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Pump power for 50 m³/h at 40 m head

From flow, head and pump efficiency the calculator gives shaft power, motor power with margin and daily consumption.

Parameters

Result

Approximate calculation using a simplified model: for designing equipment and process modes, consult a technologist.

Calculation example

Feed
50 m³/h
Head is given in
metres of liquid column
Head
40
Medium
Water
Pump efficiency
70 %
Motor reserve
15 %
Operation per shift
8 h
Motor from the standard series
11,00 kW
Shaft power
7,78 kW
Hydraulic power
5,45 kW
Required motor with reserve
8,95 kW
Head
40,0 m
Pressure
3,92 bar
Energy per shift
62,3 kWh

Frequently asked questions

What motor power margin to allow?
Typically 10–25 %: more for thick products and start-up duty, less for water at steady load.

The calculations are approximate: they help to assess the process and compare options, but do not replace a process design and trials on a specific raw material. This section is for reference only and contains no commercial offers.