control has taken a major step towards import substitution with the establishment of a local valve assembly operation.

Local production In 2011 the Department of Trade Industry implemented the revised Preferential Procurement Policy Framework Act in order to boost local production. This meant Macsteel Fluid Control needed to manufacture at least 70% of its products locally. Although Macsteel has always assembled its Bermad


Pipes, Pumps and Valves Africa - Jan/Feb 2019

control valves locally, creating some local content, it did not meet these new requirements. “Meeting this has been quite a challenge, but we decided we wanted to exceed the 70% requirement. However, we needed to ensure we met the same quality, performance and aesthetic requirements as our imported products,” explains Rowan Blomquist, CEO, Macsteel Fluid Control. Macsteel Fluid Control has been working closely with its principal Bermad for roughly five years to fine-tune the local casting and assembly of Bermad control and air valves to the necessary standards. “The locally cast product will be exactly the same as the imported product in terms of quality and performance,” Blomquist emphasises. “We have always supported the local industry through employment, social development initiatives and local


assembly. By manufacturing complete valves locally, which we’ve never done before, we’re taking another step towards building and uplifting our local economy.” With Bermad’s blessing, Macsteel will roll out its local manufacturing operation to market in the first quarter of 2019.

A strong service base Macsteel Fluid Control prides itself on excellent support and backup service, which it will continue to provide in addition to its local manufacture offering. The ISO 9001:2008 certified company has an assembly and test plant in Germiston, as well as an assembly plant for irrigation products in Cape Town. Macsteel Fluid Control employs three local Bermad product specialists, together with five technicians and an extensive sales team, all of whom have technical knowledge and experience.

“Of our 100 employees, 70% are devoted to sales and backup. We also carry roughly R90 million worth of stock at any given time, much of which is spare parts, to eliminate downtime for our clients,” says Blomquist. “It is easy to sell a valve. The true test is when the valve fails and you can step in to address the problem in a timely manner. It’s our service and backup that sets us apart.” The company has a network of branches across sub-Saharan Africa and works closely with consultants and offers inhouse design-services for valve sizing and pipeline design. Rowan Blomquist, Macsteel, Tel: +27 (0)11 383 4000, Cell: +27 (0)82 495 2772, Email: rowan.blomquist@macfluid.co.za, Web: www.macsteel.co.za









Pipes, Pumps and Valves Africa - Jan/Feb 2019


Introduction to Valves, What is a Valve?


Valves are mechanical devices that control the flow and pressure within a system or process. They are essential components of a piping system that conveys liquids, gases, vapors, slurries etc.. Different types of valves are available: gate, globe, plug, ball, butterfly, check, diaphragm, pinch, pressure relief, control valves etc. Each of these types has a number of models, each with different features and functional capabilities. Some valves are self-operated while others manually or with an actuator or pneumatic or hydraulic is operated.

function, and must be constructed of the correct material for the process liquid.

Functions from Valves are:

Valve Body

• Stopping and starting flow • Reduce or increase a flow • Controlling the direction of flow • Regulating a flow or process pressure • Relieve a pipe system of a certain pressure

Regardless of type, all valves have the following basic parts: the body, bonnet, trim (internal elements), actuator, and packing. The basic parts of a valve are illustrated in the image on the right. The valve body, sometimes called the shell, is the primary boundary of a pressure valve. He serves as the main element of a valve assembly because it is the framework that holds all the parts together. The body, the first pressure boundary of a valve, resists fluid pressure loads from connecting piping. It receives inlet and outlet piping through threaded, bolted, or welded joints. The valve-body ends are designed to connect the valve to the piping or equipment nozzle by different types of end connections, such as butt or socket welded, threaded or flanged. Valve bodies are cast or forged in a variety of forms and each component have a specific function and constructed in a material suitable for that function.

Valve Bonnet The cover for the opening in the body is the bonnet, and it is the second most important boundary of a pressure valve. Like valve bodies, bonnets are in many designs and models available. A bonnet acts as a cover on the valve body, is cast or forged of the same material as the body. It is commonly connected to the body by a threaded, bolted, or welded joint. During manufacture of the valve, the internal components, such as stem, disk etc., are put into the body and then the bonnet is attached to hold all parts together inside. In all cases, the attachment of the bonnet to the body is

There are many valve designs, types and models, with a wide range of industrial applications. All satisfy one or more of the functions identified above. Valves are expensive items, and it is important that a correct valve is specified for the 28

Pipes, Pumps and Valves Africa - Jan/Feb 2019

considered a pressure boundary. This means that the weld joint or bolts that connect the bonnet to the body are pressure-retaining parts. Valve bonnets, although a necessity for most valves, represent a cause for concern. Bonnets can complicate the manufacture of valves, increase valve size, represent a significant cost portion of valve cost, and are a source for potential leakage.

Valve Trim

A Valve’s trim performance is determined by the disk and seat interface and the relation of the disk position to the seat. Because of the trim, basic motions and flow control are possible. In rotational motion trim designs, the disk slides closely past the seat to produce a change in flow opening. In linear motion trim designs, the disk lifts perpendicularly away from the seat so that an annular orifice appears. Valve trim parts may be constructed of assorted materials because of the different properties needed to withstand different forces and conditions. Bushings and packing glands do not experience the same forces and conditions as do the valve disc and seat(s). Flow-medium properties, chemical composition, pressure, temperature, flow rate, velocity and viscosity are some of the important considerations in selecting suitable trim materials. Trim materials may or may not be the same material as the valve body or bonnet.

Valve Disk and Seat(s) Disk The disc is the part which allows, throttles, or stops flow, depending on its position. In the case of a plug or a ball valve, the disc is called plug or a ball. The disk is the third most important primary pressure boundary. With the valve closed, full system pressure is applied across the disk, and for this reason, the disk is a pressure related component. Disks are usually forged, and in some designs, hard surfaced to provide good wear properties. Most valves are named, the design of their disks.

