Limitations To Operation, Bm Hp Circulation Pump; Cooling - Grundfos BMPX Serie Instrucciones De Instalación Y Funcionamiento

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:
Recommended flow rates at 25 °C (77 °F)
3
m
Type of BM hp
50 Hz
BM 5A 3.2 - 5.6
BM 8A 5 - 9.5
BM 17 8 - 24
BM 30 15 - 38

17.1 Cooling

The temperature and flow limits stated in the table below must be
observed to ensure sufficient cooling of the motor:
Maximum permissible liquid temperature
Maximum
liquid
Motor
temperature
°C °F
Grundfos
40 104
MS 6"
/h US GPM
60 Hz 50 Hz 60 Hz
3.3 - 6.4 14 - 25 14 - 28
7 - 9 22 - 48 30 - 40
8 - 29 35 - 106 35 - 128
18 - 45 66 - 167 79 - 198
Minimum
flow velocity
Minimum flow
past the
motor
3
m/s (ft/s) m /h (US GPM)
≥ 0.15 (0.49) ≥ 5.5 (24)
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