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Butterfly 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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Butterfly valve?

Unread postAuthor: tomthebomb137 » Thu Feb 28, 2008 5:17 pm

im just curious to see if anyone has sucsessfully used a butterfly valve in a pnuematic cannon, andif you have im wondering how you rigged it up
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Unread postAuthor: SpudFarm » Thu Feb 28, 2008 5:22 pm

mythbusers used it on the chicken gun :)
and it is a pumpkin cannon on here using a springloded butterfy:) (to lazy to find)
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Unread postAuthor: tomthebomb137 » Thu Feb 28, 2008 5:46 pm

yah, iv been looking at them but there not threaded or slip, so im try to figure how to mount one , they are like these bolt on things haha sorry for the bad discription
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Unread postAuthor: SpudFarm » Thu Feb 28, 2008 5:50 pm

i know what you mean.
if you are good to weld and makeing a steel gun you can use a pipe and a plate then cut a piece out of the plate the same diameter as your pipe then you weld the plate on the outside of your "output" and weld it on!

make some holes for the bolts and there you go :)

sorry bad english and stuff "it is night hear"
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Unread postAuthor: tomthebomb137 » Thu Feb 28, 2008 5:52 pm

In other words does anyone know how to mount this fitting to a PVC chamber and barrel?
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"Once the pin is pulled, Mr. grenade is no longer our friend"

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Unread postAuthor: SpudFarm » Thu Feb 28, 2008 5:58 pm

i don't know if it is possible
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Unread postAuthor: pizlo » Thu Feb 28, 2008 6:14 pm

Nah no way without welding. just buy a sprinkler or make a piston.
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Unread postAuthor: DYI » Thu Feb 28, 2008 6:21 pm

With some basic plumbing knowledge, this question can easily be answered, and the answer is yes.

That butterfly valve of yours mounts on a 3" flange, which is a premade, commonly available version of what spudfarm was trying to describe. All you need to do is get a 3" iron/steel flange with threaded connections, and the right bolt circle diameter to connect it with. Then you just tighten the appropriate size of bolts through the holes on the flanges on each side, and screw that onto the PVC threads.
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Unread postAuthor: pizlo » Thu Feb 28, 2008 6:23 pm

DYI wrote:With some basic plumbing knowledge, this question can easily be answered, and the answer is yes.

That butterfly valve of yours mounts on a 3" flange, which is a premade, commonly available version of what spudfarm was trying to describe. All you need to do is get a 3" iron/steel flange with threaded connections, and the right bolt circle diameter to connect it with. Then you just tighten the appropriate size of bolts through the holes on the flanges on each side, and screw that onto the PVC threads.

Well I just got owned...
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Unread postAuthor: Carlman » Thu Feb 28, 2008 11:18 pm

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Unread postAuthor: SpudFarm » Fri Feb 29, 2008 12:19 pm

carlman that was the gun i thinked of :)
BUT it is steel i think
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Unread postAuthor: clide » Sat Mar 01, 2008 12:57 am

DYI wrote:All you need to do is get a 3" iron/steel flange with threaded connections, and the right bolt circle diameter to connect it with. Then you just tighten the appropriate size of bolts through the holes on the flanges on each side, and screw that onto the PVC threads.


They also make PVC flanges that could be directly solvent welded to the chamber.
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Unread postAuthor: DYI » Sat Mar 01, 2008 1:02 am

I think that the steel bolts and knuts might wear on the PVC over time, and considering how cheap the flanges would be, I personally don't think it's worth the risk.
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