Seat(s) The seat or seal rings provide the seating surface for the disk. A valve may have one or more seats. In the case of a globe or a swing-check valve, there is usually one seat, which forms a seal with the disc to stop the flow. In the case of a gate valve, there are two seats; one on the upstream side and the other on the downstream side. A gate valve disc has two seating surfaces that come in contact with the valve seats to form a seal for stopping the flow. To improve the wear-resistance of the seal rings, the surface is often hard-faced by welding and then machining the contact surface of the seal ring. A fine surface finish of the seating area is necessary for good sealing when the valve is closed. Seal rings are not usually considered

Valve Stem The valve stem provides the necessary movement to the disc, plug or the ball for opening or closing the valve, and is responsible for the proper positioning of the disk. It is connected to the valve handwheel, actuator, or the lever at one end and on the other side to the valve disc. In gate or globe valves, linear motion of the disc is needed to open or close the valve, while in plug, ball and Butterfly valves, the disc is rotated to open or close the valve. Stems are usually forged, and connected to the disk by threaded or other techniques. To prevent leakage, in the area of the seal, a fine surface finish of the stem is necessary. There are five types of valve stems: • Rising Stem with Outside Screw and Yoke The exterior of the stem is threaded, while the portion of the stem in the valve is smooth. The stem threads are isolated from the flow medium by the stem packing. Two different styles of these designs are available; one with the handwheel attached to the stem, so they can rise together, and the other with a threaded sleeve that causes the stem to rise through the handwheel. This type of valve is indicated by “O. S. & Y.” is a common design for NPS 2 and larger valves. • Rising Stem with Inside Screw The threaded part of the stem is inside the valve body, and the stem packing along the smooth section that is exposed to the atmosphere outside. In this case, the stem threads are in contact with the flow medium. When rotated, the stem and the handwheel to rise together to open the valve. • Non Rising Stem with Inside Screw The threaded part of the stem is inside the valve and does not rise. The valve disc travels along the stem, like a nut if the stem is rotated. Stem threads are exposed to the flow medium, and as such, are subjected to the impact. That is why this model is used when space is limited to allow linear movement, and the flow medium does not cause erosion, corrosion or abrasion of the stem material. • Sliding Stem This valve stem does not rotate or turn. It slides in and out the valve to open or close the valve. This design is used in hand-operated lever rapid opening valves. It is also used in control valves are operated by hydraulic or pneumatic cylinders. • Rotary Stem This is a commonly used model in ball, plug, and Butterfly valves. A quarter-turn motion of the stem open or close the valve. In the main Menu “Valves” you will find some links to detailed (large) images of Rising and NON Rising Stem valves.


The removable and replaceable valve internal parts that come in contact with the flow medium are collectively termed as Valve trim. These parts include valve seat(s), disc, glands, spacers, guides, bushings, and internal springs. The valve body, bonnet, packing, et cetera that also come in contact with the flow medium are not considered valve trim.

pressure boundary parts because the body has sufficient wall thickness to withstand design pressure without relying upon the thickness of the seal rings.

Valve Stem Packing For a reliable seal between the stem and the bonnet, a gasket is needed. This is called a Packing, and it is fitted with e.g. the following components: • Gland follower, a sleeve which compresses the packing, by Pipes, Pumps and Valves Africa - Jan/Feb 2019


handwheel attached to the valve’s stem or Yoke nut which is rotated clockwise or counter clockwise to close or open a valve. Globe and gate valves are opened and closed in this way. Hand-operated, quarter turn valves, such as Ball, Plug or Butterfly, has a lever for actuate the valve. There are applications where it is not possible or desirable, to actuate the valve manually by handwheel or lever. These applications include:


• Large valves that must be operated against high hydrostatic pressure • Valves they must be operated from a remote location • When the time for opening, closing, throttle or manually controlling the valve is longer, than required by systemdesign criteria

Valves are usually equipped with an actuator a gland into the so called stuffing box. • Gland, a kind of bushing, which compressed de packing into the stuffing box. • Stuffing box, a chamber in which the packing is compressed. • Packing, available in several materials, like Teflon®, elastomeric material, fibrous material etc.. • A backseat is a seating arrangement inside the bonnet. It provides a seal between the stem and bonnet and prevents system pressure from building against the valve pakking, when the valve is fully open. Back seats are often applied in gate and globe valves. An important aspect of the life time of a valve is the sealing assembly. Almost all valves, like standard Ball, Globe, Gate, Plug and Butterfly valves have their sealing assembly based upon shear force, friction and tearing. Therefore valve packaging must be properly happen, to prevent damage to the stem and fluid or gas loss. When a packing is too loose, the valve will leak. If the packing is too tight, it will affect the movement and possible damage to the stem.

Valve Yoke and Yoke Nut Yoke A Yoke connects the valve body or bonnet with the actuating mechanism. The top of the Yoke holding a Yoke nut, stem nut, or Yoke bushing and the valve stem passes through it. A Yoke usually has openings to allow access to the stuffing box, actuator links, etc.. Structurally, a Yoke must be strong enough to withstand forces, moments, and torque developed by the actuator.

Basic actuators are used to fully open or fully close a valve. Actuators for controlling or regulating valves are given a positioning signal to move to any intermediate position. There a many different types of actuators, but the following are some of the commonly used valve actuators: • Gear Actuators • Electric Motor Actuators • Pneumatic Actuators • Hydraulic Actuators • Solenoid Actuators

Classification of Valves The following are some of the commonly used valve classifications, based on mechanical motion: • Linear Motion Valves. The valves in which the closure member, as in gate, globe, diaphragm, pinch, and lift Check Valves, moves in a straight line to allow, stop, or throttle the flow. • Rotary Motion Valves. When the valve-closure member travels along an angular or circular path, as in butterfly, ball, plug, eccentric- and Swing Check Valves, the valves are called rotary motion valves. • Quarter Turn Valves. Some rotary motion valves require approximately a quarter turn, 0 through 90°, motion of the stem to go to fully open from a fully closed position or vice versa.

