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How Do You Make A Piston 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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How Do You Make A Piston Valve?

Unread postAuthor: someguy314 » Mon Jun 07, 2010 5:03 pm

I was wondering how would you make the piston for the piston valve? Like is there like a part I can find at like a hardware store?

btw this is my first post on Spudfiles! :)
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Unread postAuthor: jrrdw » Mon Jun 07, 2010 5:09 pm

Welcome to Spudfiles.

Please use the Wiki to search for answers and the disscusion and showcase sections as well. Search "piston valves" for starters.
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Unread postAuthor: Marffy » Mon Jun 07, 2010 5:24 pm

What kind of piston valve do you wanna make? how big do you wanna make it?
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Unread postAuthor: someguy314 » Mon Jun 07, 2010 5:33 pm

Marffy wrote:What kind of piston valve do you wanna make? how big do you wanna make it?


Well I was thinking about making a chamber sealing tee valve. And the size. I don't want it to be really big just something small that won't be really expensive.

I did what jrrdw told me and thought about using just a end cap with a hole in the middle.
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Unread postAuthor: Gun Freak » Mon Jun 07, 2010 5:58 pm

Don't start with a chamber sealer, do a barrel sealer first, they are MUCH easier to make. Look around in the showcase and you can find many examples, my Superna for example.
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Unread postAuthor: someguy314 » Mon Jun 07, 2010 6:03 pm

Gun Freak wrote:Don't start with a chamber sealer, do a barrel sealer first, they are MUCH easier to make. Look around in the showcase and you can find many examples, my Superna for example.


Awsome will do. Thanks!
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Unread postAuthor: Technician1002 » Mon Jun 07, 2010 7:32 pm

In my Mouse Musket thread, see my sig, I show how to build a small piston on a drill press using cutting board plastic. The thread covers a coaxial design and not a valve in a T, but the piston technique can be used in a T for smaller pistons. The largest I made this way is 2 inch.

Scroll down the page to my second post that covers making a replacement piston to fit this cannon.
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Last edited by Technician1002 on Mon Jun 07, 2010 8:25 pm, edited 1 time in total.
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Unread postAuthor: Gun Freak » Mon Jun 07, 2010 7:45 pm

If I were you, I would go with a coaxial design, they are very simple to make and require the least parts of any piston valve.
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Unread postAuthor: someguy314 » Tue Jun 08, 2010 7:17 am

cool will do
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Unread postAuthor: boyntonstu » Tue Jun 08, 2010 7:25 am

someguy314 wrote:cool will do


3/4" Oak dowel and 2 "O" rings and a 1/2" faucet washer gets me 1,000 fps at 600 psi in the Trom-Boyn.

That should be easy enough for you and all parts are store bought.
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Unread postAuthor: someguy314 » Tue Jun 08, 2010 8:06 am

boyntonstu wrote:
someguy314 wrote:cool will do


3/4" Oak dowel and 2 "O" rings and a 1/2" faucet washer gets me 1,000 fps at 600 psi in the Trom-Boyn.

That should be easy enough for you and all parts are store bought.


Sweet I'll try it!
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Unread postAuthor: jackssmirkingrevenge » Tue Jun 08, 2010 11:27 am

You might want to experience the joys of epoxy casting ;)
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Unread postAuthor: someguy314 » Tue Jun 08, 2010 11:37 am

jackssmirkingrevenge wrote:You might want to experience the joys of epoxy casting ;)


Hmm I'll have to think about all these options. But still keep them coming!
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Unread postAuthor: clemsonguy1125 » Tue Jun 08, 2010 8:01 pm

http://www.instructables.com/id/Golfbal ... That-Shoo/
Heres a 2 inch one, might be a bit larger than what you want but it could be scaled down
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Unread postAuthor: someguy314 » Tue Jun 08, 2010 8:56 pm

clemsonguy1125 wrote:http://www.instructables.com/id/GolfballAntennaNerf-Cannon---Build-One-That-Shoo/
Heres a 2 inch one, might be a bit larger than what you want but it could be scaled down


Awsome I'll probably do that one! Thanks!
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