What is NPSH?
A. More often the term NPSH is misinterpreted as suction lift or suction head. This is no correct. The definition of NPSH is the absolute energy (Head) required to push the liquid into the impeller eye. If this is not provided, then the pressure at the eye of the impeller drops below the vapour pressure of the liquid and cavitation takes place. This ultimately deteriorates the performance of the Pump. The available NPSH can be worked out by the use of following formulae. See that the available NPSH is more than the NPSH required.