Yoke Nut

Class Ratings

A Yoke nut is an internally threaded nut and is placed in the top of a Yoke by which the stem passes. In a Gate valve e.g., the Yoke nut is turned and the stem travels up or down. In the case of Globe valves, the nut is fixed and the stem is rotated through it.

Pressure-temperature ratings of valves are designated by class numbers. ASME B16.34, Valves-Flanged, Threaded, and Welding End is one of the most widely used valve standards. It defines three types of classes: standard, special, and limited. ASME B16.34 covers Class 150, 300, 400, 600, 900, 1500, 2500, and 4500 valves.

Valve Actuator Hand-operated valves are usually equipped with a 30

An actuator in the broadest definition is a device that produces linear and rotary motion of a source of power under the action of a source of control.

Pipes, Pumps and Valves Africa - Jan/Feb 2019

Web: www.redstarequipment.com

From the desk of Pamela du Plessis, Managing Director of Invincible Valves

Invincible Valves (Pty) Ltd 33 Shaft Road, Knights, Germiston TEL: +27 (0) 11 822 1777 | FAX: +27 (0) 11 822 3666 EMAIL: enquiries@invalve.co.za | WEB: www.invalve.co.za

South Africa has an abundance of mineral resources which plays a huge role in the local and global economy. Globally we see a mining crisis, which has affected mining regions around the world, but in particular South Africa’s mining sector. Not only are we faced with the global pressures of commodity prices and currency fluctuation, but in South Africa we face additional factors that contribute to the crisis. These would include volatile labour relations, tough government interventions as well as regulatory uncertainty. The impact of Eskom’s load-shedding and rising power costs has an additional adverse effect. Due to many of these factors a number of Mining Companies have been forced to reduce overheads and head office costs, which has resulted in job losses throughout and a rather light operational level staff compliments. Banks in South Africa have been forced to re-assess and track their exposure and proactively manage these, therefore less lending and higher interest rates add to the crisis. With commodity prices having declined significantly over the past months which in turn means fewer are able to meet the risk management requirements. With all that said we should be mindful of the fact that we do indeed have a rich mineral resource country with many opportunities for profitable, successful and sustainable mining in South Africa.

If it's not INVAL®, it's not Invincible

Proven knife gate valves to withstand harsh slurries VALVES

The Krebs® Technequip™ TGW series of wafer-style knife gate slurry valves was designed specifically for the harsh and abrasive slurries encountered in the mineral processing and power industries, dealing with minerals ranging from cement, sand and gravel to coal, phosphate, ash and alumina. Designed as a space saving option for heavy duty applications, the long lasting replaceable elastomer sleeves offer a reliable sealing solution using the latest technology. The valve’s reliable operation is based on its full port design, which allows the gate to be fully isolated by the sleeves from the process in the open position. As the gate closes it pushes between the two sleeves, discharging a small amount of material out of the bottom of the valve. This prevents material build-up in the seat area ensuring full gate closure, as well as preventing damage to the gate. When the gate is in the open or closed position, there is a 100% bi-directional bubble-tight seal and zero downstream leakage. To ensure long life, all valves are supplied with dust boots – or ‘bellows’ – as a standard feature, to protect valve stems and actuators. Hardware such as nuts, bolts, and washers are specially zinc-plated to protect against corrosion. Each component is also individually epoxy-painted before assembly. Several actuation options are available, including pneumatic, hydraulic, electric and bevel-gear actuators, as well as manual hand-wheel operators. Choice of the finest materials is also vital to the valves’ performance, reliability and lifespan. Sleeves are constructed of dense moulded elastomer, complete with an integral stiffener ring moulded into the sleeve. They are also available in a range of different materials to suit the application. The valve housing is ASTM A536 cast ductile coated for corrosion resistance, while the upper cavity is pre-lubricated with a silicone-based grease, to improve actuation and decrease wear. Founded in Toronto, Canada in 1957, Technequip was acquired by FLSmidth in 1993 and integrated into FLSmidth in 2007. With installations across the globe, the slurry valves have proved themselves worldwide with features like their fluorocarbon gate coating for reduced friction during actuation, the high strength stainless steel gate clevis and two-coat epoxy paint. The valves also contain no packing gland, as this can jam the gate, and have machined gate guides so no spacer bars are required. Various accessories are available, including solenoids, limit switches and junction boxes. Willie Van Wyk, Flsmidth (Pty) Ltd Tel: +27 (0)10 210 4820, Email: Willie.vanWyk@flsmidth.com Web: Www.flsmidth.com 32

Pipes, Pumps and Valves Africa - Jan/Feb 2019

THE Krebs® Technequip™ TGW series of wafer-style knife gate slurry valves was designed specifically for harsh and abrasive slurries.



11 - 13 JUNE 2019

Gallagher Convention Centre, Johannesburg, South Africa

ThE largEsT aNd mosT comprEhENsivE africaN TradE show dEdicaTEd To ThE iNdUsTriEs iNvolvEd iN ThE coNvEyaNcE of liqUids, gasEs & slUrriEs

ExpaNd yoUr bUsiNEss iN africa

gENEraTE frEsh lEads

fiNd NEw roUTEs To markET

fiNd oUT aboUT NEw proJEcTs

mEET NEw parTNErs

compaNiEs sUpplyiNg ThE followiNg iNdUsTriEs will ExhibiT: Mining * Construction & Consulting * Water & Waste Water * Petrochemicals * Chemicals Power Generation * Food & Beverage * Agriculture * Pulp & Paper

gUarENTEE yoUr sTaNd locaTioN Contact Dale Magaya to book your stand: dalemagaya@dmgevents.com +27 11 783 7250 Media and association partners:


Co-located with:

Organised by:


Wamechsi Group standardises on SEW solution for its wastewater-treatment equipment Industrial Gear Units and Geared Motors from SEW-EURODRIVE South Africa are ideal for demanding applications such as agitators, mixers, and aerators. Local Original Equipment Manufacturer (OEM) Wamechsi Group has standardised on SEW products for a range of wastewater-treatment plants it has built throughout the country. This is largely due to the quality and reliability of the SEW technology.

