NPSH calculations
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This submission shows the method to calculate the NPSH (net positive suction head) of the pump connected to the tank.
See the attached diagram for system sketch.
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Solution Summary
NPSH is defined as either, NPSHR (NPSH Required) or NPSHA (NPSH Available)
NPSHR: The minimum pressure required at the suction of the pump in order to avoid the problem of cavitation. It is provided by the pump vendor and is a function of the system
NPSHA: The absolute actual pressure present at the suction port of the pump. This value is calculated and must be greater than NPSHR in order to prevent the cavitation.
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NPSH is defined as either, NPSHR (NPSH Required)or NPSHA (NPSH Available)
NPSHR: The minimum pressure required at the suction of the pump in order to avoid the problem of cavitation. It is provided by the pump vendor and is a function of the system
NPSHA: The absolute actual pressure present at the suction port of the pump. This value is calculated and must be greater than NPSHR in order to prevent the cavitation.
Vapour Pressure and Cavitation:
Vapour pressure is the minimum required to boil the liquid at a given temperature. Cavitation happens when the pressure at the ...
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