Dutypoint VT Booster Set, Руководство по эксплуатации и обслуживанию

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English (GB)
G
4
3. Type designation
3.1 Type key for CR, CRI, CRN 1s, 1, 3, 5, 10, 15 and 20
3.2 Type key for CR, CRN 32, 45, 64, 90, 120 and 150
4. Applications
Grundfos multistage in-line centrifugal pumps, types CR, CRI and
CRN, are designed for a wide range of applications.
CR, CRI, CRN
CR, CRI CRN pumps are suitable for liquid transfer, circulation
and pressure boosting of cold or hot clean liquids.
CRN
Use CRN pumps in systems where all parts in contact with the
liquid are made of high-grade stainless steel.
Pumped liquids
Thin, clean, non-flammable liquids, not containing solid particles
or fibres. The liquid must not attack the pump materials
chemically.
When pumping liquids with a density and/or viscosity higher than
that of water, use motors with correspondingly higher outputs, if
required.
5. Technical data
5.1 Ambient temperature and altitude
If the ambient temperature exceeds the above temperature
values or the pump is installed at an altitude exceeding the above
altitude values, the motor must not be fully loaded due to the risk
of overheating. Overheating may result from excessive ambient
temperatures or the low density and consequently low cooling
effect of the air.
In such cases, it may be necessary to use a motor with a higher
rated output.
Fig. 2
Motor output depends on temperature/altitude
Example
Figure 2 shows that the load of an IE3 motor at an ambient
temperature of 70 °C must not be loaded more than 89 % of the
rated output. If the pump is installed 4750 metres above sea
level, the motor must not be loaded more than 89 % of the rated
output.
In cases where both the maximum temperature and the maximum
altitude are exceeded, the derating factors must be multiplied
(0.89 x 0.89 = 0.79).
Example CR 3- 10 X- X- X- X- XXXX
Type range: CR, CRI, CRN
Nominal flow rate in m
3
/h
Number of impellers
Code for pump version
Code for pipework connection
Code for materials
Code for rubber pump parts
Code for shaft seal
Example CR 32- 2 1- X- X- X- X- XXXX
Pump range: CR, CRN
Nominal flow rate in m
3
/h
Number of stages
Number of impellers with reduced diameter
Code for pump version
Code for pipework connection
Code for materials
Code for rubber pump parts
Code for shaft seal
Motor
power
[kW]
Motor
make
Motor
efficiency
class
Maximum
ambient
temperature
[°C]
Maximum
altitude
above sea
level
[m]
0.37 - 0.55
Grundfos
MG
- +40 1000
0.75 - 22
Grundfos
MG
IE3 +60 3500
30 - 75 Siemens IE3 +55 2750
TM
03
24
79
44
05
Pos.
Motor power
[kW]
Motor make
1
0.37 - 0.55 MG
0.37 - 22 MGE
2 0.75 - 22 MG
3 30 - 75 Siemens
Note
For motor bearing maintenance at ambient
temperatures above 40 °C, see section
9. Maintenance .
20 25 30 35 40 45 50 55 60 65 70 75 80
50
60
70
80
90
100
[%]
P2
2
1
t [°C]
1000 2250 3500 4750 m
3