Industrial gear units and geared motors from SEW are ideal for demanding applications such as agitat

The OEM manufactures a range of mechanical equipment for the various stages of the treatment process at a wastewatertreatment plant, ranging from mechanical screens to washers and screw presses that wash and compact the material to be removed. Ancillary mechanical equipment includes screw pumps, surface aerators, and clarifiers. The biological aspect of the treatment process results in sludge that is processed further by digesters. The final stage of the treatment process involves removing the sludge 34

Pipes, Pumps and Valves Africa - Jan/Feb 2019

with dewatering machines. Manufacturing equipment for thickening and dewatering applications is a particular area of expertise for Wamechsi Group, CEO Jurie Niemand explains. “We supply turnkey installations, in addition to consulting and aftersales services.� Established in 1997, Wamechsi Group has transformed into the largest OEM of its kind in South Africa at present. Its extensive manufacturing capability includes state-ofthe-art laser and plasma cutting, CNC lathes and milling


Industrial gear units and geared motors from SEW ensure reliable drive solutions for the wastewater

machines, submerged-arc and robotic welding, and ancillary equipment such as twenty-four 5-ton overhead cranes. The OEM acquired its first SEW products in 2012, a long-standing partnership predicated on good design, reliability, quality, and excellent aftermarket support and service, Niemand comments. The OEM’s latest projects to feature SEW products are Virginia Phase Two (six 75 kW Industrial Gear Units specifically for aerators), an additional 22 Geared Motors for Theronia, and 15 Geared Motors for mixers at Buschkoppies. Phase One of the Virginia project has already been completed, while Phase Two is being commissioned. “The main reason that we have been so successful in this industry to date is largely due to our innovation and SEW’s reliable product range,” Niemand explains.

SEW Sales Representative Willem Strydom elaborates that SEW’s extensive experience and track record in the wastewater-treatment industry means it is able to offer flexible and highly-reliable total solutions. It is a leading manufacturer of Industrial Gear Units and Geared Motors, in addition to a large range of optional equipment, which ensures reliable drive solutions for the wastewater-treatment industry. Industrial Gear Units from SEW are ideal for applications where a high performance level is required for mixing and agitating liquid or paste-type substances. Apart from wastewater treatment, it also includes chemicals, food-andbeverage, and mining. With its flexible product platform, SEW offers a load-specific bearing concept. In addition to the transmitted torque, high radial or axial forces are often supported by the output shaft. No matter whether the process is horizontal or vertical, SEW has the expertise to be able to provide the optimal solution.

Industrial gearbox from SEW Eurodrive

“With aerator and mixing applications, our projects and engineering teams have to double check all of the loads and bending moments. These loads are supplied to us by the client, based on their designs. We then ensure that the gearboxes selected are suited to the application at hand,” Strydom highlights. This goes hand-in-hand with commissioning and maintenance support as required. SEW employs a special program designed specifically to determine if the gearbox selection is adequate, based on the loads and bending moments. This is particularly important when it comes to aerators and mixers. SEW therefore selects the optimal gearbox for the application at hand. Commenting on the current state of the wastewatertreatment industry, Niemand stresses it is growing exponentially due to the rapid population expansion and high rate of urbanisation. “The need for infrastructure is coupled to the universal right to access water and sanitation services, which commits the government to significant capex in these sectors.” A major challenge in this regard is that South Africa is classified officially as a water-stressed country, which means that this valuable resource has to be conserved as much as possible. “We are now busy with projects where final effluent is being treated to become potable water. Therefore it is critical for our major component suppliers like SEW to be at the cutting edge of technology,” Niemand points out. “The wastewater-treatment industry not only generates much-needed employment, but is essential for continued economic development, as the country’s residential needs cannot be met without this essential enabling infrastructure being put in place first,” Niemand concludes. SEW, Tel: +27 (0)11 248 7000, Web: www.sew.co.za Pipes, Pumps and Valves Africa - Jan/Feb 2019



Total system focus Variable speed drive (VSD) technology has been around for many years, but over the past decade with the development of new power devices and magnetic materials, the methodology has significantly changed course. This, however, has given rise to substantial confusion by users and specifiers of VSD equipment. Pipes Pumps & Valves Africa finds out more. William Livoti, a senior pump engineer at JK Muir LLC, is on a mission.

technology be applied and what is the best methodology for controlling the speed of the pump.”

Pump system owners, end users, and design engineers, he says, need to learn how their systems should be operating.

For Livoti there is more to the story than just reducing energy consumption, but rather the consideration of total system efficiency, reliability, reduced maintenance cost and life cycle costing as well as choosing the appropriate speed control method.

