Below the five different forms of cavitation. Let’s look at how to prevent each.

Vaporisation Cavitation
Try the following:

• Reduce motor speed (RPMs). Note: Slowing the pump down will reduce flow rate and head pressure.
• Install an impeller inducer
• Incorporate a booster pump into your pump system. This will take some of the stress off of your primary pump.
• If possible, reduce the temperature of your pump, liquid, and/or other components.
• Increase liquid level around the suction area.
• If possible, try to increase the diameter of the eye at the centre of your impeller.

Turbulence Cavitation
Preventative steps:

• Evaluate all components to ensure that they can take the strain of the flow rate, volume, and properties of your transported fluid. Replace components as needed.
• Ensure you are not exceeding your pump’s manufacturer performance guidelines. A pump system which is pushed too hard will inevitably fail. Such as running the pump off the end of the performance curve. It is best to increase
• Increase pump suction line size to reduce turbulence

Vane Syndrome Cavitation
Preventing vane passing or vane syndrome cavitation is relatively easy. Ensure that the free space between your impeller and its housing is 4% of your impeller’s diameter or more. Any less and cavitation will begin.

Internal Re-Circulation Cavitation
In order to prevent this type of cavitation, follow this process:

• Open up your pump’s restricted discharge valve and assess the inside for any blockages.
• Unclog the downstream filter of any debris or accumulation.
• Ensure that the check valve has been installed correctly. A common mistake during installation is for this valve to have been fitted backwards.
• Check the discharge valve and make sure that it is open and not closed.
• Assess pressure at the discharge line. If there is a problem with head pressure then it could be that the header isn’t up to the job and needs replaced, or the system is operating close to the shut-off head.

Air Aspiration Cavitation
This can be a tricky one to prevent. Even the smallest amount of air being sucked into the system could over time cause cavitation. Going over your installation with a fine tooth comb to make sure all joints and connections are sealed properly, is the best approach.
Prevent this type of cavitation by:

• Regularly checking joint rings on any suction piping to make sure they haven’t perished.
• Assess whether foaming liquid is causing an accumulation of bubbles. If so, run the system slower, or periodically empty the system of all contents, including air.
• Check all O-rings and any secondary mechanical seals.
• Ensure all piping has no cracks or signs of erosion.
• Make sure that all system materials are capable of handling the liquid you intend to transport. Viscous, abrasive, or acidic liquids can erode materials to the point where air can be sucked into the system.
• Regular checks of valves, joints, and anywhere else that may seem likely to fail at some point. As soon as anything shows signs of failure, replace.


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