548286 1 Grundfos Centrifugal Pump Manual

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1GRUNDFOS CR
GRUNDFOS CR RANGE
CUSTOMIZED SOLUTIONS
2GRUNDFOS CR 3GRUNDFOS CR
Welcome to the Grundfos world of customized pumps...
High pressure applications
Main applications
• Filtration
• Reverse osmosis
• Steam boiler feeding
• Washing & cleaning
• Industrial processes
High-pressure pumps are subject to demanding operating conditions. High pressure causes increased wear on pump parts and
reduces pump life. To avoid unexpected downtime, we provide special pump and shaft seal designs, bearings, etc.
Situation Consequence Solution See
page
High system pressure
Reduced life of shaft seal Use special CRN-high pressure or
CRN-high speed 11
Pump breakage Use reinforced pump design to handle
up to 725 psi 11
High pump pressure Too many stages to reach desired
pressure, i.e. pump too tall
Use special CRN-high pressure or
CRN-high speed 11
Limited space for installation Pump is too high and may not fit into
installation area
MLE high-speed motor solution or
horizontal design and bracket mounting
6
10
Varying frequencies and voltages
around the world
Need for different frequencies and
voltages
Choose among our wide range of motors
with different frequencies and voltages 6
Hot liquid applications
Main applications
• Steam boiler feed
• Washing & cleaning
• Mineral oils
• Industrial processes
• Chemical industries
Hot water exposes pumps to operating conditions which may lead to cavitation and/or cause wear on pump parts, thus reducing
pump life. To avoid downtime we provide solutions for steady steam production, poor inlet conditions, hot temperatures, etc.
Situation Consequence Solution See
page
Poor inlet conditions Risk of cavitation Use low NPSH pump to reduce
NPSH curve 10
High temperature Shaft seal destroyed Special Grundfos shaft seal designed to
handle hot liquids up to 356°F 9
Fluctuating steam demand Pump performance must adapt CRE, speed controlled pumps 6
Limited space for installation Pump is too tall and may not fit into
installation area
MLE high-speed motor solution or
horizontal design and bracket mounting
6
10
Varying frequencies and voltages
around the world
Need for different frequencies and
voltages
Choose from our wide range of motors
with different frequencies and voltages 6
The Grundfos CR pump range
The basic CR pump range, which applies to almost any indus-
trial solution, is in itself the broadest range available. With our
modular approach, we have made it even broader.
The basics
The basic CR pump range is available in four different mate-
rials − including cast iron, two grades of stainless steel, and
all-titanium versions − in 13 flow sizes, capable of producing
almost 725 psi of pressure, and with a variety of shaft seals, rub-
bers, and supply voltages.
In order to make the CR pumps suitable for even more indus-
trial applications, we have redesigned some of the vulner-
able pump parts to enable them to handle difficult liquids or
demanding operating conditions. The modular concept of the
CR pump range makes it possible to put together a specialized
pump for any particular application by selecting the modules
best suited for the job from the existing, comprehensive
range of module variants.
The modular approach
At Grundfos, we look at the CR pump range as a building
system with four interrelated modules including:
Motors - page 6-7
Seal arrangements - page 8-9
Pump parts - page 10-11
Other options - page 12-13
All modules described are tested, qualified, documented and
proven, just like any standard Grundfos pump. You can mix
and match to suit almost any pump requirement to handle
aggressive, abrasive, toxic, explosive, hardening, crystallizing
or otherwise difficult liquids.
If your installation has specifications such as limited space,
earthquake risk, high altitude, certification requirements, sur-
face roughness, special connections, or you simply want the
pump in your company colors – it’s all at hand with the CR
pump range.
Adding up all CR pump variants available, we have passed one
million – and counting!
4GRUNDFOS CR 5GRUNDFOS CR
Difficult liquid applications
Main applications
• Chemical industries
• Pharmaceutical industries
• Petrochemical industries
• Refineries
• Distilling plants
• Paint industries
• Mining
When pumping dangerous and aggressive liquids, safety is critical. We provide solutions for aggressive and abrasive liquids,
hazardous and hardening liquids, and flammable liquids.
