Grundfos CRK Series - Electrical Data; Maximum Number of Starts; Minimum Flow Rate; 7 Sound Pressure Level

English (GB)
10
6.3 Minimum flow rate
Due to the risk of overheating, the pump must not be
used at flows below the minimum flow rate.
The curve below shows the minimum flow rate as a
percentage of the nominal flow rate in relation to the
liquid temperature.
Fig. 5 Minimum flow rate in relation to
temperature
6.4 Electrical data
See motor nameplate.
6.5 Maximum number of starts
7. Sound pressure level
The table below shows airborne noise emitted by
CRK and MTR pumps with motors fitted by
Grundfos.
TM04 5693 3809
Motor size
[kW]
Recommended maximum
number of starts per hour
0.06 - 0.18 100
0.25 - 2.2 250
3-4 100
5.5 - 11 50
15-22 40
30-45 8
40 50 60 70 80 90 100 110 120
t [°C]
0
10
20
30
Qmin
[%]
Motor
[kW]
50 Hz 60 Hz
0.37 50 55
0.55 50 53
0.75 50 54
1.1 52 57
1.5 54 59
2.2 54 59
3.0 55 60
4.0 62 66
5.5 60 65
7.5 60 65
11 60 65
15 60 65
18.5 60 65
22 66 70
30 71 75
37 71 75
45 71 75
L
pA
[dB(A)]