Vapour Pressure
Vapour pressure is the absolute pressure (also saturated steam pressure) which the vapour of a substance assumes in equilibrium with its liquid or solid phase, whereby in centrifugal pump technology only the transition between gaseous and liquid phase is of significance.
The vapour pressure of the pumped fluid greatly influences Cavitation Behaviour and thus the System NPSHavailable.
The vapour pressure is one of the important liquid properties for pump selection and depends on the fluid temperature.
