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QEV not actuating!

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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QEV not actuating!

Unread postAuthor: gsw2 » Tue Jul 12, 2011 8:24 pm

On occasion my QEV doesn't activate. My QEV is a spring type and not purely moved by air, could this be the problem? Any idea what could be the cause and/or solution? It's extremely annoying! For times it works great non stop and then another time I will go to have a shoot and air just glides gracefully down the barrel!

Thanks.
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Unread postAuthor: POLAND_SPUD » Tue Jul 12, 2011 9:11 pm

QEV is a commercially made quick action valve... what you described seems to be a homemade piston valve

try to be more specific

ohh and increase the fit of the piston - that should help
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Unread postAuthor: gsw2 » Tue Jul 12, 2011 9:23 pm

This is a QEV not a homemade piston, I would have made one but for the life of me couldn't figure it out or be bothered figuring it out :p

How do I increase the fit of the piston?
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Unread postAuthor: Gippeto » Tue Jul 12, 2011 10:58 pm

Factory qev. Did it come with a spring in it? How about a picture?
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Unread postAuthor: far_cry » Wed Jul 13, 2011 6:09 am

Gippeto wrote:Factory qev. Did it come with a spring in it? How about a picture?


OH gippeto ,nice to see you man. what happened with the coax ,did u run it 300 psi already ?

topic:

did u installed it as it should be?
can you give us a picture of it ?
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Unread postAuthor: Crna Legija » Wed Jul 13, 2011 6:27 am

far_cry wrote:
Gippeto wrote:Factory qev. Did it come with a spring in it? How about a picture?


OH gippeto ,nice to see you man. what happened with the coax ,did u run it 300 psi already ?


do you mean this coax? because he took it a bit further than 300psi :lol:

dam, I love that piston
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Unread postAuthor: Gippeto » Wed Jul 13, 2011 11:38 pm

gsw2....how about an update?? Did you put the spring in there??



FarCry...I'm sure you meant 3000psi. But no. It's gathering dust.

No good reason, N2 tank is full and I've lead for casting...just a general lack of desire where the co-ax is concerned. Other projects are getting my attention though...I'm not "doing nothing". :wink:

Good to see you're well. :)
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