Fluid Mechanics · worked example

Pump power for 50 m³/h at 60 m head (water)

Hydraulic, shaft, and motor power for a centrifugal pump moving 50 m³/h of water against 60 m of head, at 70 % pump and 95 % motor efficiency.

Inputs

Flow rate	50 m³/h
Differential head	60 m
Specific gravity	1
Pump efficiency	70 %
Motor efficiency	95 %

Result

Pump shaft (brake) power	11.675 kW
Pump shaft power	15.656 hp
Hydraulic power	8.172 kW
Recommended min motor	14.59 kW
Motor electrical input	12.289 kW

These values are computed by the Pump Sizing (API 610) calculator. Open the tool to change any input.

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