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PRVs keep leaking – Air Compressor Pressure Relief Valve Leaking

Published Categorized as Air Compressor Valves No Comments on PRVs keep leaking – Air Compressor Pressure Relief Valve Leaking

by George
(Eastanollee GA , USA)

Every new PRV I have installed on my air compressor leaks air.

It starts to leak just before set point and then wont stop till it drops 20-30 PSI, why?

One model of a compressor pressure relief valve
One model of a compressor pressure relief valve

George, if all (how many?) PRV’s you have put on your air compressor leak air (that means it blows off) just before your air compressor reaches the set point to cut out of that air compressor, then consider that your new PRV’s have a too low cracking pressure?

While you cannot adjust the basic PRV, you can acquire ones that blow off at a pressure level that is higher than the normal cut out of the pressure switch.

When you go to get the next one, ask about the pressure settings of the blow off on the new PRV.

On the other hand, PRV’s are not always spring loaded and if yours is shutting off when the pressure drops by 20-30 PSI, I have to wonder if we are really talking about the PRV at all? I’ve uploaded an image of one so you can check.

Please tell us the make and model of your air compressor, and a photo of it and the PRV to which you refer in your post and we’ll see if we can dig deeper into this for you.

Useful Pages on Air Compressor Leaks


New comment? New question? Please add it here along with photos to help others help you with your compressor and equipment problem!

By Bill Wade

About Air Compressors has been helping folks with their Air Compressor Problems since 2002 online. We're a community of DIY and Compressed Air professionals who are keen to support everyone across the globe with their air compressor issues and troubleshooting. Whether you're trying to identify an old air compressor, or troubleshoot an error code on a sophisticated new industrial air compressor - the community at About-Air-Compressors.com is here to help you

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