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QEV HP test gun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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QEV HP test gun

Unread postAuthor: Lockednloaded » Thu Jun 03, 2010 4:13 pm

I got my QEV in the mail the other day, so i decided to throw together a little gun to test the power. It is probably 800psi capable, but i take it to 200 psi which is my limit atm. I made it as compact as possible keeping the pilot and fill inline with the chamber. This is a spare parts gun, so yes some parts were improvised like the barrel attachment method. The setuo may look a little awkward, but it can be comfortably shot with one hand and reasonable accuracy.

The whole Gun:
Image

The valve area:
Image

Shotgun spread from 50ft with airsoft BBs:
Image

How I hold it:
Image
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Unread postAuthor: theBOOM » Thu Jun 03, 2010 5:34 pm

Nice valve, I'm thinking of buying the same one from ebay, its pretty cheap and its 3/4"
What gun do you plan making for it?
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Unread postAuthor: Lockednloaded » Thu Jun 03, 2010 5:45 pm

I would buy one if I were you, its a great valve and a great price on Ebay. I plan on building a paintball semi, but it will be used on a variety of different launchers.
on another note,
I added a new pilot system, and it has improved the power by a lot. It is the same pilot system from my copper dueling pistol
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Unread postAuthor: ramses » Thu Jun 03, 2010 5:52 pm

hey... I know that QEV...

I really like the way you did your trigger.

And I wouldn't take it to 800psi with the PVC barrel, especially attached the way it is. You might have to reinforce the stock diaphragm thing in the QEV.
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Unread postAuthor: c11man » Thu Jun 03, 2010 6:50 pm

i used that same qev up to 700 psi but 800 might be pushing it. and the diaphram should hold because it has supports in the valve seat to prevent it from blowing out
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Unread postAuthor: pizlo » Thu Jun 03, 2010 7:42 pm

Which brand QEV is that? Detrol? asco? where did you get it?
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Unread postAuthor: Lockednloaded » Thu Jun 03, 2010 8:10 pm

IIRC its a detrol 3/4" super quick exhaust valve. I got it off of ebay for 20 dollars. I don't plan on using it past 400 psi, but thanks for he info c11man
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Unread postAuthor: grock » Fri Jun 04, 2010 4:21 am

what are you guys generally searching for to find qevs? an ebay search for "QEV" turned up only small (3/8") and paintball ones
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Unread postAuthor: Gun Freak » Fri Jun 04, 2010 7:23 am

You have to type out "quick exhaust valve".
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