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Chamber not holding air

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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Chamber not holding air

Unread postAuthor: Claybob86 » Sun Jan 14, 2007 4:40 pm

Well i got my gun all painted today, and put it all together. then decided to fill it up with air before putting any ammo in it to make sure everything works properly. Well i put the air hose to the tire valve and the air would blow though the chamber and out the barrel. the seals for the valve are clean and in good shape. im pretty sure there is no air getting to the back side of piston to stop the air from getting out.

im using this valve http://www.rainbird.com/parts/images/thumbnails/B36296_lg.jpg?id=2398

anybody ever had this happen? and for the record, i searched for 30 minutes trying to find a thread about somebody having this problem and couldnt find one, so dont flame me for asking for help.
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Unread postAuthor: benstern » Sun Jan 14, 2007 4:46 pm

Are you sure the valve is installed din the right direction?
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Unread postAuthor: jrrdw » Sun Jan 14, 2007 4:55 pm

You said you painted it 1st, when you solvent weld PVC it's saposed to be clean and dry. You didn't push painted ends up into the fittings did you? You should also let it cure for 24 hours before testing.
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Unread postAuthor: Claybob86 » Sun Jan 14, 2007 5:09 pm

benstern, yes, the valve is installed int he right direction

jrrdw, i glued everything yesterday around noon. when i say "put together" i mean screw the barrel and chamber onto the valve, and also assemble the blowgun contraption. sorry about that :)
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Unread postAuthor: jrrdw » Sun Jan 14, 2007 5:21 pm

I've never seen anyone use that kind of valve before??? Much less a modded one. Try lubracating the diaphram.

off topic -- Is that you in your avatar?
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Unread postAuthor: Claybob86 » Sun Jan 14, 2007 6:07 pm

i figured it out, i ended up jbwelding the wrong part, he he. ill get another valve tomorrow. and know that FLAVA FLAAVVVVVV in my avatar
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Unread postAuthor: Flying_Salt » Sun Jan 14, 2007 6:26 pm

I've never seen a valve like that. It looks good for a little over/under cannon.
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Unread postAuthor: Claybob86 » Sun Jan 14, 2007 6:30 pm

i think it will work well, heres a pic of the gun, ill be getting another valve tomorrow

Image
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Unread postAuthor: medievalman » Sun Jan 14, 2007 6:31 pm

i have a valve like that, it's a 3/4 inch, and it really reduces the number of fittings required. just one question, CLAYBOB, how did you mod it? it doesnt have a diaphragm like normal sprinklers. how did you do it?
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Unread postAuthor: Bluetooth » Sun Jan 14, 2007 6:31 pm

Looks good. I like the paintjob.
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Unread postAuthor: Claybob86 » Sun Jan 14, 2007 6:34 pm

medievalman wrote:i have a valve like that, it's a 3/4 inch, and it really reduces the number of fittings required. just one question, CLAYBOB, how did you mod it? it doesnt have a diaphragm like normal sprinklers. how did you do it?


well thats my problem... ha ha, i jbwelded over the diaphragm on accident. im probably going to take off the main electronic solenoid, then put the blowgun on that end, that should work, shouldnt it?
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Unread postAuthor: medievalman » Sun Jan 14, 2007 6:35 pm

actually, i think that would work. tell me if it does. i will be making my gun tomorrow, but i will probably use electric activation.
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Unread postAuthor: Claybob86 » Sun Jan 14, 2007 6:38 pm

i hope it does, do you have aim or msn messenger?
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Unread postAuthor: MrCrowley » Sun Jan 14, 2007 6:50 pm

Sweet paint job :P
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Unread postAuthor: Pyro Ninja » Sun Jan 14, 2007 7:01 pm

Great paint job
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