SpudFiles

This is the blow gun which acts as the fill/exhaust for my quick exhaust valve. It fills from the bottom then I disconnect the compressor and pull the trigger an it lets pressure out the bottom. Problem is it isnt ment to store pressure on the top side and let it out the bottom, its ment the let it out the top.
So when I fill it to anything over 120PSI the blow gun get stuck shut and I cant fire it. Any solutions? All Iv had to do so far is press the pressure releaf button on the side not shown, but I would prefer to pull the trigger.

take it off,and attach the side attached to the compressor to the gun,so you flip the direction of flow. that seems like a lot of extra work,why don't you just continue hitting the pressure relief button on the side ?

I will probly and it is only when I get past 8BAR.

yeah depending on the size of your cannon you dont have to really go past 8bar