Situation Consequence Solution See
page
Abrasive liquids Excessive wear of shaft seal faces Use double shaft seal
(tandem or back-to-back) 8
Toxic liquids Contamination of environment or
people Use MAGdrive or double shaft seal 8/9
Flammable liquids Risk of explosion or fire Explosion-proof motor for
explosive environments 6
Crystallizing liquids Leakage due to crystallization between
shaft seal faces
Double shaft seal
(tandem or back-to-back) 8
Aggressive liquids Corroded pump metal parts or
swollen rubber
Special material (e.g. titanium and
resistant rubber) 8/9
Temperature control
Main applications
Cooling systems for:
• Electronic data processing
• Laser equipment
• Medical equipment
• Industrial cooling and freezing processes
Pumps used in applications involving temperature control are exposed to
very low, very high, or fluctuating temperatures. These extremes stress
the materials due to thermal expansion or contraction.
Situation Consequence Solution See
page
Secondary refrigerants Standard pumps cannot handle very low
temperatures
Special pump capable of handling
liquids down to -40°F 10
Thermal oils Very high temperatures Special shaft seal designed to handle oil
up to 464°F 9
Viscous or dense liquids High viscosity or liquid density causes
motor overload Oversize motor 7
Temperature control Adapt pump performance CRE, speed-controlled pumps 6
Explosive environment Risk of explosion or fire Explosion-proof motor 6
Limited space for installation Pump is too tall and may not fit into
installation area
MLE high-speed motor solution or
horizontal design and bracket mounting
6
10
Varying frequencies and voltages
around the world
Need for different frequencies and
voltages
Choose from our wide range of motors
with different frequencies and voltages 6
Hygienic applications
Main applications
• Pharmaceutical industries
• Biotechnological industries
• Food and beverage
• Chemical processes
Pumps used in industries where hygienic production is crucial have to comply with strict requirements around design, materials,
surface quality, and cleanability. To ensure safe production, we provide solutions for applications with special requirements in
secondary hygienic processes.
Situation Consequence Solution See
page
Bacteria growth
Surface roughness < 0.8 µm Electropolished pump 13
Drainable base Standard feature -
Hygienic connections Avoid microbial growth
Standard connections cannot be used TriClamp connection 13
Special installation requirements
Main applications
• Ships
• Mobile applications
• Fire fighting
• Earthquake prone areas
• Remote areas
• Space-limiting areas
Certain types of installations require a different pump design than the
traditional vertical pump. We provide solutions for applications involving
horizontally mounted pumps, belt-driven pumps, ejector pumps, etc.
Situation Consequence Solution See
page
Marine insurance required Inspection certificates required Lloyds(LRS),Veritas (DNV), American
(ABS) etc. 13
Installation on ships or other
vehicles Pump stressed due to vibrations Horizontal installation 10
No electricity available Pump must be powered by
non-electrical source
Pump with belt drive (e.g. for
diesel engines) 11
Special color required (E.g. fire fighting pumps or pumps in
company colors) Customized solution offered 13
Limited space for installation Pump is too tall and may not fit into
installation area
MLE high-speed motor solution or
horizontal design and bracket mounting
6
10
Pump certification required Pump must be classified according to
international classification societies Various certificates available 13
Temperature control systems for:
• Casting and moulding tools
• Oil processing
• Chemical processes
6GRUNDFOS CR 7GRUNDFOS CR
NEMA premium efficiency motors are available on every CR
pump and cover virtually any application. The motors are
available in a variety of configurations to meet the demands
of the pumping environment and/or the pumped liquid itself.
What follows is an overview of some of the most common
motor variants offered by Grundfos. However, the overview
covers only a fragment of the total motor range. Please do
not hesitate to contact Grundfos if your requirements are not
covered by the overview.
Variety of efficiency levels
Special supply voltages
Extreme operating conditions
Special motor protection
Specific approval
Special motor design
MOTORS Solution Description Photo
cURus approval Grundfos motors are available with
the cURus approval covering USA and Canada
as standard.
Dual frequency: 60 Hz 3 x 208-230/460 V
50 Hz 3 x 400 V
Certificates The Grundfos laboratory is authorized to issue
various certificates for motors:
- noise
- vibration
- performance
- efficiency
Four-pole motor Four-pole motors for applications where
very low noise levels are required or for
applications where reduced turbulence
of the pumped liquid is desired.
