USEFUL FORMULAS

Some useful formulas for pump users

BHP( KW) : 0.163 x m3/min x head ( m ) x sg / efficiency ( % )
This is will indicate the BHP in Kw


Velocity ( m/sec )= Q ( M3 /HR ) X 353.60 / D2 ( pipe diameter in mm )

Recommcneded velocity
Suction Line : 0.5 to 1.2 m/sec
Discharge Line : 1 to 3 m/sec

Option : the lower the better , however it is piping cost versus power consumption
over a long term period .Greater saving on power if motor is bigger

see earlier posting on this issue