Specific Speed

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For geometrically similar pumps, the quantity NQ1/2 / (gh)3/4 is a constant. It is called as the specific speed (Ns)of the pump.

Specific speed may be defined as the speed of the pump which will produce unit flow Q against unit head h under conditions of maximum efficiency. Specific speed is a dimensionless quantity.

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Last Modified on: 14-Sep-2014

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