Over or
undersized
motors
For use where the viscosity or density is
different from that of water, or installations
where the altitude exceeds 3280 feet or, where
the ambient temperature is very high.
Terminal box
position
The terminal box can be placed on any of the four
sides of the pump depending on installation area.
Enclosure class TEFC Enclosure class is standard on Grundfos
motors. Enclosure class ODP and other options are
available.
Solution Description Photo
Explosion proof
motors
A full range of special explosion-proof and
dust ignition-proof motors are available.
MLE motors The Grundfos MLE motor with integrated
frequency converter can operate at different
speeds to optimize pump performance
in the application.
Low speed, to obtain:
- gentle handling of the liquid
- pumping at low NPSH level
- reduced noise emission
Over-synchronous speed, to obtain:
- high dynamics
- compact physical size
The advanced control can measure and adapt
to special applications, including:
- Extended protection of process
- Extended protection of pump and drive
- Pump performance curve adjusted to match
individual applications
Standard MLE motors have built-in motor
protection, pump monitoring, and on-board
regulator and sensor supply for control of
primary process. If special control is required,
the MLE can be equipped with extended
I/O cards and a BUS connection. Customized
software and add-on hardware can be tailored
to match special demands.
The MLE motor can be controlled by a variety
of interfaces such as:
- buttons on the pump
- advanced R100 infra-red remote control
- standard analog signals
- BUS communication
Heating units Anti-condensation heating can be supplied by
a built-in heating unit.
Thermal
protection
Motors with a built-in bimetallic thermal
protector (PTO) or a temperature controlled
PTC thermistor are available.
Special voltage Motors suitable for any supply voltage, single
or three-phase, as well as dual voltage options.
8GRUNDFOS CR 9GRUNDFOS CR
Extreme liquids call for extreme measures. Most pumps are
used for watery liquids at temperatures below 248°F and
pressures lower than 435 psi. When liquids go beyond these
limits, special shaft seal solutions are required to guarantee
reliable operation.
What follows is an overview of some of the most common
shaft seal variants offered by Grundfos. However, the over-
view covers only a fragment of the total shaft seal range.
Please do not hesitate to contact Grundfos if your require-
ments are not covered by the overview.
Aggressive or corrosive liquids
Abrasive liquids
Poisonous and/or explosive liquids
High-viscosity and/or sticky liquids
Extraordinary high pressure
Extraordinary high or low temperature
SHAFT SEALS Solution Description Photo Solution Description Photo
Double shaft seal
back-to-back
For applications involving dangerous,
flammable, or very aggressive liquids, a double
shaft seal, back-to-back, fitted in a pressure
chamber is available. The pressure in the
chamber must be higher than the pump
pressure to prevent leakage.
The barrier fluid pressure can be supplied
by either a Grundfos dosing pump arrange-
ment (up to 232 psi) or an intensifier for
pressure requirements above 232 psi.
MAGdrive
(sealless)
MAGdrive pumps are completely leak-free. They
use the power of strong magnets to turn the
pump shaft from the outstide, so there are no
seals or openings for the liquid to escape through.
The result is safe, hermetically-sealed pumping.
Double shaft seal
tandem
For applications involving a high risk of
crystallization (e.g. sugar solutions ) or
hardening (e.g. oil or paint) as well as pumps
handling vacuum, a special double shaft seal
in a tandem arrangement is available.
Grundfos offers a quenching fluid system
for the flushing of the shaft seal.
Shaft seal
variants
Grundfos offers a wide range of balanced
cartridge shaft seals with different seal faces
such as silicon carbide, carbon and tungsten
carbide to handle almost any industrial liquid.
Titanium
shaft seal
For applications involving a high risk of
corrosion, an all-titanium shaft seal
variant is available for the all-titanium
CRT pumps.
Rubber materials Chemical-resistant Fluoraz® (FXM) or Kalrez®
(FFKM) rubber O-rings are available in
applications where the liquid may damage
standard o-rings. [Standard o-ring materials
are ethylene-propylene (EPDM), Viton® (FKM)].
LiqTec™
dry running
protection
The Grundfos LiqTec™ is an electronic
anti-dry-running sensor that stops the
pump immediately if it senses no liquid.
