11
17. Limitations to operation, BM hp circulation
pump
The flow limits stated in the table below apply to the optimum
operating ranges of the pumps as regards efficiency and cooling:
17.1 Cooling
The temperature and flow limits stated in the table below must be
observed to ensure sufficient cooling of the motor:
Recommended flow rates at 25 °C (77 °F)
Type of BM hp
m
3
/h US
GPM
50 Hz
60 Hz
50 Hz
60 Hz
BM 5A
3.2 - 5.6
3.3 - 6.4
14 - 25
14 - 28
BM 8A
5 - 9.5
7 - 9
22 - 48
30 - 40
BM 17
8 - 24
8 - 29
35 - 106
35 - 128
BM 30
15 - 38
18 - 45
66 - 167
79 - 198
Maximum permissible liquid temperature
Motor
Maximum
liquid
temperature
Minimum
flow velocity
past the
motor
Minimum flow
°C
°F
m/s (ft/s)
m
3
/h (US GPM)
Grundfos
MS 6"
40
104
≥
0.15 (0.49)
≥
5.5 (24)
