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I'm quitting attempting to make piston valves.

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: darkmilk » Sat Sep 22, 2007 9:02 pm

u mean too long
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Unread postAuthor: turbohacker » Sat Sep 22, 2007 9:20 pm

Yes, too long, sorry. :oops:
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Unread postAuthor: tylerthetatertosser » Sat Sep 22, 2007 9:46 pm

try wrapping yor piston with electrical tape if it moves to loosly or wobbles around


i had the same issue with the blow gun because to much air was getting around the piston, so a wrap of masking tape solved the issue.
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Unread postAuthor: SpudBlaster15 » Sat Sep 22, 2007 10:33 pm

Attempting to actuate such a large piston valve with a standard blowgun is not going to work too well. Blowguns simply do not have sufficient flow, unless you Mod it.
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Unread postAuthor: meatballs » Sat Sep 22, 2007 10:54 pm

or ideally you could use a secondary diaphragm valve, a sprinkler valve would be great, to actuate the main valve. this in turn could be actuated with a blowgun. or you could just use a ball valve.
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Unread postAuthor: frankrede » Sat Sep 22, 2007 11:18 pm

if you want to extend the barrel, simply add a coupler, they have perfect sealing faces too!
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Unread postAuthor: jackssmirkingrevenge » Sat Sep 22, 2007 11:50 pm

Don't give up when you're so close. That slot is far too big, if you piston isn't airtight then an equlisation hole is completely unneccesary, I agree with the suggestion that extendeding your barrel a little will hake it work.
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Unread postAuthor: jrrdw » Sun Sep 23, 2007 6:52 am

I've just noticed another potenchul(sp) problem. The fill and pilot set up mite also be contributing because there isn't away to shut off the fill port. Look at the 1st picture, when you open the ball valve the air supply is just wide open filling back into the pilot chamber as well as out the piloting port. Anybody else notice that???
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Unread postAuthor: Hubb » Sun Sep 23, 2007 6:56 am

I did notice that but I just figured he shut off the air supply from the tank.
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