Description: free cross-section of the inlet opening in the inlet nozzle of the pump; Name: Inlet cross section of the pump
Description: free cross-sectional area of the entry opening in the inlet connection of the pump; Name: inlet area of the pump
Description: amount of the absolute value of the total head above the head, equivalent to the vapour pressure of the liquid at the particular temperature, with reference to the NPSH datum plane; Name: net positive suction head