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Metal Pipe

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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Metal Pipe

Unread postAuthor: pretzelperson » Sat Sep 22, 2007 1:44 pm

It has been suggested that I make a piston valve for my new pneumatic spud gun. (I posted pictures of it last week). I want to make the piston valve from steel pipe. Most of the examples I have seen here use PVC fittings to make the valve housing. Has anybody made one out of steel pipe and would you be willing to share with me any suggestions as to how best to make this valve?
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Unread postAuthor: frankrede » Sat Sep 22, 2007 1:54 pm

They have been made.
They, in my opinion are harder to do in threaded pipe.(unless its a coaxial
but I hear copper is the best to work with when it comes to pistons.
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Unread postAuthor: Fnord » Sat Sep 22, 2007 2:15 pm

I have a couple laying around. Here is how they are made.
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valve.GIF
A 2" end cap is placed on the back. The piston is made from whatever you can find.
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Unread postAuthor: windshrike » Sat Sep 22, 2007 2:16 pm

Yeah, use copper, unless you can obain stainless steel pipe. Galvanized steel pipe is really rough on the inside, and that would affect a pistons ability to seal and it might damage the seals when the piston moves.
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Unread postAuthor: pretzelperson » Sun Sep 23, 2007 6:56 am

_Fnord wrote:I have a couple laying around. Here is how they are made.


Thankes. Exactly what I was looking for.
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