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HELP!!!!

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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HELP!!!!

Unread postAuthor: M3NT4L » Tue Aug 29, 2006 11:19 pm

I suck completely at tryng to make a piston valve con someboday help me by posting a diagram instructions or something ive looked all over and i cant fing anything very helpfull. I am making a galvanized steel "T" style cannon and i need help making a piston valve inside the t ventilated by a blogun/ballvalve. Thanks
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Unread postAuthor: Velocity » Tue Aug 29, 2006 11:24 pm

<a href="http://www.spudfiles.com/uploader/uploadFiles/Wholevalve23423.JPG">1</a>
<a href="http://www.spudfiles.com/uploader/uploadFiles/Body23423.JPG">2</a>
<a href="http://www.spudfiles.com/uploader/uploadFiles/PistonSeal43234.JPG">3</a>
<a href="http://www.spudfiles.com/uploader/uploadFiles/PistonSealX23423.JPG">4</a>

I don't have any diagrams, but these are some pictures of a finished one.
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Unread postAuthor: M3NT4L » Tue Aug 29, 2006 11:57 pm

Thanks, but i need to know what to use for a good seal (material) and if it HAS to be filled from behind the piston.
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Unread postAuthor: MrCrowley » Wed Aug 30, 2006 12:07 am

yes has to behind the piston to make it move foward look here:http://forums.spudtech.com/topic.asp?TOPIC_ID=13265&whichpage=1
use neoprene has a really good seal
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Unread postAuthor: Velocity » Wed Aug 30, 2006 12:10 am

M3NT4L wrote:Thanks, but i need to know what to use for a good seal (material) and if it HAS to be filled from behind the piston.


no it does not. If you use a spring, you can fill from the chamber. However, for simplicity's sake, as well as sealing issues, I would reccommend that you fill from behind it.

For a sealing face, I use 1/8" neoprene off of mcmaster.
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Unread postAuthor: MrCrowley » Sat Sep 02, 2006 2:55 am

oh yeah true forgot about that but it does have to exhaust from behind doesnt it? :roll:
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