“There is this huge misnomer that only one particular drive methodology is the way to go,” he says. “That, of course, is due to the creative marketing by many of the manufactures of this technology. But, add to the confusion the difficulty in evaluating efficiency and power factor and the subject of drive selection becomes a daunting task indeed, not to mention reliability, maintenance cost and life cycle costing.” The fact of the matter, says Livoti, is simply this: there is no single type of drive system, which is perfect for all applications. According to Livoti pump manufacturers around the world continue to focus on individual components in an effort to meet efficiency standards as is being dictated by governmental energy departments, but in the process are sidelining the system. “The focus must be on system efficiency,” he says rather than just energy efficiency. “Variable speed pumping is an integral part of pumping processes in the 21st century. Making systems more efficient and cost-effective, the question is when should the

“Adjustment of the pump speed is an efficient way of responding to fluctuations in flow and pressure demand in the system, particularly if the system in question is dominated by friction head,” he explains. “Variable speed drives enable a higher degree of control on the pump speed – adjusting the speed of a single-speed motor to precise levels over a wide range by electrical and mechanical methods. However, there is a misunderstanding within the industrial sector that VSDs are considered practical for situations where the demand changes continuously and with varying increments the sole intent being reducing energy consumption again in a friction dominated system.” Whilst variable frequency drivers have become the speed control solution of choice of the past ten years, Livoti argues that this is not necessarily the best choice.

Fit for purpose Considering that there is no one variable speed solution to

Examples of electro magnetic drives


Pipes, Pumps and Valves Africa - Jan/Feb 2019

fit all applications it is all about the process of identifying, understanding and cost effectively eliminating unnecessary losses while reducing energy consumption and improving reliability in pumping systems. “It is about the entire pumping system solution. In other words a reliable, efficient variable speed solution that fits your specific application,” says Livoti. “This requires using the Life Cycle Costing approach. By specifying the most efficient, reliable system possible the equipment owner can expect optimum reliability and efficiency as well as reduced maintenance cost.” The philosophy, he says, is that improving pump efficiency will do little to reduce pump energy usage. The focus must therefore be on the entire system. According to Livoti it also requires defining clearly what the job at hand is. “Proper drive selection will provide years of reliable service, while poor selection can reap costly down time, lost production, high maintenance cost and wasted energy.” Livoti says with so much of the attention on variable speed control relative to energy efficiency much of the bigger


Showcasing why to use Variable Speed Control in a pumping system as there is more to the story than just energy savings. Slide supplied by William Livoti.

picture is sometimes lost. “Pump speed is critical to over-all system efficiency,” he says and the advantage that VSD brings to the picture is that it can control the speed of a pump to meet the requirements of the system, which in turn can reduce power consumed by less efficient controls that is not an essential requirement of the process. Essentially, VSD increases the entire pump system efficiency by eliminating wasted head across control valves. Using the example of a pump with an operating point of 17 200gpm at 6250 hours per year, friction loss of 50 feet will give efficiency of around 49% while total horse power required will be at least 1777bhp. “If you increase the motor efficiency by 2 points the system efficiency does not improve at all and savings of about R6 930 ($500) are made,” explains Livoti. “Increasing it by 5 points will take the system efficiency to 53% and the savings to around $30 000.” But, he says, if one controls the speed of the pump and reduces the loss across the valves the system efficiency bumps up to 81%, only 800bph is required and savings of more than R2 772 180 ($200 000) are made. “Along with that maintenance costs are dramatically reduced, pump repair costs are less and the process control is optimised providing one with the appropriate Return on investment to justify the project,” says Livoti. There is no doubt that VSDs offer the best solution to control and change pump speed. “When one is looking at the overall system using the right VSD application there are real bottom line savings, certainly reduced energy consumption, improved process control, increased reliability, increased product quality, less mechanical stresses and less electrical stresses,” he says.

An illustration of a steam turbine.

It is important for equipment owners to understand that it is not about the cheapest first cost, but rather the most economical cost for the life of the total system, he says.

Pipes, Pumps and Valves Africa - Jan/Feb 2019



Emerson enables digital capture of plant conditions to drive faster operations and maintenance response Emerson today released AMS Inspection Rounds, a new application for the AMS Trex Device Communicator that will make it easier for operations teams to capture, report, and respond to abnormal plant conditions that pose risks to reliability, safety, and performance.

AMS Inspection Rounds automates workflow for reporting plant safety and performance issues.

The new application allows personnel to accurately record field condition data and automatically deliver that data to other plant systems where decision makers can drive effective action. Most plants rely on manual inspection rounds to detect abnormal plant conditions not identified by sensors. With AMS Inspection Rounds, operators on rounds can electronically record any abnormal or hazardous conditions immediately, such as unusual equipment noise, spills, smells, excessive corrosion, or safety hazards. Condition data can be entered on the ruggedized AMS Trex in realtime—timestamped for compliance and audit requirements. AMS Inspection Rounds delivers condition data to other plant systems via a wired or secure wi-fi connection, eliminating the need for manual entry. It also provides automated workflows to operations and maintenance personnel while they are in the field, ensuring complete, consistent, and repeatable collection of condition data. “Route-based inspections are a key line of defence for


Pipes, Pumps and Valves Africa - Jan/Feb 2019

identifying abnormal and unsafe conditions that may reduce efficiency or put personnel in danger,” said Mani Janardhanan, vice president of product management, Plantweb and reliability solutions, Emerson Automation Solutions. “AMS Inspection Rounds helps ensure that issues impacting safety and reliability are detected, reported, and resolved earlier.” With clear dashboards of routes, status, alerts, and action items, users can identify, schedule, and coordinate steps for resolving issues more quickly. Electronic recording of route data saves hours of time typically lost in transcribing paper notes to electronic media and simplifies the generation of audit trails - freeing personnel to focus on more important tasks. Operations and maintenance teams can also access historical data to identify and eliminate root causes of recurring problems. Rob Smith, Emerson, Tel: +27 (0)11 451 3700, Email: Rob.Smith@emerson.com Web: www.Emerson.com


New SKF solution delivers benefits of condition monitoring to wider applications With condition-based maintenance often reserved for only the most critical assets, SKF has launched a solution that can bring condition monitoring to applications that would previously have been out of reach. Freddy Hernández, Product Line Manager, Surveillance Systems at SKF comments: “Higher asset availability is critical to efficient production. The SKF Multilog IMx-16Plus helps end users achieve this by providing early warning of potential problems. The system is flexible enough to adapt to many process environments and conditions, allowing it to be used across a range of industries. The product is also being constant developed, giving end users the chance to upgrade constantly with new, improved functionality.” SKF Multilog IMx-16Plus features integrated connectivity via mobile data (GPRS and LTE) or Ethernet (RJ45 or Wi-Fi). As well as having 16 analogue inputs – typically for vibration sensors, with the option to accommodate up to eight directly connected temperature sensors, it also has four digital channels, for speed sensor inputs.

