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High Pressure Cannon Valve

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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High Pressure Cannon Valve

Unread postAuthor: spudkpi » Thu Jan 14, 2010 8:56 pm

Hey guys I'm working on making a high pressure barrel sealing tee piston for my upcoming co2 gun. I have here some pictures that will explain themselves... let me know what you think... thanks.

Edit: Sorry I haven't really posted since 2006 and I forgot the picture upload order. :oops:[/u]
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Attachments
DSCF1051.JPG
This is the general layout for the valve. From left to right it's a 1/2" to 3/4" bushing, 3/4" tee, 1/2" copper male adapter which will be JB'ed inside the last piece which is a 3/4" nipple.
DSCF1055.JPG
The copper male adapter JB Welded inside of the brass nipple because it made a nice fit and provides a good surface for the inner barrel O-ring seal I will make.
DSCF1048.JPG
My cat Carlton who likes to help me put the pieces in the correct firing order for high pressure sealing!
DSCF1058.JPG
Epoxy piston mold. Old pill bottle.
DSCF1060.JPG
Dried epoxy piston which I will lathe tomorrow to fit the insiide diameter of the brass tee and also have an O-ring groove to seal inside the copper adapter.
Last edited by spudkpi on Fri Jan 15, 2010 4:51 pm, edited 1 time in total.
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Unread postAuthor: deathbyDWV » Thu Jan 14, 2010 9:11 pm

I think it's nice. A couple of questions though...
What pressure will you be running at?
Single shot?
What about a stock?
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Life's too short to mark off the items on your wish list...
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Unread postAuthor: twizi » Thu Jan 14, 2010 9:50 pm

[quote]I will lathe tomorrow to fit the insiide diameter of the brass tee and also have an O-ring groove to seal inside the copper adapter.
[quote]

you need a sealing face to seal to the barrel piece or thas how ive done it




what epoxy u using?

oh by the way looks nice so far
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dont play with airsofter with 1000$ gun and play with a 5 dollar pair of glasses
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Unread postAuthor: spudkpi » Thu Jan 14, 2010 10:52 pm

The epoxy is West Systems Marine Epoxy and am going to throw it on the lathe so it will have a neoprene sealing face and a section that will seal inside the barrel also with an O-ring. Not sure on the pressure yet. Hopefully I can finish the piston tomorrow and get the system running for some tests
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