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mcmaster carr qev question

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: Maniac » Sun Apr 06, 2008 3:57 pm

Im not sure about the pressures but they are special pnuematic compontents unless you have store that specializes in pneumatics you wont find one any where.

Oh please dont double post either.
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Unread postAuthor: beans » Sun Apr 06, 2008 6:16 pm

anyone know the shipping cost for one of those to Los Angeles?
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Unread postAuthor: beans » Mon Apr 07, 2008 3:05 pm

sorry for the double post...and I'm not trying to bump either, but I saw that someone made a QEV, or a piston valve, whatever it's called, out of some rubber gasket things, a bolt, and ring made out of tennis ball inside a copper tee....it seems simple to make, but I couldn't see the inside of the tee or what has to be done, can anyone explain the process? Someone told me that for a 1 inch barrel, it's better to have a sprinkler valve than to use a 3/4 inch qev...can't I get a 1 inch qev somewhere?
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Unread postAuthor: POLAND_SPUD » Mon Apr 07, 2008 5:56 pm

I have a 1/2" QEV (the same model as the on used here --> http://www.spudfiles.com/forums/dual-3- ... t4650.html)
and I use it at pressures above 300 psi without any porblems... some say that al-xg has used them at 800 psi but stay below 400 - 500 psi and you should be fine
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Unread postAuthor: beans » Mon Apr 07, 2008 6:18 pm

where do I get one like that? that's the problem I'm having right now.
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Unread postAuthor: POLAND_SPUD » Mon Apr 07, 2008 6:28 pm

they are the most common type of qevs in europe I think that you can order one from UK

use search function next time
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Unread postAuthor: beans » Mon Apr 07, 2008 6:45 pm

I live in the US....but I used the search function and the only thing I could find was to order it from mcmaster.com, but they don't carry that type, and the closest one I could find to it was 3/4 inch...
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Unread postAuthor: POLAND_SPUD » Tue Apr 08, 2008 7:50 am

so what's the problem? - order them from mcmaster - you can use them above their pressure rating - I am gueassing htey should be fine up to 300 psi
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