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SpudFiles Forum Index » Pneumatic Cannon Discussion » QEV Help

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QEV Help

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ainsworth112294

Posted: 08/26/2008 21:37 PM Post subject: QEV Help

Private

Joined: 26 Aug 2008
Posts: 12
23.17 Spud Bux

could someone please tell me the parts i wold need to build the valve on this gun(someone told me it was a QEV but idk) i need parts list and how to construct it and i wold like it to be the same size so please help me.

The valve on this gun http://www.spudfiles.com/forums/spare-parts-gun-t14952.html

A a r o n

Posted: 08/26/2008 21:47 PM Post subject:

Specialist

Joined: 07 Jul 2007
Posts: 49
41.89 Spud Bux

THe valve is called a QEV. You can't build them, you have to buy them.

http://www.spudfiles.com/spud_wiki/index.php/QEV

blind909

Posted: 08/26/2008 21:50 PM Post subject:

Colonel

Joined: 02 Aug 2007
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755.37 Spud Bux

He used a 1/4 inch QEV(It says in the description). It is just random parts he had laying around, so He probably couldnt even give you a parts list. You can find them at you local Fastenal Equipment, or a hydraulics store. Next time, use the Search function and the Wiki Button.

Edit-He used

6 Inches of 1/2 inch Galv. Steel
A 1/2 inch threaded 90* elbow
1/2 inch-1/4 inch bushing
5/16" Brakeline
1/4 inch "T"
(3) 1/4 Inch nipples
A Female Quick connect
1/2 inch endcap
Blowgun Valve

Last edited by blind909 on 08/26/2008 21:54 PM; edited 1 time in total

ainsworth112294

Posted: 08/26/2008 21:53 PM Post subject:

Private

Joined: 26 Aug 2008
Posts: 12
23.17 Spud Bux

well what would i use to make that 1/4 qev

blind909

Posted: 08/26/2008 21:55 PM Post subject:

Colonel

Joined: 02 Aug 2007
Posts: 645
755.37 Spud Bux

ainsworth112294 wrote:

well what would i use to make that 1/4 qev

You Dont make the QEV, You buy the QEV, its just the valve. Look at my edit in the above post.

ainsworth112294

Posted: 08/26/2008 21:58 PM Post subject:

Private

Joined: 26 Aug 2008
Posts: 12
23.17 Spud Bux

eddbot i saw blind 909s post first not arrons and blind said the guy made his or i was just confused

so where wold i buy 1 of these valves and what does the blowgun do[/quote]

microman171

Posted: 08/26/2008 22:39 PM Post subject:

Staff Sergeant

Joined: 30 Apr 2008
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Mc Master Carr has them I think (not really into the whole QEV scene as they would cost so much to ship to New Zealand). What you gotta do is make a camber and connect that to the in port. They you put a barrel on the out port (or a piston valve). Lastly you put a pilot (eg a blow gun valve) on the pilot port.

potatoflinger

Posted: 08/27/2008 3:52 AM Post subject:

Seasoned Spudder
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Joined: 02 Nov 2006
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This is where I bought the QEV that is used on that gun. If you live in the U.S. there is a good chance that they have a store near you, if not, you could try McMaster.

The blowgun is used to pilot the QEV.

far_cry

Posted: 08/28/2008 10:16 AM Post subject:

Sergeant

Joined: 20 Aug 2008
Posts: 85
143.75 Spud Bux

there is a video how to biuld a qev
http://www.youtube.com/watch?v=b4ZgXqiaySc&feature=user&fmt=18

Carlman

Posted: 08/28/2008 10:38 AM Post subject:

The Aussie
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microman171 wrote:

pilot goes on the out port not pilot port (EXH) barrel goes on EXH

frankrede

Posted: 08/28/2008 11:18 AM Post subject:

Sangheili

Joined: 20 Jul 2006
Posts: 3001
556.26 Spud Bux

far_cry wrote:

there is a video how to biuld a qev
http://www.youtube.com/watch?v=b4ZgXqiaySc&feature=user&fmt=18

Thats just a piston valve made out of french plumbing parts.

far_cry

Posted: 08/28/2008 13:25 PM Post subject:

Sergeant

Joined: 20 Aug 2008
Posts: 85
143.75 Spud Bux

frankrede wrote:

far_cry wrote:

there is a video how to biuld a qev
http://www.youtube.com/watch?v=b4ZgXqiaySc&feature=user&fmt=18

Thats just a piston valve made out of french plumbing parts.

if you mentioned that , the ((just a piston valve)) you call it , whats the difference between him and the qev and ho is better??

MrCrowley

Posted: 08/28/2008 13:56 PM Post subject:

Blizzard of Ozz
<b>Moderator</b>

Joined: 23 Jun 2006
Posts: 6137
3165.90 Spud Bux

A QEV is just a piston or diaphragm valve that is commercially made to release air quickly. They come in all shapes and sizes.

Which is better depends on a huge amount of factors.

far_cry

Posted: 08/28/2008 14:06 PM Post subject:

Sergeant

Joined: 20 Aug 2008
Posts: 85
143.75 Spud Bux

in high pressures 400 psi and up

POLAND_SPUD

Posted: 08/28/2008 14:17 PM Post subject:

Brigadier General

Joined: 13 Oct 2007
Posts: 969
2423.31 Spud Bux

hmmm lets put it like this...
every dog is an animal but not every animal is a dog Wink

it the exactly the same with QEVs&piston valves

Every QEV is a piston valve but not every piston valve is a qev...

a QEV is just a piston valve that you can buy..

you can build your own piston valve if you want to (or if you can't find QEVs in isreal)... it's easy if you understand how they work... look here --> piston valves

I have this model of a QEV valve http://www.teamonslaught.fsnet.co.uk/qev.jpg (it's one of the most popular type/model in europe) and I use it at up to 500 psi and they are fine at such pressures...

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