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Another Sprinkler Valve Problem

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: potatoflinger » Sun Feb 17, 2008 3:41 pm

Yeah, the problem is that the valve is on backwards, the solenoid should be on the barrel side of the sprinkler valve. Just unscrew the sprinkler valve and turn it around. (there should be an arrow on the valve, it needs to be pointing in the direction of the barrel) The way you have it now, the air probably just leaks out of the barrel when you try to fill the gun.
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Unread postAuthor: pbpenguin5 » Tue Feb 19, 2008 1:02 am

fireman565 wrote:pbpenguin5..

Same problem I was having... your mod is hendering the movement of the diaphragm AND what dewey-1 said above, valve is in wrong direction...lol

On top of the valve, you seem to have the threaded 3/8" fitting tightened down to the nut, which would leave a few threads showing on the underside of the valve top. It that's the case, the extra threads are restricting the diaphragm from opening all the way. Either back the fitting out until the threads are flush with the inside of the top, file a couple of threads off of the fitting so where you can actually tighten the fitting back down tight, and/or mod the white tip in the center of the diaphragm. I filed threads off and filed down the center tip down to almost level with the actual diaphragm. Works great now.
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you're amazing.

i would never have thought of that and i'll do that asap.

as for the valve on backwards, lol i did that just in that picture, it's not actually like that, it's on correctly on the finished product.

thank you everyone, hopefully that will solve my problem :wink:
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Unread postAuthor: fireman565 » Tue Feb 19, 2008 2:37 pm

pbpenguin5,

I failed to mention that you will need to apply some type of epoxy to the top once you have sanded down the plastic. There will be a small hole in the center. You can't miss it once you've sanded it down.
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Unread postAuthor: pbpenguin5 » Tue Feb 19, 2008 5:11 pm

fireman565 wrote:pbpenguin5,

I failed to mention that you will need to apply some type of epoxy to the top once you have sanded down the plastic. There will be a small hole in the center. You can't miss it once you've sanded it down.


kk thanks
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Unread postAuthor: pbpenguin5 » Tue Feb 26, 2008 6:04 pm

to follow up,

thank you everyone, and dremeling down the little white piece and putting some JB Weld fixed my problem.

as soon as i paint it it'll be up in the finished cannons section and instructables hopefully :wink:

thanks fireman
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