Reasons for frequent cavitation in the boiler feed water pump
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Why are multi-stage boiler feed pumps operating at 102~120 degrees so prone to cavitation? The inlet pressure gauge indicates that cavitation should not occur. Is it true that even though the pressure is higher than the vaporization value, a small amount of gas still remains? I also thought about having the inlet pass through the deaerator, to see if there’s a chance to increase the gas content.
It is also important to know the vertical distance between the deaerator and the feed water pump.
By closing the outlet valve and slightly opening the return valve, cavitation will be reduced!