Pneumatic Valve
Can I use plumbing check valves in a pneumatic system?
I understand that air behaves as a fluid so therefore i figure it may work but i would like some verification since water and air are molecularly different. I would plumbing grade check valves temporarily for testing because they are cheaper and easier to get. I would eventually get pneumatic grade valves once i know that my system works as intended.
Yes, quite often you can. Many smaller screwed brass valves have AWG ratings which means “air, water gas”. (That may be OWG, oil, water, gas) These are around the 125 -250 psig rating. This includes gate, globe, check. I do not know what a plumbing grade or pneumatic grade valve would be in this pressure range. We used the same valves, 125-250 psi screwed or 125 – 600 pound ANSI flanged and welded , equally for steam, water, compressed air and some gasses based on the pressure ratings. We used the Power Piping Code for nearly all services.
When we were in high pressures gasses we used CGA ratings. And there were specialities for extremely high pressure gasses.
Servo pneumatic valve demo
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