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how does a qev valve work?

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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how does a qev valve work?

Unread postAuthor: Tijn_416cs » Sat Mar 12, 2016 4:51 am

I'm making a semi auto airsoft gun, and I heard alot about quick exhaust valves.
I want to use 12gram co2 cartridges and I thought about having a set up like 12G co2->Qev->schradervalve or blowpistol
would that work? Thanks
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Re: how does a qev valve work?

Unread postAuthor: Hurricane Air Arms » Sat Jul 16, 2016 8:40 am

12 gram Co2 cartridges won't get you remarkably far on a QEV. And you should search the forum and the internet, especially youtube, for diagrams and workings of a QEV...

They're backpressure piston valves. Air inside a T-Piece is dumped out of a trigger behind the piston to create a pressur imbalance on the barrels side, the piston is shoved back by force and the rest of the air in the T is briefly dumped down the other exit - the barrel.
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