Description: npsh datum plane minus reference plane; Name: npsh datum plane height
Description: Difference between the NPSH datum plane and the reference plane ; Name: Height of the NPSH datum plane
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