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sprinkler valve psi

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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sprinkler valve psi

Unread postAuthor: gsdriver » Mon Mar 26, 2007 9:35 pm

im making a pneumatic cannon, first one by the way, and i was wondering how much pressure a 1'' sprinkler valve is capable of holding. i've used all steel pipe and fittings, (thanks mcmaster-carr) which are rated to 3000 psi, so im not worried about that part. the only part of the gun which holds pressure that im not sure about is the valve.

by the way, i dont have the sprinkler valve right now. im using a 1'' ball valve which is temporary until the sprinkler valve gets here. i had to order it from the home depot website because they dont stock them in the store. you know, just in case someone tells me that its in big letters on the side of the box or something.

thanks
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Unread postAuthor: benstern » Mon Mar 26, 2007 9:38 pm

About 120 is the max pressure you should use it at. But why the 3000 psi parts?????
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 26, 2007 9:40 pm

Most sprinkler valves I've seen are rated for up to 10 bar or 150 psi, which is what your average compressor can generate so no worries there.
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Unread postAuthor: hi » Mon Mar 26, 2007 9:40 pm

Well, its not going to hold 3000 psi i can tell you that. I use mine at about 120 with no problem. I might hold 150, but wouldn't recommend more than 130.
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Unread postAuthor: spudthug » Mon Mar 26, 2007 9:44 pm

use pvc for anything below 150 psi...use ur metal fittings and convert them into an over under piston cannon...run it with a small chamber yet 250-300 psi from a pump (bike or stirrup) but since this is your first pneumatic i wouldnt recomend making a piston gun for ur second....iknow alot about pistons but im not making one yet and when i do make my first piston it will be a coaxial....


btw im on my 6th pneumatic and making plans for a seventh that is going to shoot potatoes....surprisingly we all call them potato guns but this is actually the first *pneumatic* potato gun i have made
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: homedepotpro » Mon Mar 26, 2007 10:15 pm

thanks
two questions, would a blow gun work as a pilot for a 1.5 inch chamber

will jb weld bind brass or aluminum well to pvc
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Unread postAuthor: benstern » Mon Mar 26, 2007 10:23 pm

No don't use jb weld. Buy a pvc to metal coupler
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Unread postAuthor: gsdriver » Mon Mar 26, 2007 10:24 pm

all the parts are 3000 psi just because thats the only rating available for the fittings i used. i mean its not like i could actually pump it up to that.
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