Best flow rate

The best flow rate is the flow at the point of best efficiency, i.e. the point at which the pump's efficiency curve has its maximum.

This point is called the best efficiency point (BEP) of the pump. The position of the point changes if the hydraulic parameters of the pump, such as the impeller diameter or the speed resp. the viscosity of the pumped liquid, change.

The aim of an optimal pump selection is for the pump to operate at the BEP so that it achieves its maximum efficiency.

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