Cavitation of long source centrifugal pump

The cavitation phenomenon of the centrifugal pump means that the liquid to be delivered is partially vaporized due to the pressure of the saturated vapor at the delivery temperature being equal to or lower than the pressure at the inlet of the pump (actually at the inlet of the blade), causing noise and vibration of the pump. The flow rate, head pressure and efficiency of the pump are significantly reduced. Obviously, cavitation is not allowed in the normal operation of the centrifugal pump.

The key to avoiding cavitation is that the pump should be installed at the correct height, especially when transporting volatile liquids with high temperatures.

Substituting the Hs1 value into the formula to obtain the installation height

Hg=Hs1-Hf0-1=0.78-1.5=-0.72m

Hg is negative, indicating that the pump should be installed below the pool level, at least 0.72m below the liquid level.

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