Understanding Pump Cavitation

Understanding Pump Cavitation
Figure 1: The pump manufacturer determines NPSHR and it is generally measured by reducing the suction pressure until the pump head has decreased 3 percent compared to the condition without any cavitation. (Courtesy of Hydraulic Institute)

The word cavitation comes from the Latin word “cavus” meaning hole or cavity. Cavitation refers to conditions within the pump, when the local pressure drops below the vapor pressure of the liquid, and cavities filled with water vapor form. The cavities collapse as soon as the...

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