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My QEV copper cannon

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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Unread postAuthor: chaos » Sun May 06, 2007 7:55 am

spudthug wrote:wow...and there is no way u tested it at 320 psi..that qev would have gone at 200..its rated to probably 145-160

ur gun is awesome..those compression fittings are pimp!!


agreed with the above. (edit: last post on the previous page**)

perhaps make a piston valve :idea: :?: :?:
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Unread postAuthor: spanerman » Sun May 06, 2007 9:56 am

sorry for the misunderstanding but the pilot arangment was tested to 300psi... i have tested the QEV to 200psi with no problem, it is a piston style QEV so no bursting diaphagms. ive got some of bushings and a coupler so its all build up and its much easyer to use than a ball valve.
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Unread postAuthor: Hotwired » Sun May 06, 2007 10:11 am

spudthug wrote:wow...and there is no way u tested it at 320 psi..that qev would have gone at 200..its rated to probably 145-160

I've been wandering around here using my cannon at 240psi for some time, the QEV's are rated to 300psi.

The QEV wasn't connected in the pilot pressure test anyway.
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Unread postAuthor: spanerman » Sun May 06, 2007 10:17 am

i think you will find the QEV's are rated to 10bar....147psi
http://www.airlines-pneumatics.co.uk/webcat/Detprod.asp?ProductCode=S070139
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Unread postAuthor: leeeeshad » Sun May 06, 2007 10:31 am

different places say different ratings, i think airlines just say that as that's what their other stuff is rated to
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Unread postAuthor: spanerman » Sun May 06, 2007 10:32 am

well seing as that where we all baught them from...
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Unread postAuthor: Hotwired » Sun May 06, 2007 2:34 pm

Technobots which flog the same model say 300psi.
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Unread postAuthor: spanerman » Sun May 06, 2007 3:08 pm

hmm.

i overtighend my blow and it cracked :( off to ebay to buy a replacement!
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Unread postAuthor: Hotwired » Sun May 06, 2007 3:16 pm

....

Don't tighten it any further with a tool than you could tighten it by hand without the tape on.
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Unread postAuthor: spanerman » Sun May 06, 2007 3:19 pm

i was useing hydraulic thread sealent and i was hand tightening..... damn monkey metal
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Unread postAuthor: Hotwired » Sun May 06, 2007 3:45 pm

o.0

Ok then it was a crap blowgun.
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Unread postAuthor: spanerman » Wed May 09, 2007 10:43 am

more pics
Image
Image
Image
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what do you think?
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Unread postAuthor: spanerman » Wed Jun 06, 2007 7:31 am

well my pilot arrangement is complete!!!! and the cannon is due for a breach-loader and suppressor. yay.
Image
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i solderd the main tube from a schrader valve into a 15mm blanking cap:) it looks good and has held 350psi:)
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Unread postAuthor: ShowNoMercy » Wed Jun 06, 2007 7:33 am

Nice gun, maybe a paintjob and clean it up a bit?
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Unread postAuthor: spanerman » Wed Jun 06, 2007 7:50 am

well its getting breach loader and suppressor soon, and id never paint the copper, you cant see it in the photos but when polished is the sex!!!
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