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Help if you can

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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Unread postAuthor: s18022 » Sat Oct 28, 2006 3:51 pm

I am building a gun (better refered to as a cannon sinse it is like 15ft long) that i need to get a valve for it, it is a 4inch * 5ft tank and a 2inch *8ft barrel And the hand valve i got doesn't work(no real suprise) but i was wondering if you thought that two sprincler valves would work. so it would break into 2 3/4 inch piches go to the valve and then go back to the barrel.
Thanks for any replies :D
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Unread postAuthor: LucyInTheSky » Sat Oct 28, 2006 4:07 pm

You could use a 3" sprinkler valve
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Unread postAuthor: s18022 » Sat Oct 28, 2006 4:09 pm

Where would you get e 3 inch sprinkler valve cuz if you can i am there.
Thanks
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Unread postAuthor: LucyInTheSky » Sat Oct 28, 2006 4:11 pm

Dont know were you get them, im from the uk so i dont use them but that BIG NASTY gun has 2 of them on.
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Unread postAuthor: squeaks » Sat Oct 28, 2006 6:08 pm

ok, first of all, 3 inch sprinkler valves cost upwards of $400. Second, even 2 1" sprinklers would have constriction on your air flow. It's all about surface are of a circle, r^2pi. a 2 1" valves would have the surface area equivelant of 1/2 pi. A 2" valve would have the surface are of pi. So, what I'm suggesting is pay $120 for a 2 inch sprinkler, buy a supah/mauler valve, or make your own piston/diaphram valve.
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Unread postAuthor: Velocity » Sat Oct 28, 2006 6:31 pm

squeaks wrote:ok, first of all, 3 inch sprinkler valves cost upwards of $400. Second, even 2 1" sprinklers would have constriction on your air flow. It's all about surface are of a circle, r^2pi. a 2 1" valves would have the surface area equivelant of 1/2 pi. A 2" valve would have the surface are of pi. So, what I'm suggesting is pay $120 for a 2 inch sprinkler, buy a supah/mauler valve, or make your own piston/diaphram valve.


<a href="http://www.sprinkler.com/buy/item/irritrol_c_valves_3/3110">Upwards of $400? I think not</a>
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Unread postAuthor: c19o » Mon Dec 25, 2006 10:57 pm

make a piston valve
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