Description: Power requirement of the pump at the flow rate at the point of best efficiency; Name: pump power input (optimum)
Description: pump power input at the rate of flow corresponding to the best efficiency; Name: optimum pump power input
Description: average speed given by the stroke length multiplied with the number of complete pumping cycles of the piston, plunger or piston attached to the diaphragm per minute (stroke per minute or pump crank speed); Name: piston velocity