Total head available to the system.
Closed bypass
V4
V3
A4
V2
A3
A2
Open bypass
A4
V4
V3
A2
Key:
V2 = Total head available to the system with pump at speed 2
V3 = Total head available to the system with pump at speed 3
V4 = Total head available to the system with pump at speed 4
A2 = Power absorbed by the pump at speed 2
A3 = Power absorbed by the pump at speed 3
A4 = Power absorbed by the pump at speed 4
Flow rate (l/h)
A3
V2
Flow rate (l/h)
31
33
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