Pump net positive suction head
Thread Content
Is there a conversion formula for the relationship between the net positive suction head required by a pump and its effective net positive suction head?
Pump critical NPSH: At the critical condition when cavitation just begins to occur in the pump, it is the amount by which the mechanical energy of the liquid at the pump inlet exceeds the potential energy corresponding to the vaporization of the liquid. It can generally be determined using Bernoulli’s equation ； Required NPSH of the pump: According to relevant standards, the measured critical NPSH is increased by a safety margin to determine the required NPSH. Actual NPSH of the pump: Generally, it is more than 0.5 meters higher than the required NPSH for the pump. I’ve never heard of what you call the effective NPSH; I have no idea!