Suction Head means the source liquid elevation
is above the centerline of the pump. Pumping
effort (dynamic head) delivers liquid to a
different elevation. Engineering considerations
to keep in mind when working with motor driven
pumps: Pumps are usually sized to operate in
the middle of the H-Q or performance
curve. Motors are sized to drive the pump when
it operates between the required minimum and
maximum flow and pressure points on the H-Q or
performance curve. Variable Frequency Drives
(VFD) are sized to meet the full load amps
(FLA) of the motor.