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CO2 regulation with a ball valve.

Posted: Mon Oct 16, 2006 7:26 pm
by THEMOST
Would it work if I got a fancy metal ball valve and placed it between an air chamber and a CO2 tank and tried to slowly open it to regulate the amount of air that goes into chamber manually???????

Posted: Mon Oct 16, 2006 7:38 pm
by tntlly
i have a one inch ball valve laying around and it says not more than 600 psi on it, and co2 is like 800....

also, before i even saw the rating i tried that and even if you have a good seal on the threads, the co2 finds a way out when you have the valve closed

Posted: Tue Oct 17, 2006 3:41 am
by Brian the brain
If you have the material to withstand 900 psi you could make a meterpipe.
Open one ballvalve, fill a precalculated volume, close the ballvalve.Then open another ballvalve wich leads to the chamber.....

the concept is simple...finding the material however is not..

Posted: Tue Oct 17, 2006 5:41 am
by mark.f
McMaster! They have all the stuff to make the thing you describe.

I would just need a welder and I'd be set.

Posted: Tue Oct 17, 2006 11:56 am
by KVINCEO
if your useing a paintball co2 tank.. ball valves work. i think there might be a type of reg in the tanks valve tho. but dont attemp to reg it. just use a steel chamber. and because its at a higher psi, you can have a smaller chamber. i might be off, maybe paintball co2 tanks have a lesser psi than the big filler tanks. but i use em all the time on my cannons unregulated

Posted: Wed Oct 18, 2006 3:35 pm
by THEMOST
If you dont regulate it wouldnt the thing soot with 800psi?? That's lethal with a paintball and I want to play with friends. I could understand it if there was a small air pressure tank (which you said), but my solenoid valve still couldnt handle over 140psi of wind blast. I think that that one idea of having a steel precalculated volume chamber with ball valves on bothsides would work.

Brian the brain, could you tell me what porportions I would need to fill a 1' long, 2"pvc pipe with 80 psi?? :P That would be freaking sweet if you could tell me that so I dont have to keep trying different sizes of iron pipe.
A 800-1000psi CO2 tank is waht Id use.

Posted: Wed Oct 18, 2006 4:30 pm
by tntlly
co2 is cold, it makes pvc brittle. you can buy one foot sections of threaded metal pipe at home depot

Posted: Wed Oct 18, 2006 5:00 pm
by THEMOST
...oooo...that's not good. How bad is the cooling effect? Could it withstand 100psi?

Posted: Wed Oct 18, 2006 6:10 pm
by tntlly
i don't know, i haven't done co2 with pvc because all i've heard about it was bad, im sure you could get away with it a few times but each time your pvc would be more likely to blow. if you want co2 just do something like this.
<a href="http://biketiresdirect.com/productdetai ... 33">here's a link to the bike tire inflators</a> you can buy them just about anywhere

edit: oops forgot the link to the post mentioned below <a href="http://www.spudfiles.com/forums/viewtopic.php?t=244"> here it is</a>

Posted: Wed Oct 18, 2006 6:31 pm
by judgment_arms
Correct me if I’m wrong but, if you could fill bike tires would it not also be reasonable to assume that you could fill an air-cannon to a reasonable presure?

Posted: Wed Oct 18, 2006 6:35 pm
by tntlly
yeah, but if you have a large chamber your 800 psi thats in the little cartridge expands a lot so it's not 800 psi anymore, the same idea as the way a big tank takes longer than a tiny one to fill to, let's say, 60 psi with a pump. the post about the barrel sizes expalins it as well

Posted: Wed Oct 18, 2006 8:13 pm
by THEMOST
...this really sucks... I've got all the parts and there all measured out and metal pipe could not work with the barrel inside the chamber... :evil: :x :( Is it really that hard on the pvc? Do you know what the actual temperature is because I know that pvc is used outside in the winter for stuff...but its probably not pressurized then either is it... :cry:

Posted: Wed Oct 18, 2006 8:26 pm
by CS
Im tired of seeing that f*cking face with the camera...

Anyway, as I understand it to be the reason a ball valve is not used in such system is there is a chance that the exiting gases when exiting will in some cases 'freeze' your valve open. Id condemn the procedure a bit risky.

Might look like <a href="http://www.cartoonstock.com/newscartoon ... g">this</a> eh?

Posted: Wed Oct 18, 2006 8:33 pm
by THEMOST
...dont CO2 tanks have flow regulators. I would think that having that would prevent freezing.

Get used to my face I was going to change it but ya know...I dont think I will now. :lol:

Posted: Thu Oct 19, 2006 7:59 pm
by sv490665
What i wanna know is what psi a typical paintball CO2 tank is charged to. I have a 9oz paintball tank and a 16oz paintball tank and i wanna know what pressure they're at on a fresh charge... anyone know?