CR, CRI, CRN, CRE, CRIE, CRNE
83
Variants
Lists of variants - on request
Although the Grundfos CR(E), CRI(E), CRN(E) product
range offers a number of pumps for different
applications, customers require specific pump solutions
to satisfy their needs.
Below please find the range of options available for
customizing the CR(E) pumps to meet the customers’
demands. Contact Grundfos for further information or
for requests other than the ones mentioned below.
Motors
Connections and other variants
Shaft seals
Pumps
Variant
Description
Explosion proof
motors
For operation in hazardous atmospheres,
explosion-proof or dust-ignition-proof
motors may be required.
Motors with
anti-condensation
heating unit
For operation in humid environments
motors with built-in anti-condensation
heating may be required.
Premium efficient
motors
Grundfos offers motors from 1 to 100 Hp
with a Premium efficiency class.
Different motor
brand
If technically possible, Grundfos can fit the
pump with a motor of a brand other than the
standard. This will normally increase the
time of delivery. Alternatively, the pump can
be supplied without a motor (motor thrust
rating must be checked).
Oversized motor
Ambient temperatures above 104 °F or
installation at altitudes of more than 3280 ft
above sea level require the use of an
oversized motor (i.e. derating).
4-pole motors
Grundfos offers standard motors fitted with
4-poles.
Variant
Description
Pipe connections
In addition to the wide range of standard
flange connections, a 232 Psi DIN standard
clamping flange is available.
Customized flanges are available
according to specifications.
TriClamp
connections
TriClamp connections are of a hygienic
design with a sanitary coupling for use in
the pharmaceutical and food industry.
Electropolished
pumps
To substantially reduce the risk of corrosion
of the materials.
For use in the pharmacentical/food
industry.
Variant
Description
Shaft seal with
FFKM O-ring
material
Shaft seals with FFKM or FXM o-ring
material are recommended for applications where
the pumped liquid may damage the standard O-ring
material.
Seal with flush,
quench seal
Recommended for applications involving
crystallizing, hardening or sticky liquids.
Cool-Top
®
shaft seal
system
Recommended for applications involving
extremely high temperatures.
No conventional mechanical shaft seal can
withstand liquid temperatures of up to 356 °F for
any length of time.
For that type of application, Grundfos’ unique air-
cooled shaft seal system is recommended.
In order to ensure a low liquid temperature around
the standard shaft seal, the pump is fitted with a
special air-cooled shaft seal chamber.
No separate cooling is required.
Double shaft
seal with
pressure
chamber
Recommended for applications involving
poisonous or explosive liquids.
Protects the surrounding environment and the
people working in the vicinity of the pump.
Consists of two seals mounted in a "back-to-back"
arrangement inside a separate pressure seal
chamber. As the pressure in the chamber is higher
than the pump pressure, leakage is prevented. A
dosing pump or a special pressure-intensifier
generates the seal chamber pressure.
CRN MAGdrive
Magnetically driven pumps for industrial
applications.
Key applications are industrial processes
involving the handling of aggressive,
environmental, dangerous or volatile liquids, e.g.
organic compounds, solvents, etc.
Variant
Description
Horizontally
mounted pump
For safety or height reasons, certain
applications, for instance on ships, require the
pump to be mounted in the horizontal position.
For easy installation the pump is equipped
with brackets that support motor and pump.
Low-temperature
pump to –4 °F
Exposed to temperatures down to –40 °F,
coolant pumps may require neck-rings
with a different diameter in order to prevent
impeller drag.
High-speed pump
up to 681 psi
For high-pressure applications, a unique pump
capable of generating up to 681 psi pressure
is available.
The pump is equipped with a high-speed
motor, type MLE. The direction of rotation is
the opposite of that of standard pumps, and
the chamber stack is turned upside-down, as a
result of which the pumped liquid flows in the
opposite direction.
High-pressure
pump up to 696 psi
For high-pressure applications, a unique
double pump system capable of generating up
to 696 psi pressure is available.
Low-NPSH pump
(improved suction)
Recommended for boiler-feed applications
where cavitation may occur due to poor inlet
conditions.
Belt-driven pumps
Belt-driven pumps designed to operate in
places with limited space or where no
electrical power is available.
Pumps for
pharmaceutical and
biotechnological
applications
CRN(E) pumps designed for applications
requiring the sterilization and CIP capability of
pipes, valves and pumps. (CIP = Cleaning-In-
Place).
