What is the meaning of N.P.S.H?

N.P.S.H. stands for Net Positive Suction Head, which is a critical parameter in pump operation. It measures the pressure available at the pump's suction port, expressed in terms of height of liquid, and determines whether the pump can operate without cavitation. A sufficient N.P.S.H. ensures that the liquid entering the pump stays in its liquid state, preventing damage and inefficiency. It is influenced by factors such as the fluid's vapor pressure, the height of the fluid source, and the system's design.