Causes of cavitation

There are two types of cavitation that may occur in reciprocating positive displacement applications: suction and discharge. Suction cavitation occurs ahead of the suction stroke, when the pump is starved of flow, either from being in a high-vacuum or low-pressure environment. The opening of the valve is delayed by inertia, causing a lower flow rate on the suction side and resulting in expansion, pressure decrease, and the formation of bubbles close to the plunger.


Common causes of suction cavitation include:
  • Clogged filters
  • Pipe blockage on the suction side
  • Poor piping design
  • Pump running too far right on the pump curve
  • Conditions not meeting NPSH (net positive suction head) requirements

Discharge cavitation occurs when the pump’s discharge pressure is too high. Under these conditions, it’s difficult for the fluid to flow out of the pump. Instead, it continues moving at high velocities inside the working chamber, forming bubbles in the process.
Common causes of discharge cavitation include:
  • Clogged filters
  • Pipe blockage on the discharge side
  • Poor piping design
When working with pumping applications in a processing industry, cavitation should always be kept in mind; being able to recognize the warning signs and identify the root causes of cavitation in your machinery can significantly reduce the risk of long-term damages, saving both time and money.

Water pump repair dubai  has nearly a 5 years of experience assisting clients with pump issues such as cavitation. Our pump components are designed to preserve expensive parts such as crankshafts and power frames by transferring the majority of wear to less expensive, more expendable parts such valves, plungers, and packing.

Call us today to talk to our engineer.​

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