The theoretical power (in h.p.) required to drive a reciprocating pump is
Where w = specific weight of liquid to be pumped
Q = discharge of the pump in m3/s
Hs = suction head in m
Hd = delivery head in m
1
\(\frac{{wQ\space ({H_s}\space +\space {H_d})}}{{75}}\)
2
\(\frac{{wQ{H_s}}}{{75}}\)
3
\(\frac{{wQ{H_d}}}{{75}}\)
4
\(\frac{{wQ{H_s}}}{{60}}\)