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where can i buy qev

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where can i buy qev

Unread postAuthor: far_cry » Sun Jan 10, 2010 10:47 am

does anyone know where to buy qev on the net include shipping world wide except eBay?

i found this in eBay
http://cgi.ebay.com/Pneumatic-Quick-Exhaust-Air-Valve-1-2-Brass-Body_W0QQitemZ260415408354QQcmdZViewItemQQptZPneumatic_Hydraulic_Valves_Parts?hash=item3ca1f7c8e2

38 $ include shipping is that good price for 1/2" qev made in china ?

and i read in this site that some of you tested and use this qev with high pressure up to 850psi ,so can i use it with 650 psi always ?
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 10, 2010 11:00 am

That's just over 25 euros, you can make your own piston for much less ;)
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Unread postAuthor: far_cry » Sun Jan 10, 2010 12:38 pm

i made piston valve, but i get some issues with it
leaking (that i can fix) the major problem is the piston seal
because i use such i high pressure 700psi the seal always cut off and that happen even with 2mm seat smooth surface

i looked for hard rubber that i can machine it with the shape of piston but couldn't find .
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 10, 2010 12:48 pm

Can't you enlarge the seat externally by epoxying some extra tubing, like I did here?
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Unread postAuthor: far_cry » Sun Jan 10, 2010 7:38 pm

jackssmirkingrevenge wrote:Can't you enlarge the seat externally by epoxying some extra tubing, like I did here?


no i cant its very limited . 3/4" T

just a hard rubber piston will help me
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Unread postAuthor: MrPed » Sun Jan 10, 2010 9:35 pm

I just bought this the other day:

http://cgi.ebay.com/Pneumatic-Quick-Exh ... 3ca578066a

But, I have yet to test it. When I get around to testing it I will let you how it goes.
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