SKF has further expanded its offering in condition monitoring with a compact, competitively priced system that is flexible enough to be used across a broad spectrum of applications and industries. The SKF Multilog IMx-16Plus will help more users of rotating equipment to reduce unplanned machine downtime, improve asset availability and optimise machinery operation.

SKF is a leading global supplier of bearings, seals, mechatronics, lubrication systems, and services which include technical support, maintenance and reliability services, engineering consulting and training. SKF is represented in more than 130 countries and has around 17,000 distributor locations worldwide. Annual sales in 2017 were SEK 77 938 million and the number of employees was 45 678.

Condition monitoring has historically been restricted to the most critical assets. However, the SKF Multilog IMx16Plus, which is based on the proven SKF Multilog IMx- 8, allows condition-based maintenance to be integrated in applications that would previously have been too costly to consider. With the ability to monitor everything from a single machine to an entire plant from a central location, the SKF Multilog IMx-16Plus integrates seamlessly with other devices (such as the IMx-8) to allow extensive deployment. The system receives condition-monitoring signals – from vibration or temperature sensors, for instance – to offer early fault detection in industries including wind energy, marine, processing and machine tools. It monitors all types of rotating assets, from pumps and motors to fans and compressors. 40

Pipes, Pumps and Valves Africa - Jan/Feb 2019

SKF, Tel: +27 (0)11 821 3500, Web: www.skf.com

Pumps that solve problems Accurate, versatile chemical pumps Cut chemical costs through higher accuracy metering Simple drop-in installation eliminates ancillary equipment Flow rates from 0.1 to 2000 ml/min and up to 7 bar Fully sealed for life, one minute tool-free maintenance REVOLUTIONARY PERISTALTIC PUMPHEAD

Heavy duty pumps for abrasive slurries Pumps with no seals or valves to wear, clog or leak, up to 100 cubic metre/hr to 16 bar Minimal maintenance - just change the hose Suction lift capability to 9.5 metres, self-priming and dry running Ideal for abrasive products, high viscosities and shear sensitive fluids

watson-marlow.com/za-en info.za@wmftg.com

JOHANNESBURG: Tel: +27 11 796 2960 RUSTENBURG: Tel: +27 14 592 0919 CAPE TOWN: Tel: +27 82 776 2872 LIMPOPO : Tel: +27 82 896 9936

Rotodynamic pumps


How does axial thrust compare amongst different impeller types for a rotodynamic vertical pump? The net axial downthrust force is carried by the pump shaft. The shaft will stretch, i.e., elongate, under this load. Before the pump starts up, any stretch that occurs is due to rotor weight, the sum of the static forces. The thrust load will increase after the pump starts up due to the addition of the dynamic forces. The dynamic forces creating thrust on a vertical turbine pump enclosed impeller (Figure 1) are due to the difference in pressure distributions on the upper and lower shrouds along with the force from the change in momentum of the flow through the impeller.

Figure 2: Semi-open impeller

Figure 1: Enclosed impeller plain top shroud

The semi-open impeller (Figure 2) has only an upper shroud. The difference in pressure distributions along both the backside and the vaned side of the shroud is typically greater than between upper and lower shrouds of an enclosed impeller. Semi-open impeller axial thrust is higher than that of the enclosed impeller.


The axial flow pump impeller (propeller) has no upper or lower shroud; vanes are attached directly to the hub. The axial thrust generated is primarily from dynamic forces created by interaction of the propeller vanes with liquid.

Figure 3: Enclosed impeller with back ring and balance holes.

The impeller back ring with balance holes configuration (Figure 3) reduces the axial thrust. Back rings may be cast integrally into impellers with a top shroud. They are used when pump total axial thrust requires reduction. The flow through balance holes in the impeller hub shroud, combined with the leakage past the balance ring, reduces efficiency.

The exact efficiency reduction depends on the individual design and pump size and specific speed. The effect of increased leakage through clearances due to wear of the back ring arrangement may be an increase in downthrust and should be considered in sizing the thrust bearing.

Pipes, Pumps and Valves Africa - Jan/Feb 2019

What is a foot valve? In what pumping application would one be used? Foot valves are specially designed check valves used at the inlet of the suction lift line to maintain pump prime, by maintaining liquid over the first-stage impeller (Figure 1) Foot valves are designed to open with very little pressure differential across the valve.

Problems with leakage and failure to close may be encountered where solids are present in the liquid. Therefore, foot valves may be limited to pump installations where pump nonperformance due to foot valve failure does not place the user at high risk. It is important to note that unless a suction pressure relief is fitted, pumps must have the suction side designed to contain the maximum allowable working pressure of the pump, plus any hydraulic shock loading or water hammer due to sudden foot valve closing. In vertical pumps, foot valves may be used at the inlet of the bowl assemblies for well pumps to keep the column pipe filled, to prevent backspin, and prevent well disturbance from rapidly draining water. This practice is very limited and occasionally used on small, less than 5-hp (3.7-kW)


They should be installed in a vertical orientation (or they may not work), below the top of the waterline, and the end of the inlet (suction) line should be at least four pipe diameters below the top of the water level. This will maintain a primed condition in the inlet line. The foot valve and pipe should be sized to minimize inlet line losses that will maximize the NPSH available to the pump.

