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CONTENTS
1.
2.
2.1
Pump key for CR, CRN 2, 4, 8 and 16
3.
4.
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.
6.
7.
7.1
8.
9.
10.
11.
12.
13.
Before beginning installation procedures, these in-
stallation and operating instructions should be stud-
ied carefully. The installation and operation should
also be in accordance with local regulations and ac-
cepted codes of good practice.
1. Handling
The motors of the CR, CRN 2, 4, 8 and 16 pumps are
supplied with lifting eyes which must not be used for
lifting the entire pump.
When the entire pump is to be lifted, observe the following:
•
CR, CRN 2, 4, 8 and 16 pumps fitted with GRUNDFOS MG
motors should be lifted in the pump head by means of straps
or the like.
•
For other motor makes, it is recommended to lift the pump in
the pump head by means of straps.
2. Type designation
2.1 Pump key for CR, CRN 2, 4, 8 and 16
Example
Pump range:
3
Nominal flow rate in m
/h
Number of stages x 10
Number of impellers (is only used if the pump
has fewer impellers than chambers)
Code for pump version
Code for pipework connection
Code for materials
Code for shaft seal and rubber pump parts
4
Page
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
6
6
6
7
7
7
8
8
8
CR 8 - 30 / 2 - X - X - X - XXXX
3. Applications
GRUNDFOS multistage in-line centrifugal pumps, types CR and
CRN, are designed for a wide range of applications.
Pumped liquids
Thin, non-explosive liquids, not containing solid particles or fi-
bres. The liquid must not attack the pump materials chemically.
When pumping liquids with a density and/or viscosity higher than
that of water, motors with correspondingly higher outputs must be
used, if required.
CR, CRN
For liquid transfer, circulation and pressure boosting of cold or
hot clean water.
In systems where all parts in contact with the liquid must be made
of stainless steel, CRN pumps must be used.
4. Technical data
4.1 Ambient temperature
Maximum +40°C.
If the ambient temperature exceeds +40°C, the motor output (P2)
must be reduced, see fig. 1.
Fig. 1
P2
[%]
100
90
80
70
60
50
20 25 30 35 40 45 50 55 60 65 70 75 80
4.2 Liquid temperature
Pump type
See also fig. A, page 63, which indicates the relationship between
liquid temperature and maximum permissible operating pressure.
Note: The maximum permissible operating pressure and liquid
temperature ranges apply to the pump only.
4.3 Maximum permissible operating pressure and
liquid temperature for the shaft seal
Fig. 2
CR, CRN 2, 4, 8 and 16:
p [bar]
30
25
20
15
10
BUBE / BUBV
5
0
-40 -20
0
20
40
60
t [°C]
Liquid temperature
-20°C to +120°C
BUBE
80 100 120 140 160
t [°C]
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