In pump performance curve, The point of highest pump efficiency is called the Best Efficiency Point.This point is the pump design point and operating point, where we can get maximum efficiency of the pump. At this point the flow has the minimum friction and disturbance as it passes through the pump.
For lower power consumption or for better efficiency or for energy conservation, it is advisable to pump is operated between 80 and 100% of BEP. Flow rate below BEP, causes poor hydraulic performance and increased hydraulic impeller load. Above the BEP, causes vibration and cavitation in the pump.
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