What does "NPSH" stand for in pump systems?

"NPSH" stands for Net Positive Suction Head, which is a critical parameter in pump systems. It is a measure of the pressure available at the pump inlet to avoid cavitation, ensuring that the liquid can enter the pump without forming vapor bubbles. The main point of distinguishing NPSH is that it quantifies the actual pressure conditions at the pump's suction side, taking into account variables such as the height of the liquid in the supply tank and the vapor pressure of the liquid.

Understanding NPSH is essential for proper pump selection and operation because inadequate NPSH can lead to cavitation, which can cause damage to the pump impeller and reduced efficiency. Therefore, net positive suction head is an important consideration when designing and evaluating pump systems to ensure reliable and efficient operation.