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pneumatic help

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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pneumatic help

Unread postAuthor: Mike_Hunt0420 » Mon May 11, 2009 6:37 pm

I am working on an 800 psi repeater. i'll be using co2, I found an 800 psi regulator, and need help designing a piston valve and triggering mechanism that can handle the power.
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Unread postAuthor: jmccalip » Mon May 11, 2009 6:38 pm

Seamless stainless steel fittings? Lots of $$$$$ though.
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Unread postAuthor: inonickname » Mon May 11, 2009 6:47 pm

CO2 is not even that much above 800 psi..unless it's very hot.

So far I haven't seen much in your posts that suggest you're up to this..

Malleable iron, copper (depends on size), steel, galvanized..

For a trigger mech a hammer valve porting a machined teflon piston.
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Unread postAuthor: far_cry » Mon May 11, 2009 6:53 pm

inonickname wrote:CO2 is not even that much above 800 psi..unless it's very hot.

So far I haven't seen much in your posts that suggest you're up to this..

Malleable iron, copper (depends on size), steel, galvanized..

For a trigger mech a hammer valve porting a machined teflon piston.


this is your answer mike_hunt ,
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Unread postAuthor: Mike_Hunt0420 » Mon May 11, 2009 8:08 pm

I'm running co2 commercial steel tank, 2000-3000 psi lol. thank for the info, it will help greatly.
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Unread postAuthor: jmccalip » Mon May 11, 2009 8:13 pm

Mike_Hunt0420 wrote:I'm running co2 commercial steel tank, 2000-3000 psi lol. thank for the info, it will help greatly.



High pressures aren't that funny. Don't blow yourself up now.
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Unread postAuthor: brplatz » Mon May 11, 2009 8:47 pm

I vote copper :D
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Unread postAuthor: MountainousDew » Mon May 11, 2009 9:05 pm

I vote steel, because if the regulator, for any reason would fail, the gun wouldn't blow up & kill you and/or other people. When you are dealing with that high of pressures, safety should always come first...

For your valve question, look at B the B's Mr. Porter... The link is below. And to trigger the piston valve, a hammer valve would be great for something like this.
http://www.spudfiles.com/forums/mr-port ... 17312.html

What are you planning on shooting, anyways?
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Unread postAuthor: psycix » Tue May 12, 2009 1:01 pm

Look at BTB's T-bolt design. It uses a hammer valve in combination with a QEV to let out just a bit of air every shot, making it a repeater.
A good QEV can probably handle 800 psi, especially if you machine your own piston for it.
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Unread postAuthor: Mike_Hunt0420 » Tue May 12, 2009 4:36 pm

I had planned on steel construction, I want a powerful toy not an early grave lol. I have total safety in mind, all the regulators and everything else I will need are already on order and I should have the cannon finished in a week or two.
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Unread postAuthor: Mike_Hunt0420 » Tue May 12, 2009 5:07 pm

Oh, and as for ammo I was thinking some custom made lead or iron slugs. lol
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Unread postAuthor: Solar » Tue May 12, 2009 9:20 pm

Mike... you wouldn't happen to live in Seattle would you? I remember the Mike Hunt public access show... 420... understatement....
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Unread postAuthor: Technician1002 » Tue May 12, 2009 10:49 pm

Solar wrote:Mike... you wouldn't happen to live in Seattle would you? I remember the Mike Hunt public access show... 420... understatement....


I doubt the name is real. If you saw some of the juvinile pranks in movies like Porkeys, you will realise the name is most likely a prank just to see who you can get to say it over and over until they are embarrased.
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Unread postAuthor: Mike_Hunt0420 » Wed May 13, 2009 1:53 am

I do not live in seatle and I really wish people would lay off the name. i'll drop the 0420 if it is offensive but otherwise get off my name, it is mine and I happen to enjoy the irony that comes with it. thank you.
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Unread postAuthor: inonickname » Wed May 13, 2009 4:32 am

Lol, if that's actually your name then fair enough.

By the way, good luck getting 3000 psi from CO2. Unless under certain conditions pertaining to temperature it would liquefy before that. And thus, the vapor pressure would be lower.
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