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Installation, Operation and Maintenance Manual Installation, Operation and Maintenance Manual
3. TECHNICAL
Maximum suction pressure
The following formula is valid for Figure 5.
P
1max + Pmax ≤ PN
P1max Maximum suction pressure
Pmax Maximum pump generated pressure
PN Maximum operating pressure
Figure 5:
Pump pressure schematics.
3.4. Minimum flow
Due to risk of overheating, the pump must not be used below the minimum recommende flow
rate.
Figure 6 shows the minimum flow rate as a percentage of the nominal flow rate depending on
the liquid temperature.
Figure 6:
Recommended motor load
according to temperature
and altitude
Qmin
[%]
30
20
10
0
104 140 176 212 248 284 320 356 392
T[℉]
ATTENTION:
The pump must never operate while the downstream valve is closed.
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