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2" Piston How-To

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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2" Piston How-To

Unread postAuthor: Hubb » Thu Aug 27, 2009 6:00 pm

While I am aware that there have been many launchers to use a 2" barrel sealing piston valve, and I am also aware that the most commonly used method to do so is to use a 1 1/4" coupling, I have yet to find a how-to on doing so.

Since this is one of the most commonly built types of valves on Spudfiles, I figured I would go ahead and put together a how-to on building one. This particular piston has a simple built-in check valve and o-ring, has a "soft seal" face, and can be constructed using common tools by nearly anyone.

I personally, have built several of these particular pistons and have never had any bad luck with any of them.

Enjoy.

2" Piston How To
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Last edited by Hubb on Tue Sep 08, 2009 3:40 pm, edited 1 time in total.
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Unread postAuthor: jor2daje » Thu Aug 27, 2009 6:16 pm

Great how to, I love the piston design, I think I'm gonna build one and put it in my 2" valve. Thanks!
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Unread postAuthor: FORE!!!! » Thu Aug 27, 2009 6:18 pm

COOL how to, i love the idea of a check valve in side the piston ,its news to me :)
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: Hubb » Tue Sep 08, 2009 3:43 pm

I've added a little more detail and some more techniques into this book.

I haven't built one of these in a while and I pulled it out to double-check everything over the weekend. The new o-ring size (3/16") has been changed. Sorry for any inconveniences.
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