GRUNDFOS CR RANGE
INNOVATION INSIDE
Innovation inside
For Grundfos to bring you the CR of today, we consulted with professional pump users and buyers to ask them what improvements they would like to see made to multistage pumps. During our discussions a few troublesome elements came up repeatedly, so we set about putting them right. Because you asked for it Active dialogue with customers and users further focused our attention
on the areas of most importance to you. As a direct result, the advancements we can present here provide: • Superior reliability • Unmatched cost of ownership • The most extensive range on the market By continually anticipating and meeting the increasingly rigorous demands set by the market, Grundfos has built a reputation as a trend-
setter in the pumping industry. Ongoing investments in research and development ensure that we can maintain this position. In multistage centrifugal pumps, the CR has now been leading the way for more than 25 years. Make no mistake about it. The new generation of CR pumps will make a visible difference which you will appreciate. Innovation is at the very core of the CR concept – therefore Innovation inside.
Grundfos motor Grundfos’ own MG motors feature a low noise level and high efficiency. Available in the self-regulating MGE configuration with integrated frequency converter.
Cartridge shaft seal Grundfos developed the cartridge seal to increase reliability and enable easy service and access.
Shaft seal solutions The cartridge configuration comes in a wide choice of materials and as a flushed seal, double seal and magnetic drive. Temperature range from -40ºC to +180ºC.
Connection options A broad range of connections match any system requirement.
Dry-running sensor The Grundfos LiqTec™ constantly checks that there is liquid in the pump, eliminating the risk of breakdown from dry-running.
High-performance hydraulics Grundfos’ state-of-the art hydraulic design and production technology optimise pump efficiency.
Durable bearings Hard-wearing materials and a wide choice of options for difficult liquids enhance the service life of CR bearings.
Material options Four different material options are available for parts in contact with the pumped liquid: titanium, stainless steel AISI 316, stainless steel AISI 304 and AISI 304/cast iron.
Dry-running is the cause of 25% of pump-related stoppages
Superior protection measures ensure double reliability
Hard-wearing and intelligent technology is no liquid present, LiqTec™ stops the pump. So in one easy move you can eliminate the risk of damage from dry-running altogether.
The CR has always been renowned for its high reliability. As we continually seek to improve the CR, we think beyond just building a pump. We take a share of the responsibility for ensuring that whatever the conditions our pumps are put under – no matter how extreme or adverse – the right choice of pump will give the same degree of reliability. Dry-running now a thing of the past Any concern you might have about your pump running dry is real enough. As many as 25% of pump breakdowns are caused by exactly that – the most common cause of all pump failures. Soon after liquid stops flowing in the pump, the shaft seal and bearings are burned out. You almost have to be right next to the pump to stop it in time. We have not given up on developing the shaft seal and bearing which will never wear out. When we have them, you will be the first to know. However, by testing new and alternative materials, we can equip CR pumps with a shaft seal and bearing system which can withstand extreme heat and fric-
Superior reliability with the unique cartridge seal Hard-wearing seal materials prevent unnecessary and prolonged downtime in your system. Seal reliability is also enhanced by the cartridge design since there is no risk tion longer. This makes them a little less unforgiving if the pump does run dry. Or even better, we can offer a way to avoid dry-running altogether! Grundfos LiqTec™ – a finger on the switch The only sure way to prevent the disastrous consequences of dryrunning is to have a finger on the switch at all times. With LiqTec™, Grundfos has designed such a finger and made it available as an option on all CR pumps. LiqTec™ is plug-and-play dry-running protection which constantly checks that there is liquid in the pump. The instant the sensor detects that there
Grundfos LiqTec™ keeps a constant eye on whether there is liquid in your CR. And if there isn’t, it stops the pump immediately.
of assembling the seal components wrongly, preloading the spring incorrectly or getting greasy fingers and dirt on sensitive surfaces. These would all shorten the life of the seal significantly. The cartridge design also enables fast replacement when the seal finally does need changing. All in all, production stoppages are minimised, and this translates into sig-
nificant savings in both the short and long term.
proof, but extreme conditions require extreme measures.