Figure 1

pumps, with less than 100-ft (30-m) settings and 50-psig (345-kPa) surface pressure. The user is also encouraged to check with the vertical turbine manufacturer for warranty ramifications when using a foot valve.

How can I monitor the level of corrosion within a rotodynamic pump? Corrosion monitoring is an important aspect of maintaining a pump’s reliability. Visual inspection is the easiest and most economical method of monitoring corrosion, and most forms of corrosion can be detected by this method. However, stress corrosion cracking usually occurs without any visible signs, thus resulting in a sudden and sometimes catastrophic failure.

(LPR), and corrosion by ultrasonic thickness measurement (UTM). Checking corrosion by ER involves taking a measurement of the increasing electrical resistance of a metal probe as its cross section is reduced by corrosion. ER probes can provide a reasonable degree of accuracy for general corrosion but they are not useful for localized forms of corrosion, such as pitting.

Visual inspection of pump internals can reveal the degree of general corrosion occurring as well as signs of localized corrosion, such as pitting and crevice corrosion. Particular attention should be given to complete inspection of fasteners as corrosion often takes place in areas hidden from view. Pressure boundary leakage may expose nonwetted fasteners to corrosive pumpage.

Checking corrosion by LPR involves the measurement of a current response to an applied potential through probes that are inserted in the system. A small known pulse of DC voltage is supplied to a test electrode and the resulting current is measured. The current generated is proportional to the corrosion rate, which can be determined by electrochemical principles. To use the LPR method, a conductive liquid is required.

Visual inspection can be supplemented with dimensional checks of key components, which can then be used to calculate the amount of general corrosion that the pump is experiencing. Because most pump manufacturers provide a corrosion allowance in the design of their equipment, the amount of dimensional change over a given time increment can be projected into the remaining life of the pump. Other methods of monitoring include corrosion by electrical resistance (ER), corrosion by linear polarization resistance

Although not as accurate as the other methods, UTM can also be used to monitor corrosion on a periodic basis. To use this method, a baseline reading should be obtained at a specific location on the pump casing or cover plate. Then a series of measurements can be made at this same location over time and the metal loss per unit time calculated. Source: Hydraulic Institute www.pumps.org Pipes, Pumps and Valves Africa - Jan/Feb 2019



SAM Engineering KSB (Pty) Ltd

Cyclone Industries

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

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

T: +27 (0) 11 821 5900 F: +27 (0) 11 825 7707 E: reception@cyclonesa.co.za W: www.cyclonepumps.co.za

T: +27 (0) 11 873-8620 F: +27 (0) 11 825-1401 E: wme@mweb.co.za W: www.versaflo.co.za

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

Unique Engineering Walter Meano Engineering VersaFlo VSE Pumps

Unique Engineering

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

APE Pumps T: +27 (0) 11 824-4810 F: +27 (0) 11 824-2770 E: apepumps@mweb.co.za W: www.apepumps.co.za MULTISTAGE PUMPS

C.R.I Pumps S.A. (Pty) Ltd T: +27 (0) 11 805-8631 F: +27 (0) 11 805-8630 E: cri@cripumps.co.za W: www.cripumps.co.za


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

T: +27 (0) 11 821 9000 E: wendyb@za.atlascopco.com W: www.atlascopco.co.za END SUCTION PUMPS

Franklin Electric T: +27 (0) 11 723-6500 E: info@franklin-electric.co.za W: www.franklin-electric.com PLUNGER PUMPS

FLSmidth Krebs T: +27 (0) 10 210-4750 E: willie.vanwyk@flsmidth.com W: www.flsmidth.com SUBMERSIBLE PUMPS

SAM Engineering Franklin Electric T: +27 (0) 11 723-6500 E: info@franklin-electric.co.za W: www.franklin-electric.com

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

Hawk High Pressure Pumps T: +27 (0) 031 274-8555 +27 (0) 10 010-0144 F: +27 (0) 31 205-4332 +27 (0) 11 822-2868 E: sales@hawkpumps.co.za W: www.hawkpumps.co.za

Franklin Electric T: +27 (0) 11 723-6500 E: info@franklin-electric.co.za W: www.franklin-electric.com


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

T: +27 (0) 031 274-8555 +27 (0) 10 010-0144 F: +27 (0) 31 205-4332 +27 (0) 11 822-2868 E: sales@hawkpumps.co.za W: www.hawkpumps.co.za HORIZONTAL SPLIT CASE PUMPS

Ernest Electro Engineering

T: +27 (0) 031 274-8555 +27 (0) 10 010-0144 F: +27 (0) 31 205-4332 +27 (0) 11 822-2868 E: sales@hawkpumps.co.za W: www.hawkpumps.co.za

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

Stewarts & Lloyds (Pty) Ltd T: +27 (0) 11 917-0778 F: +27 (0) 11 917-0769 E: peterk@sltrading.co.za W: www.stewartsandlloyds.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

T: +27 (0) 11 792 9550 E: eeeaman@mweb.co.za W: www.ernestee.co.z 44

Hawk High Pressure Pumps


Atlas Copco T: +27 (0) 11 821 9000 E: wendyb@za.atlascopco.com W: www.atlascopco.co.za

KSB (Pty) Ltd

Hawk High Pressure Pumps

Pipes, Pumps and Valves Africa - Sep/Oct 2018

Cyclone Industries T: +27 (0) 11 821 5900 F: +27 (0) 11 825 7707 E: reception@cyclonesa.co.za W: www.cyclonepumps.co.za

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





Tectra Automation C.R.I Pumps S.A. (Pty) Ltd T: +27 (0) 11 805-8631 F: +27 (0) 11 805-8630 E: cri@cripumps.co.za W: www.cripumps.co.za


