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Co2 Push Valve


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#1 Namm

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Posted 19 April 2006 - 09:23 PM

I really dont know when I'll get around to it, but I do plan on making a home made nerf gun. You know..eventually. Anyways, I want to use co2, but I dont know what type of valve to use. Paintball valves (I think, I'm not 100% sure) use a hammer to hit a valve, which opens and closes, but because of the way its placed in the gun (In the bolt, or behind it...I dont actually own a paintball gun) It would be hard to take out and use for a home made. I dont need an electronicly operated valve, just something were you push a button, or part, and it opens. Even better, you push a part, and it snaps open and then closed quickly. If I could use a pvc valve I would, but co2 is very cold, and much too high a pressure for pvc. I dont want to have to do a lot of work to make the valve functional, like boltsniper did with his BASR, and the brass eagle valve. If anyone knows of a solution, or where I could cannablize a valve from, that would be great.
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#2 GeneralPrimevil

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Posted 21 April 2006 - 02:47 PM

Meh, I feel like responding to this.

First off, the pressure of CO2 when it finally gets to the bolt is much less than the pressure direct from the tank. I mean, less than 500psi. Wanna know what that 'velocity adjust knob' really is? Part of a regulator. It is a flow regulator (usually), but still a regulator none-the-less.

Now, on to why I wanted to post:
Hammer valves, fun stuff...
Piston valves: even better. Try and either make a manually-operated (much like the valve in an AT3k or the like) one, or use something pneumatic. I still need to try my hand at a manually-actuated piston valve, just because I have shit-luck with pneumatic-actuation, or lack of actuation really...

What is this for? Do I want to know? Should anyone here know?

Take a valve from, oh, I dunno, if you don't care about flow, a pressure washer handle. Let's just say that 4500psi with maximum temperature of over 300F and minimum of less than -100F (or so I have heard...) is okay for CO2, but even still, the limited flow removes any real 'cool-down' effect of the carbonated dioxygen. That and regulators are mandatory for repeatable results in the ways of performance. Price does not matter when maximums of such gasses are used. You get what you pay for.
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"Fear the man with one gun, for he probably knows how to use it."

#3 Namm

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Posted 22 April 2006 - 12:33 AM

I plan on using a regulator, I forgot to mention that. This valve would be for a homemade nerfgun, and as such, I do care about the flow. I thought about making a valve, but this would be finicky, and I was hoping there would be an easier solution, such as buying an already made valve. Because I'm using a regulator, I probably only need the valve to be good up to 200 psi, Its the temperature I'm afraid of, and the repeat use of co2 with plastics such as pvc. If anyone knows of a valve I could use, off the shelf, or something that would require minor tweaking, that would be great. I would really rather not attempt to build a valve.

Edited by Namm, 22 April 2006 - 12:35 AM.

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