Titanium – never corrodes As fast as the ferrous metals in a pump corrode at the hands of saline liquids, so too does pump reliability and efficiency. After dry-running, corrosive liquid is the next most common cause of shortened pump life. High-grade stainless steel goes a long way to making CR corrosion-
The CR is the only pump of its kind which comes in a full-titanium variant – CRT. Titanium is totally corrosion-free. Not even a decade of full immersion in salt water will leave a blemish on the metal surface.
Within minutes you can remove the old seal, put in the new cartridge and set the pump running again. All this without special tools, and with a Grundfos CR you do not need to dismantle the pump. Moreover, motors over 35 kg can be left in place during seal replacement.
Electricity is the most expensive part of a pump
CR cuts power consumption by more than 20% * Calculation based on CR 5
Liquids from A to B at the lowest possible price Only the tip of the iceberg is visible above the surface. It is easy to navigate around these bits. But it is the jagged edges beneath the surface which rip holes in the bottoms of ships. Electricity – 85% of lifetime cost The cost of owning a pump is a bit the same. Less than 15% of the
total lifetime cost of a hardworking pump is the more visible purchase price and maintenance costs. But the pump’s power consumption lurks below the surface and can threaten the bottom line of an otherwise sound project.
this is important enough in itself. When your pumps are running many hours a day, a 10 percentage point increase in pump efficiency will quickly transform into a costsaving measure which can be repeated month after month for the entire life of the pump.
Energy consumption is not just an issue of CO 2 emissions – although
Pump efficiency [%]
Grundfos CR
80
70
60
50
40
30
20
10 0.05 0.6 0.7 0.8
1
2
3
4
5
6 7 8
10
20
30
40
50 60 70 80 100
Q [m3/h]
How much difference does a CR actually make? Application type
Typical duty point
Water supply
80 m3/h at 6 bar
24 hours
18500 kWh
Boiler feed
40 m3/h at 15 bar
15 hours
12700 kWh
Water treatment
2 m3/h at 15 bar
15 hours
3200 kWh
3
Operating hours per day
Average kWh reduction per year with CR
Industrial washing & cleaning
6 m /h at 15 bar
5 hours
1600 kWh
General industrial pump task
6 m3/h at 10 bar
10 hours
2200 kWh
The low lifetime cost of owning a CR is unmatched.
Pump efficiency 70
60
50
%
The right size for the job The narrow interval between CR pump sizes increases overall efficiency because the tighter overlap erases the efficiency drop experienced with over-dimensioned pumps. By minimising the difference between pump capacity and the required system pressure and volume, you get a pump which runs closer to its optimal duty point.
40
30
20
10
Physics theory behind real improvement Extremely small margins make all the difference to pump efficiency levels. The laws of fluid dynamics have therefore been studied carefully to find new ways of improving CR efficiency. The result of this intense development work is an increase in pump efficiency of 10 percentage points. Firstly, internal leakage caused by the pressure differentials within the pump were minimised. Tests and calculations have shown that an impeller seal clearance gap of 1/10 mm between the impeller and the chamber in a pump equivalent to a CR 3 results in a 5% drop in efficiency (see graph). To reduce internal leakage to an absolute minimum, Grundfos now uses a floating seal ring between chambers, providing a close to perfect seal. Secondly, enhanced impeller design has resulted in a more streamlined flow in the impeller and reduced eddy flow and friction loss. Since such small margins of error are involved, Grundfos has developed highly specialised laser-welding
0
1
2
m3/h
3
4
5
Zero impeller seal clearance gap (theoretical) 1/10 mm impeller seal clearance gap 3/10 mm impeller seal clearance gap
State-of-the-art technology ensures a minimum of leakage in the pump and optimises efficiency.
State-of-the-art laser-welded impeller.
technology which operates at incomparable levels of accuracy. With this technology at our disposal, impeller design and construction are fine-tuned to the point of theoretical perfection.
often means that a smaller motor can be used to power the pump at any given duty point. A smaller motor represents a reduction in both capital investment and running costs.
Thirdly, a higher Nq has been achieved by a small reduction in the pressure generated in each pump stage.
