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Hydraulic efficiency

Hydraulic efficiency (ηh) is also referred to as "vane efficiency" in the specialist centrifugal pump engineering literature and is the quotient of pump power output (PQ) and vane power (Pvane).

P                     Power input of a centrifugal pump
PLm/Ldiscfric           Mechanical power loss in plain bearings and rolling element bearings, shaft                           seals and in the impeller side gaps (see Disc friction)

  

  

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