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Message: <blockquote data-quote="imhotep" data-source="post: 24652404" data-attributes="member: 562115">Cavitation can cause serious damage to the impeller. It is caused by the bubble formation which causes shockwaves inside the pump.The formation of bubbles in cavitation is not a major problem in itself but the collapse of these bubbles generates pressure waves, which can be of very high frequencies, causing damage. The bubbles collapsing near the machine surface are more damaging and cause erosion on the surfaces called as cavitation erosion. The collapses of smaller bubbles create higher frequency waves than larger bubbles. So, smaller bubbles are more detrimental to the hydraulic machines.In a pump is usually due to insufficient Net Positive Suction Head.This happens in turbines too.</blockquote>

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