The LiqTec™ can also monitor the flow and
temperature of the pumped liquid and
can operate as a PTC relay for the motor
to monitor motor overload.
High
temperatures
Pumps that handle high temperatures
are fitted with a special air-cooled shaft seal
chamber enabling them to withstand water
temperatures of up to 356°F, (thermal oil of
up to 464°F). No external cooling is required.
10 GRUNDFOS CR 11GRUNDFOS CR
PUMP MODULES
All the made-to-stock CR pump modules can handle the
most demanding of liquids and pressures – and can be
adjusted for virtually any requirement. The modules can be
combined in multiple ways making it possible for us to provide
you with a pump solution that matches your specific needs.
CR pumps come in many flow sizes and various grades of
corrosion-resistant stainless steel – and an all-titanium variant.
What follows is an overview of some of the most common
pump variants offered by Grundfos. However, the overview
covers only a fragment of the total pump range. Please do
not hesitate to contact Grundfos if your requirements are not
covered by the overview.
High inlet pressure
High-pressure pump systems required (up to 725 psi)
Pumping of gas or particle-entrained liquids
Pumping of high-viscosity or sticky liquids
Low NPSH level
Horizontal pump mounting
No carbon or silicone allowed
Special materials required
Solution Description Photo Solution Description Photo
Low NPSH-pump For applications involving poor inlet conditions,
(e.g. boiler feed), special low NPSH versions are
available to reduce NPSH and eliminate
cavitation.
Silicon-reduced
solution
For processes that require no silicon,
(e.g. paint industry), 100% silicon-reduced
solutions are available.
All stainless
steel
For applications exposed to a corrosive
environment, (e.g. maritime applications), or
where frequent wash-down occurs, a stainless
steel base plate and motor stool are available.
All parts exposed to the corrosive environment is
made of stainless steel.
Rubber materials Chemical-resistant Fluoraz® (FXM) or Kalrez®
(FFKM) rubber O-rings are available in
applications where the liquid may damage
standard o-rings. [Standard o-ring materials
are ethylene-propylene (EPDM), Viton® (FKM)].
Horizontal
mounting
Certain situations require the pumps to be
mounted horizontally.
The CR pumps can be designed to fit
installations with limited height, on vehicles,
or ships, or in earthquake prone areas.
Pump bearings A wide variety of bearing materials are available
to suit any application, [(e.g. silicium carbide,
bronze, tungsten carbide, and carbon-filled
polytetrafluorueththylene (PTFE)].
Refrigerant
pump
For applications handling temperatures down
to -40°F, special coolant pumps are available.
Because of different thermal coefficient of
expansion, special design is required.
High pressure
pumps
For high-pressure applications, special single or double-
pump solutions are available. These pumps are
capable of generating up to nearly 725 psi pressure.
To avoid high pressure near the vulnerable shaft seal,
the hydraulic design of high-pressure pumps ensures
that the highest pressure is generated at the base of
the pump, farthest away from the shaft seal.
Carbon-free
solution
For processes that require carbon-free
installations (e.g. electronics industry).
Belt-drive For applications in remote areas or mobile
applications where electric power is not available,
belt-driven pumps powered by another means
such as a diesel engine or a steam turbine, can
be supplied.
12 GRUNDFOS CR 13GRUNDFOS CR
OTHER OPTIONS
In addition to the range of variants relating to the motor,
shaft seal, or pump module of the CR products presented
on the foregoing pages, Grundfos offers a variety of other
customized solutions to suit almost any conceivable need
or requirement that you may have. For instance, a variety of
connection options are available, as are pump models for ad-
ditional corrosion requirements, hygienic demands, or pumps
in special colors.
The following overview presents only a fraction of the many
possibilities that we offer. Please do not hesitate to contact
Grundfos if your requirements are not cov ered by the overview.
What you need. Guaranteed.
It is more than likely that we will be able to create exactly the
right pump for you by combining the elements and options
already available within the CR range. But if you have special
requirements or a specific design in mind, let us know. We will do
our best to provide full satisfaction.
Great tools are just a mouse-click away!
