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Piston seat question

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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Piston seat question

Unread postAuthor: whawhasiscumba » Mon Feb 25, 2013 8:45 pm

After browsing this forum for a while, I've gotten into pneumatics. I have made both a pcp airsoft rifle, 2" piston valve cannon (PVC), and a simple sprinkler valve cannon. I have been searching around for a galvanized steel piston valve, but the only obstacle for me is the piston seat. The fittings at my local hardware store will not thread in backwards like all the guys on this forum's do. Any suggestions to get around this?

Thanks,

whawhasiscumba
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Unread postAuthor: RBurke83 » Mon Feb 25, 2013 9:17 pm

Find a way to get the barrel to go like 3/4 of the way into the tee and seat the piston directly on the barrel. I think that's the area u mean by piston seat.
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Unread postAuthor: jackssmirkingrevenge » Tue Feb 26, 2013 1:49 am

As above, find something like a compression fitting that effectively allows the end of your barrel to be the seat.
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Unread postAuthor: whawhasiscumba » Tue Feb 26, 2013 8:35 am

Thanks guys for the help. We'll see what I can do this weekend at the hardware store :D
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Unread postAuthor: jackssmirkingrevenge » Tue Feb 26, 2013 12:05 pm

Make sure that you can cut the barrel pipe squarely, and finish the end sufficiently smoothly that it will seal properly as well as not damage the piston face seal.
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