CR, CRI, CRN, CRE, CRIE, CRNE
4
Product overview
Introduction
This data booklet deals with CR, CRI and CRN as well
as CRE, CRIE and CRNE pumps.
CR, CRI, CRN
Fig. 1 CR, CRI and CRN pumps
CR, CRI, CRN pumps are vertical multistage centrifugal
pumps. The in-line design enables the pump to be
installed in a horizontal one-pipe system where the
suction and discharge ports are in the same horizontal
plane and have the same pipe dimensions. This design
provides a more compact pump design and pipework.
Grundfos CR pumps come with various pump sizes and
various numbers of stages to provide the flow and the
pressure required.
CR pumps are suitable for a variety of applications from
pumping of potable water to pumping of chemicals. The
pumps are therefore used in a wide variety of pumping
systems where the performance and material of the
pump meet specific demands.
The CR pumps consist of two main components: the
motor and the pump unit. The motor on a CR pump is a
heavy-duty Grundfos specified motor.
The pump unit consists of optimized hydraulics, various
types of connections, an outer sleeve, a top and various
other parts.
CR pumps are available in various material versions
according to the pumped liquid.
CRE, CRIE, CRNE
Fig. 2 CRE, CRIE and CRNE pumps
CRE, CRIE, CRNE pumps are built on the basis of CR,
CRI, CRN pumps.
CRE, CRIE, CRNE pumps belong to the so-called E-
pump family and are referred to as E-pumps.
The difference between the CR and the CRE pump
range is the motor. CRE, CRIE, CRNE pumps are fitted
with an E-motor, i.e. a motor with built-in frequency
control.
The motor of the CRE pump is a Grundfos MLE motor.
Frequency control enables continuously variable
control of motor speed, which makes it possible to set
the pump to operation at any duty point. The aim of
continuously variable control of the motor speed is to
adjust the performance to a given requirement.
CRE, CRIE and CRNE pumps are available with an
integrated pressure sensor connected to the frequency
control.
The pump materials are the same as those of the CR,
CRI, CRN pump range.
Selecting a CRE pump
Select a CRE pump if:
• controlled operation is required, i.e. consumption
fluctuates;
• constant pressure is required,
• communication with the pump is required.
Adaptation of performance through frequency-
controlled speed control offers obvious advantages:
• Energy savings.
• Increased comfort.
• Control and monitoring of the pump performance.
TM02 7698 3803
TM02 7397 3403
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