Grundfos offers the market’s most comprehensive, 24-hour, on-
line access to everything you need to maintain or service your
system, from CAD drawings to installation videos and operat-
ing instructions. Go to www.grundfos.us, choose “WinCAPS and
WebCAPS” under “Resources” and select “WebCAPS Grundfos
on-line catalog”. Find detailed technical information, drawings,
wiring diagrams, dimensioning – everything!
Solution Description Photo
Hygienic For applications in the pharmaceutical and biotechnology
industry, special hygienic solutions are available (e.g.
electropolished pumps with TriClamp connections).
Additional
corrosion resistance
For applications with a need for improved corrosion
resistance, electropolished stainless steel or all-titanium
pumps are available.
Cleaned and dried pump
components
For applications with very strict requirements and/or
cleanliness. All pump parts have been cleaned in hot
soapy water, rinsed in de-ionized water, and packed in
silicon-free plastic bags.
Special colors Pumps are available in a multitude of colors to match
any requirement.
Certificates A wide range of pump and material certificates are
available, (e.g. inspection certificates including Lloyds(LRS),
Veritas (DNV), American (ABS) etc.), as well as material
specification, duty-point verification, surface roughness,
vibration test, motor test, ATEX, and much more.
Multi packaging Pumps can be delivered on pallets without any additional
packaging (cardboard).
14 GRUNDFOS CR 15GRUNDFOS CR
PERFORMANCE CURVES AND TECHNICAL DATA
CR 1s CR 1 CR 3 CR 5 CR 10 CR 15 CR 20 CR 32 CR 45 CR 64 CR 90 CR 120 CR 150
Range:
Temperature range (°F)
On request (°F)
Nominal flow rate (US GPM) 4.5 8.5 15 30 55 95 110 140 220 340 440 610 750
CR: Flow range (US GPM) 0.5 - 5.7 1 - 12.8 1.5 - 23.8 3 - 45 5.5 - 70 9.5 - 125 11 - 155 14 - 210 22 - 310 34 - 450 44 - 630 61 - 700 75 - 790
Max. pump efficiency (%) 35 49 59 67 70 72 72 76 78 79 80 75 73
Max. working pressure (psi) 362 362 362 362 362 362 362 435 435 435 435 435 435
Max. working pressure (psi) - on request - 725 725 725 725 725 725 580 580 580 580 580 580
Version:
CR (AISI 304 / Cast Iron) ••••••••••• • •
CRI (AISI 304) •••••••------
CRN (AISI 316) ••••••••••• • •
CRT (Titanium) - - CRT 2 CRT 4 CRT 8 CRT 16 - - - - - - -
CR, CRE pipe connection:
Oval Flange (NPT) 1" 1" 1" 1 1/4" 2" 2" 2" - - - - - -
On request (NPT) 1 1/4" 1 1/4" 1 1/4" 1" 1 1/2" - - - - - - - -
ANSI Flange Size 1 1/4" 1 1/4" 1 1/4" 1 1/4" 2" 2" 2" 2 1/2" 3" 4" 4" 5" 5"
On request - - - - - - - 3" 4" 5" 5" 6" 6"
ANSI Flange Class 250 lb. 250 lb. 250 lb. 250 lb. 250 lb. 250 lb. 250 lb. 125/250 lb. 125/250 lb. 125/250 lb. 125/250 lb. 125/250 lb. 125/250 lb.
CRI, CRIE pipe connection:
Oval Flange (NPT) 1" 1" 1" 1 1/4" 2" 2" 2" - - - - - -
On request - (NPT) 1 1/4" 1 1/4" 1 1/4" 1" 1 1/2" - - - - - - - -
ANSI Flange Size 1 1/4" 1 1/4" 1 1/4" 1 1/4" 2" 2" 2" - - - - - -
ANSI Flange Class 300 lb. 300 lb. 300 lb. 300 lb. 300 lb. 300 lb. 300 lb. - - - - - -
On request - PJE coupling (Victaulic) 1 1/4" 1 1/4" 1 1/4" 1 1/4" 2" 2" 2" - - - - - -
On request - Clamp coupling (NPT) 1", 1 1/4" 1", 1 1/4" 1", 1 1/4" 1", 1 1/4" 1 1/2", 2" 1 1/2", 2" 2", 2 1/2" - - - - - -
On request - Union (NPT ext. thread) 2" 2" 2" 2" - - - - - - - - -
CRN, CRNE pipe connection:
PJE Coupling (Victaulic) 1 1/4" 1 1/4" 1 1/4" 1 1/4" 2" 2" 2" - - - - - -
On request - PJE - - - - - - - 3" 4" 4" 4" 4" 4"
ANSI Flange Size 1 1/4" 1 1/4" 1 1/4" 1 1/4" 2" 2" 2" 2 1/2" 3" 4" 4" 5" 5"
On request - ANSI - - - - - - - 3" 4" 5" 5" 6" 6"
ANSI Flange Class 300 lb. 300 lb. 300 lb. 300 lb. 300 lb. 300 lb. 300 lb. 150/300 lb. 150/300 lb. 150/300 lb. 150/300 lb. 150/300 lb. 150/300 lb.
