Posted by: Dale "Head_Hunters" DuPont on July 11, 2003 at 16:50:23

After researching the entire Internet of pneumatic valve suppliers AND talking to several tech support people that work for them, They all concur. Pneumatic O rings won't seal past 275 psi. The air leaks past them and would drain your air tank. Yes, there are O rings in hydralic systems that run thousands of Psi but they are closed systems the liquid that leaks by the O rings winds up in the liquid supply tanks. Flow rates through the valves are also an issue. The Higher pressure pneumatic valves have very small ports. So the flow rates are small. If the port was any size, the HPA would try to send the O ring down the hole. Same thing as when we screw off our air tanks and blow the O ring. Variable pressure regulators do exist but I'm having difficulty visualizing how your are thinking about applying it.

Follow Ups: Re: The basic problem is sealing HPA Mikheil 23:19:13 07/11/03 (0) Post a Followup Show your name as: DefaultRealnameBothNickname E-Mail address (eg: joeschmoe@aol.com): Show your e-mail address? DefaultYesNo Your Password: Don't have a password? CLICK HERE - Forgot your password? CLICK HERE Subject: Subject:Message: : After researching the entire Internet of pneumatic valve suppliers AND talking to several tech support people that work for them, They all concur. : Pneumatic O rings won't seal past 275 psi. : The air leaks past them and would drain your air tank. : Yes, there are O rings in hydralic systems that run thousands of Psi but they are closed systems the liquid that leaks by the O rings winds up in the liquid supply tanks. : Flow rates through the valves are also an issue. The Higher pressure pneumatic valves have very small ports. So the flow rates are small. If the port was any size, the HPA would try to send the O ring down the hole. Same thing as when we screw off our air tanks and blow the O ring. : Variable pressure regulators do exist but I'm having difficulty visualizing how your are thinking about applying it. [ Follow Ups ] [ Post Followup ] [ WARPIG Tech Talk - Air ]