Well, epoxy, as always, fixes everything. Works great now. Thanks for the help.

Any 1/2" high pressure QEVs anyone know of? Ball valves are great for troubleshooting at the beginning, but their performance isn't that great.

Cyanoacrylate glues failed the first battery of seals. I put some high strength epoxy on overnight, we'll see how it goes.

So essentially I need some sort of fastener. Just glue will probably not cut it? I see no reason to add a nut or anything that will enter the barrel and restrict flow unless I really have to.

Also it is important to note that the washers on the piston are threaded, and do not freely slide on the ...

The piston itself.



Panorama of the entire assembly.

Hmmm, looking at how you guys define coaxial on this forum, I detract that statement. I actually have got the valve to work, only problem is the rubber gasket on the seal face keeps falling off the piston after 1 actuation. So I've decided to just attach the gasket to the barrel lip itself.

^Exactly. I'll work on getting some pics.

I currently am making a new all metal spudgun, however this is my first piston valve design.

Currently, the spudgun is completely finished, the only problem is that the piston valve is not working. Currently I air it with a 12g. seems fine, has no leaks. I open my pilot valve (a 1/2" ball valve ...