Total head available to the system.
Closed bypass
V3
V2
A3
V1
A2
A1
Open bypass
A3
V3
V2
A1
Key:
V1 = Total head available to the system with pump at speed 1
V2 = Total head available to the system with pump at speed 2
V3 = Total head available to the system with pump at speed 3
A1 = Power absorbed by the pump at speed 1
A2 = Power absorbed by the pump at speed 2
A3 = Power absorbed by the pump at speed 3
Flow rate (l/h)
A2
V1
Flow rate (l/h)
34
35
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