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Building a piston valve, need 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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Building a piston valve, need help.

Unread postAuthor: iPaintball » Fri May 11, 2007 3:02 pm

I'm building barrel-sealing piston valve, and I have two questions...

1) Is there any size endcap that will fit into a 1"-1.5" tee?
2) What's the best way to grind down the PVC step inside the tee?
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Unread postAuthor: spudthug » Fri May 11, 2007 3:24 pm

why would u grind out the tee? all u do is grind out teh bushing...

as for ur piston try different couplers and then when u find a coupler that fits find an endcap that fits inside the coupler.. that should make a good piston
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: iPaintball » Fri May 11, 2007 4:57 pm

I'm not making a coax, that's why
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Unread postAuthor: pyromaniac » Fri May 11, 2007 5:02 pm

You grind down the barrel so you piston has less space to move.
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Unread postAuthor: rna_duelers » Fri May 11, 2007 6:39 pm

Use a lathe if you could but most people don't have one lying around.Dremel is your next bets friend but go easy on it,as you can fuk a good Tee quickly with rough play with a Dremel.

Ohh and a little time with some fine sand paper for the finer work.

And I believe he is making a piston valve housed in a Tee.
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Re: Building a piston valve, need help.

Unread postAuthor: iPaintball » Fri May 11, 2007 7:10 pm

1) Is there any size endcap that will fit into a 1"-1.5" tee?
2) What's the best way to grind down the PVC step inside the tee?
Yeah, I beleive i said the word "tee" 2 times...

What about my first question?
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Unread postAuthor: jrrdw » Fri May 11, 2007 7:20 pm

Off Topic -- Is your Avatar a Crack The Sky album cover? And if so, whats it called?
About your piston, i've read around here about useing Plexi-glass rod??? Seems suitable for what your doing, being that it's 1"-1 1/2" diameter.
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Unread postAuthor: iPaintball » Fri May 11, 2007 7:24 pm

No, my avatar is a CKY album.

the reason I asked for endcaps is because I really don't want to have to order or custom make anything
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Unread postAuthor: Panzerfaust » Sun May 13, 2007 4:22 pm

If your really set on using normal standard stuff, id say to make your valve in a 2" tee. I just made a coaxial piston in 2" pipe with a 1.25" endcap piston and it works very well. i plan to make a tee version soon. 1.25" endcaps are avaliable at lowes, fit very very well into 2" pipe, and i just bolted a rubber washer on the endcap and it and got a perfect seal.
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Unread postAuthor: super spuder » Sun May 13, 2007 8:17 pm

you could make one out of hot glue. it would take alot of hot glue thou.
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trying to decide on a new project, probably something small.
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Unread postAuthor: goose_man » Mon May 14, 2007 9:04 am

Um, a 3/4" endcap fits well in a 1.25" pipe.
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