A system should be designed to minimize cavitiation – both in the pump and throughout the network accessories.

Cavitation occurs when the system pressure decreases below the vapor pressure. This creates very small bubbles, which quickly collapse when the pressure returns above the vapor pressure point.

When the bubbles collapse, they emit pressure shock waves that erode plastic and metal surfaces, and you can hear a sound.

Needless to say, cavitation should be avoided, especially in the pump.

Ensure that the pump is working in the specified range as published by the manufacturer. Most importantly, ensure that the net positive suction head available does not drop below the vapor pressure of the liquid. The Net Positive Suction Head (NPSH) available must be higher than the NPSH required.

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