Air & Vacuum Technologies T: +27 (0) 861 822-832) +27 (0) 11 318 3241/2/3/4/5 F: +27 (0) 86 522-9188 E: burnm@vactech.co.za W: www.vactech.co.za

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

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) 11 453-7537 F: +27 (0) 11 453-6056 E: valconsa@iafrica.com Web: www.valcon.co.za

Pleix-Quip T: +27 (0) 11 736 4994 F: +27 (0) 11 736 6130 E: tiaans@pleixquip.co.za Web: www.pleixquip.co.za BUTTERFLY VALVES

Atlas Copco T: +27 (0) 11 821 9000 E: wendyb@za.atlascopco.com W: www.atlascopco.co.za VERTICAL SUMP 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

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


Valcon Valve & Controls

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

T: +27 (0) 11 971-9400 F: +27 (0) 11 971-9440 E: malan.bosman@tectra.co.za W: www.hytecgroup.co.za

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

Pleix-Quip T: +27 (0) 11 736 4994 F: +27 (0) 11 736 6130 E: tiaans@pleixquip.co.za Web: www.pleixquip.co.za CONTROL VALVES

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

Ainsworth Valves T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

T: +27 (0) 11 838-4028 C: +27 (0) 82 823-7703 E: thanesh.padayachee@macsteel.co.za W: www.macsteel.co.za

VAG-Valves South Africa Klamflex Pipe Couplings

C.R.I Pumps S.A. (Pty) Ltd T: +27 (0) 11 805-8631 F: +27 (0) 11 805-8630 E: cri@cripumps.co.za W: www.cripumps.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


T: +27 (0) 21 987 8292 C: +27 (0) 81 555 5288 E: clinton@kaytarvalves.co.za Web: www.kaytarvalves.co.za

T: +27 (0) 11 736 4994 F: +27 (0) 11 736 6130 E: tiaans@pleixquip.co.za Web: www.pleixquip.co.za

T: +27 (0) 11 762-5326 F: +27 (0) 11 762-5674 E: o.galazka@vag-group.com W: www.vag-group.com DIAPHRAGM VALVES

Ainsworth Valves T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

Pipes, Pumps and Valves Africa - Sep/Oct 2018



Mine Track & Tools (Pty) Ltd T: +27 (0) 11 412 4536/1665 E: info@minetrack.co.za W: www.minetrack.co.za

Mine Track & Tools (Pty) Ltd T: +27 (0) 11 412 4536/1665 E: info@minetrack.co.za W: www.minetrack.co.za PINCH VALVES

Valcon Valve & Controls 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

T: +27 (0) 16 976-1787/8/9 E: info@everyseal.com W: www.everyseal.com

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 REPAIR VALVES

Ainsworth Valves Everyseal T: +27 (0) 16 976-1787/8/9 E: info@everyseal.com W: www.everyseal.com KNIFE GATE VALVES



T: +27 (0) 11 838-4028 C: +27 (0) 82 823-7703 E: thanesh.padayachee@macsteel.co.za W: www.macsteel.co.za PIPES


T: +27 (0) 11 821 5900 F: +27 (0) 11 825 7707 E: reception@cyclonesa.co.za W: www.cyclonepumps.co.za

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

T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

Everyseal T: +27 (0) 16 976-1787/8/9 E: info@everyseal.com W: www.everyseal.com SAVETY & RELIEF VALVES

T: +27 (0) 16 976-1787/8/9 E: info@everyseal.com W: www.everyseal.com

T: +27 (0) 11 453-9741 F: +27 (0) 11 453-9894 E: reshmita.singh@rotork.com Web: www.rotork.com HYDRAULIC TOOLS

Kiloton T: +27 (0) 861 707-707 F: +27 (0) 861 707-706 E: sales@kiloton.co.za W: www.kiloton.co.za W: www.onlinetoolshop.kiloton.co.za MANUAL

Tectra Automation T: +27 (0) 11 971-9400 F: +27 (0) 11 971-9440 E: malan.bosman@tectra.co.za W: www.hytecgroup.co.za MECHANICAL PACKING


Invincible Valves (Pty) Ltd

T: +27 (0) 11 838-4028 C: +27 (0) 82 823-7703 E: thanesh.padayachee@macsteel.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 46

Ts & Cs

Macsteel Everyseal

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

T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

T: +27 (0) 11 453-7537 F: +27 (0) 11 453-6056 E: valconsa@iafrica.com Web: www.valcon.co.za PLUG VALVES


Cyclone Industries

Ainsworth Valves

Pipes, Pumps and Valves Africa - Sep/Oct 2018

Agrico T: +27 (0) 21 950 4111 F: +27 (0) 21 950 4208 E: alfred.andrag@agrico.co.za W: www.agrico.co.za HOSES


Chick Henderson T: +27 (0) 11 640-1400 F: +27 (0) 624-1432 E: rob@chickhenderson.co.za W: www.chickhenderson.co.za FOUNDRIES

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

KLINGER South Africa T: +27 (0) 11 842-8300 F: +27 (0) 11 827-8663 E: gareth.langton@klinger.co.za W: www.klinger.co.za

Viking Foundry (Pty) Ltd

Directors: W. Fourie (Chairman), N.P. Mnxasana (Non Exec) R Kruger, R. Dye, G.M. Scrutton Branch Manager: R. Dye Company Secretaries: Winhold Limited Reg No 1945/0196

T: +27 (0) 11 873-5093 F: +27 (0) 11 873-5695 E: sales@vfdy.co.za W: www.vikingfdy.co.za

+27 (0)11 383 4000 48

Pipes, Pumps and Valves Africa - May/Jun 2018

Profile for Lifting Africa

Pipes, Pumps & Valves Africa Jan-Feb 2019  

Pipes, Pumps & Valves Africa Jan-Feb 2019