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Puming System Design

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  CAPACITY 1 HEAD REQUIRED 2 SUCTION LIFT 3 HORSE POWER 4 Pumping SystemDesign  3 SUCTION LIFT ã Barometric Pressure (which depends on Temp. and Elev.) ã Vapor Pressure (which also depends on Temp.) ã Friction and Entrance losses on the suction side ã Net Positive Suction Head (NPSH)  – a factor that depends on the shape of the impeller and is obtained from the pump manufacturer  3 HORSE POWER  The required horse power to drive the pump is called Break Horsepower (BHP) BHP = (w.Q.H) / (75. η p . η m ) ã Q = discharge (m 3 /s) ã H = head of water (m) ã w = density of water (kg/m 3 ) ã  η p = efficiency of the pump ã  η m = efficiency of the motor

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Sep 22, 2019
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