On request - Clamp coupling (NPT) 1", 1 1/4" 1", 1 1/4" 1", 1 1/4" 1", 1 1/4" 1 1/2", 2" 1 1/2", 2" 2", 2 1/2" - - - - - -
On request - Union (NPT ext. thread) 2" 2" 2" 2" - - - - - - - - -
CRT pipe connection:
PJE coupling (Victaulic) - - 1 1/4" 1 1/4" 2" 2" - - - - - - -
On request - ANSI Flange Adapter - - - - 2" 2" - ------
• :Available
- :Not available
1) CRN 32 to CRN 90 with HQQE shaft seal: –40 °F to +250 °F
2) CR, CRN 120 and 150 with 75 or 100 Hp motors with HBQE shaft seal: 0 °F to +250 °F
-40 to +356
-4 to +250
-40 to +356
-22 to +250 1) & 2)
1 2 4 6 8 1010 20 40 60 80 100100 200 400 600 800
Q [US GPM]
20
30
40
60
80
100
200
300
400
600
800
1000
[ft]
H
1010
20
30
40
50
60
80
100100
200
300
[m]
H
11 2 3 4 5 6 7 8 1010 20 30 40 50 60 80 100100 Q [m³/h]
60 Hz
CR 150
CR 120
CR 20
CR 15
CR 10CR 1s
CR 5
CR 3
CR 1
CRI 1
CRN 1
CRI 3
CRN 3
CRI 5
CRN 5
CRN 32 CRN 64
CRN 90CRN 45
CR 32
CR 45
CR 64
CR 90
CRI 1s
CRN 1s
CRI 10
CRN 10
CRI 15
CRN 15
CRI 20
CRN 20
CRN 120
CRN 150
1 2 4 6 8 1010 20 40 60 80 100100 200 400 600 800
Q [US GPM]
0
20
40
60
80
[%]
Eff
16 GRUNDFOS CR
www.grundfos.com/CR
The CR range from Grundfos
Grundfos was the first company ever to develop a multi-stage
in-line pump. The present-day CR pump series is the most
extensive in-line pump program on the market and remains
second to none. With many innovative features unique to
Grundfos, CR pumps provide superior reliability and the
lowest possible cost of ownership to customers worldwide.
Customization made easy
In order to meet all customer requirements with complete
precision, Grundfos has developed a unique mix-and-match
approach to customization. The elements of the CR range
can be combined any which way to create the solution that
is exactly right for you.
Grundfos: a pump for every purpose
Impressive as the CR range is, Grundfos offers much more.
A complete range of pump solutions means that all appli-
cations – industrial and domestic – can benefit from the
Grundfos touch.
Customers can always rely on our complete dedication to
quality and service.
Being responsible is our foundation
Thinking ahead makes it possible
Innovation is the essence
U.S.A.
GRUNDFOS Pumps Corporation
 West th Terrace
Olathe, Kansas 
Phone: () -
Telefax: () -
Canada
GRUNDFOS Canada Inc.
 Brighton Road
Oakville, Ontario
LH C
Phone: () -
Telefax: () -
Mexico
Bombas GRUNDFOS de Mexico S.A. de C.V.
Boulevard TLC No. 
Parque Industrial Stiva Aeropuerto
C.P.  Apodaca, N.L. Mexico
Phone: --- 
Telefax: --- 
L-CR-SL-008 Rev. 02/10
PRINTED IN USA

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