By continuing to apply new and existing knowledge, the team behind the CR is setting the standard for multistage pump efficiency and performance.
All in all, the 10 percentage point increase in pump efficiency very
Limited pump programmes restrict your opportunities
CR offers individual solutions for individual needs
If anyone has the right pump, we do For systems requiring up to 120 m3/ hour at up to 40 bar, you can’t afford to ignore Grundfos. The CR programme is the most extensive and comprehensive on the market today, featuring ten pump sizes with four basic material options in thousands of configurations. The CR range of pumps is fine-tuned to include many sizes with a narrow interval between each size. This makes it easier to pinpoint the pump which exactly matches the
CR Stainless-steel AISI 304 with cast-iron top and base
demands of your system – no more and no less. By avoiding over-capacity in the pump, the already impressive energy saving of a CR is boosted even more. The range of options is further widened by the energy-efficient CRE pumps, which have an integrated frequency converter and pressure sensor. The electronic sensor monitors pressure in the pipeline, and the frequency converter
CRI All stainless-steel AISI 304
then automatically regulates motor speed. In this way, output is optimised in response to changing conditions in the system. The entire CR programme is available in the CRE configuration. Choice of materials is crucial A range of alternative materials is available to adapt the CR to handle the wide variety of liquids encountered today – from drinking water to aggressive industrial liquids.
CRN All stainless-steel AISI 316
Non-corrosive liquids The CR is made of stainless steel AISI 304 and top-quality cast iron. The CRI is an all stainless-steel pump. The CR and CRI are primarily intended for pumping water and other non-corrosive liquids. Aggressive liquids High-grade AISI 316 stainless steel is used in the CRN to withstand aggressive industrial liquids. Saline liquids The CRT is made of titanium and is therefore totally corrosion-free in saline liquids – unlike any other
CRT All titanium
pump of its kind. Only the CRT can offer such high levels of reliability under such uncompromising conditions. Custom-built CR – ask and you shall receive The standard CR range is supplemented by a custom-built programme which is anything but standard. An entire development team is dedicated to custom-building CRs to cover applications which are out of the ordinary. By working together with users, we have been able to provide unique solutions which could then be incorporated
into the custom-built programme. Over the years, many users of multistage pumps have contacted us with difficulties they were experiencing in specific pumping situations. We welcome this contact, which will set the foundation for expanding the CR programme in the future.
Aggressive or corrosive liquids
Seawater, hypochlorites, hydrochloric acid, ferric chloride, nitric acid, chromic acid, phos phoric acid
Abrasive liquids
Metasilicate-containing cleaning agents, abrasive alkaline cleaners, phosphates
Toxic or explosive liquids
Trichloroethylene, toluene, petrol, ethyl alcohol, methyl alcohol
High-viscosity liquids
Glycols, carboxylates (for cooling), lubricating oils, rapeseed oil
Hardening liquids
water-based paint, glue, vegetable oils
Crystallising liquids
Glycol additives, naphthalene, sugar products (e.g. dextran), salts
High pressures
Water treatment, cleaning/washing
Extreme temperatures
Petrochemicals, oils, boiler feed, secondary coolants
By finding the right combination of motor size, shaft seal, pump materials and bearing materials, a CR can be configured to cope with a multitude of difficult media.
Understanding The most important part of the innovation process is understanding our customers – what demands you place on a pump and how your processes work. Only then can we apply our extensive knowledge of materials, pumps and pumping systems to design the right pump for you.
Design With focus firmly on user needs, some of the best engineers in the business design and incorporate new elements which build on Grundfos’ innovative history. We aim to live up to our reputation for supplying the most reliable pumps, for being leaders in pump technology and for building pumps our customers need. This is your guarantee of the quality of our work.
Testing The design process is not finished until the pump has proven its worth in the context it is intended for and under extreme conditions. To put it bluntly, we thrash our pumps until something gives. And then we fix the “weakness” so it won’t happen again.
Production Grundfos practises tight control over every aspect of the production system. Nothing is left to chance, because these are the pumps you will be using. Before leaving the factory, each and every pump is tested to ensure that it lives up to the highest standards. All our production facilities meet the same quality and environmental standards – wherever they are in the world.
