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1 . Pump efficiency itself is the most fundamental influence . Pump efficiency under the same operating conditions may differ by more than 15% .
2 . Pump operating conditions is lower than the rated operating conditions of the pump , the pump efficiency is low , high energy consumption .
3 . Motor efficiency in the use of essentially unchanged. So choose a high-efficiency motors of crucial importance .
4 . Pump efficiency is affected primarily related to the design and manufacturing quality . After the pump is selected , the smaller the impact on

subsequent management .
5. Hydraulic losses including loss of hydraulic friction and local resistance . Pump run after a certain time , inevitably led to the part surface of

the impeller and guide vanes and other wear and tear, water loss increases , reducing the hydraulic efficiency .
6. Pump the volume loss , also known as leakage losses , including impeller seal ring, class , three axial force balance mechanism leakage losses .

Volumetric efficiency is not only the level of design and manufacture , but also with the late management. A continuous running time of the pump , due

to friction between the components , the gap increases , the volumetric efficiency is reduced.
7 . Since the filter cylinder block , intake pipes and other causes centrifugal evacuation and idling.
8. Before the water pump started, employees do not pay attention to the preparatory work before the centrifugal pump starts , warm pump , disc pumps,

infusion pumps and other basic operating procedures do not completely , often causing pump cavitation , causing the pump noise, vibration, pump

efficiency low .