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600 psi 3/4" QEV Launcher

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: jackssmirkingrevenge » Wed Jan 05, 2011 9:23 am

Butch902 wrote:isn't the max psi rating for a 3/4'' QEV 150- 175max?


A valve rated for 150 psi won't explode at 151 psi, while exceeding pressure ratings is not recommended there is a certain safety factor which some people choose to slim down, people have used typical QEVs to 500 psi and beyond without failure to my knowledge.

Of course though failure is not the only risk, even if it doesn't blow up you will be increasing wear and tear on the piston/diaphragm.
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Unread postAuthor: Crna Legija » Wed Jan 05, 2011 9:48 am

yea but they can take a lot more, but i wouldn't go any more than that. also don't kick up dead topics
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Unread postAuthor: Dave_424 » Thu Jan 06, 2011 5:30 am

Wow, way to dig up an old post :)

But yeah, the rating is around 150 psi but it can take a lot more. 600 psi firings and there is no visible damage to the piston face or anything :)

I don't post much here anymore, moved onto bigger things, mainly building PCP airguns with operating pressures of 200-250 bar :)

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Unread postAuthor: jackssmirkingrevenge » Thu Jan 06, 2011 5:55 am

Dave_424 wrote:building PCP airguns with operating pressures of 200-250 bar :)


Still worthy of being posted here *hint hint*
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Unread postAuthor: Dave_424 » Thu Jan 06, 2011 7:02 am

Okay, when I gave the time, I will :)

Might have a browse around the forum, see what you crazy guys have been up to :)

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Unread postAuthor: Zeus » Thu Jan 06, 2011 10:12 pm

Certainly post some of your work, I don't think I've seen mention of homemade PCPs here, let alone seen a built one.

Even a few pictures would satiate some.

The QEV gun is very nice also.
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 07, 2011 2:27 am

Zeus wrote:I don't think I've seen mention of homemade PCPs here, let alone seen a built one.


Gipetto's work here is quite impressive, there are several other PCPs on the site but most of them are modded commercial items.
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Unread postAuthor: Gippeto » Fri Jan 07, 2011 10:33 am

Another one...more coming. :wink:

http://www.spudfiles.com/forums/little- ... 21083.html

Dave's doing some rather "nifty" stuff with the Stealth.

Post it up Dave... :)
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Unread postAuthor: jackssmirkingrevenge » Sat Jan 08, 2011 12:32 am

Gippeto wrote:Dave's doing some rather "nifty" stuff with the Stealth.

Post it up Dave... :)


If Dave is in the UK and "nifty" means 12.01 ft/lbs +, I would understand his reasons for not posting.

Zeus, it seems your complaints have been heeded;)
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