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10,000psi rated qev... Yes, I said 10,000psi

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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10,000psi rated qev... Yes, I said 10,000psi

Unread postAuthor: jeepkahn » Thu Mar 26, 2009 12:49 pm

http://www.weatherford.com/weatherford/ ... 079861.pdf

I'm waiting on a callback for pricing....
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 26, 2009 1:04 pm

316 stainless, it's going to be a bit pricey
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Unread postAuthor: daberno123 » Thu Mar 26, 2009 1:07 pm

So... You don't have the means to use it at 10,000 psi or probably even 1,000 psi so it doesn't really matter.

Plus, if they don't post the price, you can almost guarantee that its far above what you can afford.

Sorry to burst your bubble, but to me it just seems unnecessary since your normal QEV rated for 150 psi has been proven to be able to hold much more.

However, if the price is actually affordable (not likely) it would be a cool valve to mod for a high mix piston hybrid.
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Unread postAuthor: jeepkahn » Thu Mar 26, 2009 1:19 pm

I doubt that I'd need one rated that high, don't tell me that the thoughts of a gun based around a small bore with 4000psi hasn't crossed some of your minds.... The chamber could be tiny, and if you're chamber is tiny, then you could still get lotsa shots from a paintball tank....
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Unread postAuthor: sputnick » Thu Mar 26, 2009 1:20 pm

With just a 1/4 inlet and a 1/2 outlet, that is really not a massive QEV, so im guessing with those pressure it could be in the 300-600 range, but i severely doubt above 600$.

Although I somewhat disagree with the way daberno123 put it, I must agree that it far above what you could ever need, that valve could hold back a larda hybrid combustion. (I really have no idea, but I imagine so.)
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Unread postAuthor: jeepkahn » Thu Mar 26, 2009 1:31 pm

ggdt say's,

with a 1.995in3 chamber volume, a 36" .50" barrel, and a 200grain bullet, 994fps and 438.5ft/lb....that's with 4000psi, well within paintball tank range...
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Unread postAuthor: john bunsenburner » Thu Mar 26, 2009 1:41 pm

The only thign i see this valve used for is a gun which uses liquid nitrogen as a propellant( an ETC using liquid nitrogen whcih emidiately boils of and creates huge pressures was my idea) otherwise i also see no practical use for this.
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Unread postAuthor: daberno123 » Thu Mar 26, 2009 1:53 pm

Sorry to put it that way, by all means use it if you can. But seriously you might be better off paying someone to machine you a QEV as the one you're looking at is going to probably cost boat loads. You could probably get a better Cv if you machine your own.
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Unread postAuthor: jeepkahn » Thu Mar 26, 2009 1:57 pm

daberno123 wrote:Sorry to put it that way, by all means use it if you can. But seriously you might be better off paying someone to machine you a QEV as the one you're looking at is going to probably cost boat loads. You could probably get a better Cv if you machine your own.


I was actually considering making my own qevs, now that you mention it... I actually found it by accident when I was looking for a qev that is "inline" in respect to the chamber and barrel, with the pilot being at a 90... I've seen them but can't remember where...
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Unread postAuthor: Brian the brain » Thu Mar 26, 2009 1:57 pm

You will need a rated exhaust valve too, but boy this would be something with helium at those pressures...
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Unread postAuthor: Ragnarok » Thu Mar 26, 2009 2:04 pm

sputnick wrote:that valve could hold back a larda hybrid combustion. (I really have no idea, but I imagine so.)

Peak pressure after ignition in the HyGaC20 with a 200x mix is going to be somewhere between 12,000 and 20,000 psi, probably around the 15,000 mark.

It could probably still take that, but I think going 5,000 psi over a pressure rating is pretty daft...

@jeepkahn: Most paintball tanks have a 450 psi fixed regulator within the neck.

Also, even the higher pressure paintball tanks "only" go to 4500 psi - you wouldn't have much between a 4000 psi operating pressure and the 4500 psi in the tank (even if you could get that raw 4500 out of the tank)

I actually found it by accident when I was looking for a qev that is "inline" in respect to the chamber and barrel, with the pilot being at a 90... I've seen them but can't remember where...

I think you can find them on McMaster....

Hmm, only in 1/8" size though: 6646K31
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Unread postAuthor: jeepkahn » Thu Mar 26, 2009 2:27 pm

[quote="Ragnarok

@jeepkahn: Most paintball tanks have a 450 psi fixed regulator within the neck.

Also, even the higher pressure paintball tanks "only" go to 4500 psi - you wouldn't have much between a 4000 psi operating pressure and the 4500 psi in the tank (even if you could get that raw 4500 out of the tank)

[/quote]

I was more or less throwing it out there as a "this is pretty cool" type thing anyway's...

speaking of pb tanks, what fittings sizes do they typically have??? believe it or not, I've never messed with paintball until I decided to build the ones for the kids...
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Unread postAuthor: D_Hall » Thu Mar 26, 2009 3:08 pm

daberno123 wrote:So... You don't have the means to use it at 10,000 psi or probably even 1,000 psi so it doesn't really matter.

Huh? Go to your local welding supply store and ANYBODY can pick up a tank of 3,000 psi N2 on the spot. If don't mind special ordering, you should be able to get 6,000 psi (I've done it in the past).

Plus, if they don't post the price, you can almost guarantee that its far above what you can afford.

While it *always* means it's expensive, "expensive" is a relative term. I've been shocked in both directions in such scenarios. IE, I've had experiences with "That's IT? Really?"

Sorry to burst your bubble, but to me it just seems unnecessary since your normal QEV rated for 150 psi has been proven to be able to hold much more.

For home use, a QEV that could handle unregulated CO2 would eliminate any desire to play with hybrids. Are you willing to put unregged CO2 into a McMaster QEV?
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Unread postAuthor: ALIHISGREAT » Thu Mar 26, 2009 3:16 pm

@jeepkahn: Most paintball tanks have a 450 psi fixed regulator within the neck.


Most paintball tanks are 850psi with 3000psi or 4500psi in the bottle... there are some 'low pressure' regs that take the pressure to 450 psi though.
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Unread postAuthor: Ragnarok » Thu Mar 26, 2009 3:22 pm

D_Hall wrote:For home use, a QEV that could handle unregulated CO2 would eliminate any desire to play with hybrids. Are you willing to put unregged CO2 into a McMaster QEV?

People most certainly have used unregged CO2 in unmodified 125-150 psi rated QEVs.
I wouldn't, but it has been done.

However, I doubt it would eliminate the desires, because CO2 at any pressure is not going to get you supersonic, and that's a lot of the appeal.

Also, I think the fact the HyGaC20 handles preignition mix pressures approaching four times what unregulated CO2 is capable of shows that there are some people (well, Larda) for whom that really wouldn't please them.

@Ali: Well, I'm not really a paintball person. My mistake then.
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