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Homemade QEV

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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Homemade QEV

Unread postAuthor: MalcomFrost » Fri Jun 20, 2008 5:19 am

Seen this interesting vid on YouTube, might just give this a shot to see how well works. Anyone else made a setup like this before?

[youtube]http://www.youtube.com/watch?v=b4ZgXqiaySc&feature=related[/youtube]

I know, the vid is in french, but lucky for me it happens to be my first language. I might even translate the vid and put it up myself, linking to the original to give credit where it's due, of course.
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Unread postAuthor: Carlman » Fri Jun 20, 2008 5:40 am

yea ive seen that on a french spud gun forum that i posted a link to a while ago, its a piston valve made of metal not a qev
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Unread postAuthor: MalcomFrost » Fri Jun 20, 2008 5:43 am

Thanks for the info. I'm still building my first pneumatic, so I'm still new in that respect. Still, it should work better than a sprinkler valve, and cheaper too. I picked up a RainBird for about $40 Canadian, but I think I could put this together for less than $20.
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Unread postAuthor: microman171 » Fri Jun 20, 2008 6:07 am

Even in the expensive country of New Zealand I could afford this for around $20 $30. Please do translate :d It would be much appreiated. Either that or you may be bale to draw a diagram?
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Unread postAuthor: POLAND_SPUD » Fri Jun 20, 2008 6:28 am

first of all, technically a qev valve is a piston valve.....

secondly in most countries the price of fittings needed to build a 'homemade qev' is almost the same as a QEV itself
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Unread postAuthor: Mitchza89 » Fri Jun 20, 2008 7:25 am

What and the holy hell? That's one hell of a piston valve...I can't get my head around on what the hell he used for a piston though...Looks like a hose barb...what does everyone else think?
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Unread postAuthor: sniper hero » Fri Jun 20, 2008 7:30 am

I saw it before
still didn't make one
and yes what is piston ?
and what could be used in place of it ?
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Unread postAuthor: Mitchza89 » Fri Jun 20, 2008 7:32 am

Hmm I've had alot of experience with piston valves.....but that's one of the best I've seen...
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Unread postAuthor: pizlo » Fri Jun 20, 2008 8:34 am

I'm sure with a parts list I could put that thing together. Email the dude/find the forum?

EDIT: I checked out some other of his videos, and by watching the 1in "QEV" video its obvious that its just a verry nicely made all metal barrel sealer. In the 1in he used all easy to figure out fittings, except his sealing face.
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Unread postAuthor: POLAND_SPUD » Fri Jun 20, 2008 10:06 am

yeah pizlo but there is one problem - the person who built it lives in france so it is quite possible that he used fittings that are available only in europe or france.... belive me I've tried builing the same valve myself but it turned out that without the parts that he had its easier to buy a QEV
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Unread postAuthor: THUNDERLORD » Fri Jun 20, 2008 10:42 am

It's just a copy of the "Slamma valve"!!! All the way in France! :lol: (jk)

Looks like the piston is a standard fitting (un-modified).
And the sealing face is the rubber washer it presses against (rather than being attached to the piston).

I've had a similar idea before.
Nice, simple parts he's made it(a piston valve) out of. 8)

EDIT: No,Ooops, just watched the video again. I was confused about the piston.
Still something simple.
Also noticed, at the end he says "very simple" Speaks some english?
E-mail the guy (Spike).
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Unread postAuthor: Carlman » Fri Jun 20, 2008 10:44 am

yea heres my thread about that forum that 'spike###' is off

http://www.spudfiles.com/forums/french-spudguning-t14285.html
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Unread postAuthor: neeewwww » Fri Jun 20, 2008 2:01 pm

Talking about QEV, where can I buy a 3/4" QEV?

Note: I live in Brazil... SOooOo the store must accept PayPal and International Sales.
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Unread postAuthor: Darkside 6ix » Fri Jun 20, 2008 2:29 pm

Yeah, that piston valve video has been bothering me because I dont know french. If anybody can translate it or even give me a partslist/video then I will give them a virtual hug :)
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Unread postAuthor: POLAND_SPUD » Fri Jun 20, 2008 2:44 pm

@neeewwww I am sure that there is at least several places where you can buy QEVs in brazil... believe me its only a matter of finding it I had the same problem with finding them in poland...

first of all it would be a good idea to find out what a qev valve is called in spanish (or portuguese?? - sorry I always have problems with remebering what language is spoken in Brazil) and then use google to find it
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