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Paintball Cannon 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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Paintball Cannon Help

Unread postAuthor: Miles Hardman » Mon Dec 19, 2011 1:07 pm

Hello,
Out of a strange turn of events I have my hands on an unregulated paintball tank and a 3000/4500psi air compressor. I was wishing to create a 0>500(?) psi cannon out of this as I think 4500psi would be a very bad Idea (you tell me). My problem is I do not know the size of the threads on the paintball tank accurately and I was wondering if anyone knew, and any places I can get some pipes to fit the size. Also, can someone give me some ideas of what I can do to utilise this massive power?
(Oh and Hi, Im Miles)
Thanks.
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Unread postAuthor: ramses » Mon Dec 19, 2011 1:14 pm

Paintball tanks typically have an internal regulator to either 900 or 450 PSI. Attached to this is the fill nipple, which is a quick connect with check valve that leads to the tank before the regulator.

If your tank does not have a regulator, I suggest you simply buy a new tank, or install a regulator like this one and have the bottle re hydro-tested.

You then have a safer output pressure with standard ASA threads that can be adapted to "normal" 1/8" threads with any number of cheap adapters..


An inline regulatorwill let you adjust final pressure after all that.
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Unread postAuthor: Miles Hardman » Mon Dec 19, 2011 1:19 pm

Thanks for the help!
But just out of curiosity what is the paintball tank thread size, I wanted to see if I could find another way around it, with a ball valve or something.
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Unread postAuthor: mark.f » Mon Dec 19, 2011 3:23 pm

The thread size for a paintball tank valve's outlet is CGA 320... ramses idea would be the best route.
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Unread postAuthor: Lockednloaded » Mon Dec 19, 2011 7:15 pm

If you're interested in regulating down your pressure, I have built a gun that operates at up to 700psi, is very compact, and tennis ball bore. It'd make an excellent grenade launcher for paintball
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Unread postAuthor: Miles Hardman » Mon Dec 19, 2011 7:19 pm

Can I ask what would happen If I were to launch something at 4500psi?
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Unread postAuthor: warhead052 » Mon Dec 19, 2011 7:46 pm

If you were to launch a paintball at that pressure, it would probably pop before it even left the barrel.
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Unread postAuthor: Miles Hardman » Mon Dec 19, 2011 7:48 pm

I was talking about a ball bearing, By paintball in the title I meant that I was using a paintball tank not that I am actually using paintballs.
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Unread postAuthor: warhead052 » Mon Dec 19, 2011 7:53 pm

Ah ok. Well a ball bearing would possibly break the sound barrier, depending on the weight and size of it.
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Unread postAuthor: Miles Hardman » Mon Dec 19, 2011 7:55 pm

Sounds fun, I have been looking around but I cannot find the sufficient tubing/piping anyway :/.
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Unread postAuthor: Gippeto » Mon Dec 19, 2011 10:22 pm

Miles Hardman wrote:Can I ask what would happen If I were to launch something at 4500psi?


If you were fully prepared .... great and awesome things. 8)

If you were NOT fully prepared...tragic and possibly terminal things. :shock:
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Unread postAuthor: Miles Hardman » Mon Dec 19, 2011 10:24 pm

Yup, I attempted this once before, could not get the right equipment. I made a 'bomb squad' suit out of layers of clothing and some steel sheets just incase, was all rather crude.
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Unread postAuthor: Gippeto » Mon Dec 19, 2011 10:37 pm

Not to be a killjoy, but anything at 4500psi with volume behind it is quite capable of LITERALLY removing limbs/digits or even cutting you completely in two.

Far better to contain it properly or simply do something else than put false hope in something like you describe.
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Unread postAuthor: Miles Hardman » Mon Dec 19, 2011 10:53 pm

I suppose... Say, how much force is required to push a man off the ground?
Heh, that would end badly.
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Unread postAuthor: velocity3x » Mon Dec 19, 2011 11:11 pm

High pressure can get extremely rude if you aren't capable of containing and controlling it. Don't play with it if you're not capable.
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