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need a valve

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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need a valve

Unread postAuthor: F.E.A.R._Sniper » Tue Aug 05, 2008 10:59 am

ok, so here is the deal. I am working on a portable spud gun that is chambered in .68 caliber. I have everything built and this bad boy is ready to rock except for one very big detail, it needs a valve.

this is where i was hoping you guys could come in and help me. I need a valve that would be very easy to attach to a piece of pvc pipe that has 1" ID.
any ideas gentlemen?
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Unread postAuthor: daberno123 » Tue Aug 05, 2008 11:02 am

1" modded sprinkler valve. Nice easy and simply with plenty of power for a .68 caliber
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Unread postAuthor: willarddaniels » Tue Aug 05, 2008 11:02 am

Use a ball valve, that is simple enough. It would be even better with a sprinkler valve or QEV. Research it.
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Unread postAuthor: F.E.A.R._Sniper » Tue Aug 05, 2008 11:04 am

i have looked into ball valves, they are far to difficult to open to be practical for my situational needs. i had also thought of the sprinkler valve but the cost is a down fall and never even thought of a QEV
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Unread postAuthor: noob of noobs » Tue Aug 05, 2008 11:24 am

I'd recomend you build yourself a piston valve. They're strong, easy to open, and are the most bang for your buck.
I'd also recomend you research :wink:
Here's a great starting point:
http://www.spudfiles.com/spud_wiki/index.php?title=Main_Page
Have Fun!
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Unread postAuthor: Hubb » Tue Aug 05, 2008 12:04 pm

A sprinkler valve is going to be your best option for your paintball, er, potato gun. Save the money and go that route.

If you want to try your hand at a piston, you can, but I just sugget the sprinkler.
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Unread postAuthor: brogdenlaxmiddie » Tue Aug 05, 2008 12:18 pm

I recommend a sprinkler. I personally am more than capable of making a piston vavle but haven't really wanted to build one and I find that sprinkler valves are quite good. One thing I do recommend however is that if you do use a sprinkler valve, make the nipples going into the valve steel. I find that the place sprinkler valve guns break the most is there. Its also a PITA to try and get the threads back out. So just use something like a PVC female threaded (chamber size) to 1" bushing -- 1" steel male-male nipple -- sprinkler valve-- Steel nipple -- barrel (same configuration as the chamber but the size of your barrel)
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Unread postAuthor: frankrede » Tue Aug 05, 2008 4:01 pm

brogdenlaxmiddie wrote:I recommend a sprinkler. I personally am more than capable of making a piston vavle but haven't really wanted to build one and I find that sprinkler valves are quite good. One thing I do recommend however is that if you do use a sprinkler valve, make the nipples going into the valve steel. I find that the place sprinkler valve guns break the most is there. Its also a PITA to try and get the threads back out. So just use something like a PVC female threaded (chamber size) to 1" bushing -- 1" steel male-male nipple -- sprinkler valve-- Steel nipple -- barrel (same configuration as the chamber but the size of your barrel)
That is usually the case when you have an over under connection with an unsupported barrel. Other than that I have never had that happen, and one shouldn't expect it too, especially with a small barrel
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Unread postAuthor: brogdenlaxmiddie » Tue Aug 05, 2008 4:10 pm

frankrede wrote:
brogdenlaxmiddie wrote:I recommend a sprinkler. I personally am more than capable of making a piston vavle but haven't really wanted to build one and I find that sprinkler valves are quite good. One thing I do recommend however is that if you do use a sprinkler valve, make the nipples going into the valve steel. I find that the place sprinkler valve guns break the most is there. Its also a PITA to try and get the threads back out. So just use something like a PVC female threaded (chamber size) to 1" bushing -- 1" steel male-male nipple -- sprinkler valve-- Steel nipple -- barrel (same configuration as the chamber but the size of your barrel)
That is usually the case when you have an over under connection with an unsupported barrel. Other than that I have never had that happen, and one shouldn't expect it too, especially with a small barrel


I have actually had it happen twice with an inline and a 1" bore barrel.
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Unread postAuthor: jrrdw » Tue Aug 05, 2008 4:37 pm

Your options are wide open. Would like to see pictures of it, before suggesting a valve.
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