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Originally Posted by Leo M
Look at page 4 of the 2004 Pneumatics Manual. The primary pressure regulator, the Norgren, is required in-line right after the tanks to limit the working pressure to 60 psig. This is a "relieving regulator" - if the pressure on the downstream side (cylinders & solenoid valves) increases above 60 psig - say, by pushing on an arm actuated by a cylinder - the regulator will relieve the pressure by venting air. There is no need to jump through hoops to limit working pressure to <= 60 psig; the main regulator takes care of that automatically.
Now, while you have the manual out, why not read the entire thing thoroughly, so you understand how all of the components work together? It will pay off in the long run, only takes about 30 minutes, and will save pages of posting.
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Yes on the side between the regulator and the side of the cyclinder that is open. If you have this side open and the cyclinder is fully extended and you push it back. Air over 60 psi will be forced out of the regulator.
However on the other side of the cyclinder to where the air is stopped there is no release and there is a possibility that it will go a little over 60 psi as much as 66 psi. This would occur during a stop during an extension. During a retraction this problem wouldn't occur because of the norgen relief valve.
And don't think that reading the manual will give you answers to many of these problems. The manual is very vague and only give you very little info other some of the capabilities and pictures so that rookies will know what to look for in the kit. I am sure these people like myself have read the manual and rules several times over and have a good general idea of what to look for but the only way you can be for sure is if you hook it up and test it.