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XRV valve?(need help)

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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XRV valve?(need help)

Unread postAuthor: Demon » Fri Oct 16, 2009 6:06 pm

The XRV valve:

http://www.youtube.com/watch?v=Qf4t9EnXxrs

(its not mine) That valve looks like it can be activated by only pression on the cooper tube with the nut on it.

I would like to make that valve (its a pretty small valve) to make a gun that looks like this one:

http://www.youtube.com/watch?v=wyD8XV3Fr9g

But a paintball version( i have a .707 " pvc pipe laiying around ) with a more performant valve ( the creator of that valve has made a better valve then the airforce one )

BUT, i need to get clarified on some points of the valve mechanism...

This is how i see it, but air can escape around the cooper pipe, so...what is wrong in my drawing?
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xrv airforce condor.JPG
That's it :
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Unread postAuthor: potatoflinger » Fri Oct 16, 2009 7:11 pm

I don't see anything wrong with your diagram, it looks like it should all work unless I'm missing something. One thing I would check though is the o-rings, as that is what is supposed to keep the air from leaking. Maybe try adding some lube to the o-rings.
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Unread postAuthor: Demon » Fri Oct 16, 2009 7:37 pm

Here is another drawing

What i dont understand is why is there a hole on the cooper pipe and why air would leak out of the barb hose where the spring is?...

(follow the red lines)
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xrv airforce condor.JPG (36.54 KiB) Viewed 2754 times
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Unread postAuthor: potatoflinger » Fri Oct 16, 2009 7:46 pm

I don't think that the second hole is necessary, you should be fine without it.
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Unread postAuthor: inonickname » Fri Oct 16, 2009 7:49 pm

It's a manual hammer valve, and you'll have big problems actuating it at larger calibers and pressures.
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Unread postAuthor: Demon » Fri Oct 16, 2009 8:05 pm

The sealing face would be having 1.5 square inches, wich means at 40 psi i should be forcing for 60 lbs or 30 kg...

Am i right? if yes, then i will have to reconsider that valve...
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