Best Efficiency Point - BEP

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A pump does not completely convert the kinetic to pressure energy. Some of the energy is always lost internal and external in the pump. 

Internal losses

• hydraulic losses - disk friction in the impeller, loss due to rapid change in direction an velocities through the pump
• volumetric losses - internal recirculation at wear rings and bushes

External losses

• mechanical losses - friction in seals and bearings

The efficiency of the pump at the designed point is normally maximum and is called the

• Best Efficiency Point - BEP

It is possible to operate the pump at other points than BEP, but the efficiency of the pump will always be lower than BEP.

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Related Topics

• Pumps - Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more

Related Documents

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• Discharge Regulation of Centrifugal Pumps - Adapting pump capacities to process demand
• Pumps - Specific Suction Speed - Specific Suction Speed may be used to determine what general pump design to use for maximum efficiency
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• System Curve and Pump Performance Curve - To select a proper pump for a particular application it is necessary to utilize the system curve and the pump performance curve
• Volume Flow and Temperature Rise in Pumps - Calculate temperature rise in pumps