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Need help getting Semi consistantly.....

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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Unread postAuthor: BearMan » Sat May 29, 2010 8:52 pm

Donna know.....
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Unread postAuthor: BearMan » Sat May 29, 2010 8:52 pm

Well.... Actually the piston doesn't slide when the pilot side is sealed. The felt seal around the piston and the vacuum hold it in place. When it was just in the housing, it would slide under its own weight. I was trying to make it a smooth and slippery fit. I can re-apply the felt seal and get a tighter fit.

My pilot valve is a Rain Bird 1" sprinkler valve.

I have a chamber on a 90 deg. elbow that screws into the bottom of the 2" Tee Piston valve. The air inlet is a air hose barb that is screwed into the bottom of the elbow.... just below the chamber.
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Unread postAuthor: BearMan » Sat May 29, 2010 8:53 pm

Image
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Unread postAuthor: ramses » Sat May 29, 2010 10:17 pm

C-C-C-C--Combo breaker!

seriously, use the edit button.


you should really loose the pop bottle, the gun will be much safer and cooler looking without it. If the piston seals that well with the pipe it slides in, you may have a sealing face issue. How soft is the rubber? Is the piece of pipe inside the "T" square, flat, and clean?
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Unread postAuthor: BearMan » Sun May 30, 2010 9:28 pm

ramses wrote:..... If the piston seals that well with the pipe it slides in, you may have a sealing face issue. How soft is the rubber? Is the piece of pipe inside the "T" square, flat, and clean?


The rubber is just a rubber seal I got at Home Depot. It is 0.0625" thick and seems soft to me.....

The facing pipe was cut in my lathe. It seems like a good fit....... I did round it slightly so there would be no sharp edges and cleaned it well.

Barry
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