Fluid Mechanics · worked example
Hydraulic, shaft, and motor power for a centrifugal pump moving 50 m³/h of water against 40 m of head, at 70 % pump and 95 % motor efficiency.
| Flow rate | 50 m³/h |
| Differential head | 40 m |
| Specific gravity | 1 |
| Pump efficiency | 70 % |
| Motor efficiency | 95 % |
| Pump shaft (brake) power | 7.783 kW |
| Pump shaft power | 10.437 hp |
| Hydraulic power | 5.448 kW |
| Recommended min motor | 9.73 kW |
| Motor electrical input | 8.193 kW |
These values are computed by the Pump Sizing (API 610) calculator. Open the tool to change any input.
Open the full Pump Sizing (API 610) calculator →