Technical support To help you find and commission the right pump for your system, Grundfos offers technical support which aims to be second-to-none. In our companies all over the world, the right people are always on hand to provide after-sales service and training.
Reliability is the hallmark of a Grundfos pump. The materials and components used make the CR a pump which you can rely on from day to day without infuriating breakdowns. And you can rely on it to have a long life in your system.
Securing top performance
Performance curves H [m]
50 Hz
400 300 CRNE 1 HS
CRNE 3 HS
CRN 8 SF
CRN 16 SF
2 xC 2 x C R 32 RN 32
2x C 2 x R 45 CRN 45
200
2x 2 x CR 6 CR 4 N6 4
2x 2 x CR C R 90 N9 0
100 80 60
CR 3
CR 8
CR 32
CR 64
CRI 3
CRN 8
CRN 32
CRN 64
CRN 3
40 30
CR 1
CR 5
CR 16
CR 45
CR 90
CRI 1
CRI 5
CRN 16
CRN 45
CRN 90
CRN 1
CRN 5
20 0.18 1
2
3
4
5
6
8
10
20
30
40 50 60
80 100
Q [m3/h]
0.18 1
2
3
4
5
6
8
10
20
30
40 50 60
80 100
Q [m3/h]
[%] 80 60 40 20 0
Technical data CR 1
CR 3
CR 5
CR 8
CR 16
CR 32
CR 45
CR 64
CR 90
Range: Nominal flow (m3/h) Flow range (m3/h) Max. pump pressure (bar) Motor power (kW) Temperature range (째C) Max. pump efficiency (%)
1
3
5
8
16
32
45
64
90
0.5-2
1.5-4
2.5-7.5
6-12
8-22
15-40
22-58
30-85
45-120 20 (39)
22 (47)
24 (47)
24
22 (42)
23 (44)
28 (39)
26 (40)
20 (39)
0.37 - 2.2
0.37 - 3
0.37 - 5.5
0.37 - 7.5
2.2 - 15
1.5 - 30
3 - 37
4 - 37
5.5 - 45
-20 to +120
-20 to +120
-20 to +120
-20 to +120
-20 to +120
-30 to +120
-30 to +120
-30 to +120
-30 to +120
(-40 to +180)
(-40 to +180)
(-40 to +180)
(-40 to +180)
(-40 to +180)
(-40 to +180)
(-40 to +180)
(-40 to +180)
(-40 to +180)
48
58
66
64
70
78
79
80
81
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Version: CR (AISI 304/Cast Iron)
x
x
x
CRI (AISI 304)
x
x
x
CRN (AISI 316)
x
x
x
x
x
CRT (Titanium)
x
x
x
x
x
x
x
CRN-HS
x
x
CRN-SF
(x)
(x)
CR pipe connection: BSP (Internal thread) Flange
1" & 1 1/4"
1" & 1 1/4"
1" & 1 1/4"
1 1/2" & 2"
DN25 & DN32
DN25 & DN32
DN25 & DN32
DN40
DN50
DN65
DN80
DN100
DN100
(DN80)
(DN100)
(DN125)
(DN125)
CRI pipe connection: BSP (Internal thread)
1" & 1 1/4"
1" & 1 1/4"
1" & 1 1/4"
Flange (DIN, JIS, ANSI)
DN25 & DN32
DN25 & DN32
DN25 & DN32
PJE (Victaulic)
x
x
x
Clamp
x
x
x
Union (++GF++)
x
x
x
DN25 & DN32
DN25 & DN32
DN25 & DN32
CRN pipe connection: Flange (DIN, JIS, ANSI)
DN40
DN50
PJE (Victaulic)
x
x
x
x
x
Clamp
x
x
x
x
x
Union (++GF++)
x
x
x
x
x
x
x
x
x
x
CRT pipe connection: PJE (Victaulic)
DN65
DN80
DN100
DN100
(DN80)
(DN100)
(DN125)
(DN125)
(x)
(x)
(x)
(x)
being responsible is our foundation thinking ahead makes it possible
www.grundfos.com
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innovation is the essence