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Helps on 2" porting 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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Helps on 2" porting piston valve

Unread postAuthor: jmeyer1022 » Tue Mar 24, 2009 10:32 am

So far I've been trying to come up with a 2" tee with 2" porting without using an adapter on the outlet side, but so far that's the only way I can think of.
It's simply 2" sch 80 pipe into the lip of the tee, then 1 1/2 pipe sleeved/glued into that until the middle of of the tee. then with a little bit of the sch 80 sticking out a 2" adapter glued onto that.
Diagram:
Black= 2" tee
Red= Sch 80 2" pipe
Blue: 1 1/2" pipe sleeved/glued into sch 80
Light Blue: Slipx FIPT 2" adapter

Image

This seems like a good idea, but I want to try an house it all in a tee, I'll probably have to move up to a 2.5" tee.
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Unread postAuthor: jrrdw » Tue Mar 24, 2009 12:59 pm

I'm affaid I don't understand your question.
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Unread postAuthor: Carlman » Tue Mar 24, 2009 1:07 pm

If you do that mate youve got 1.5" porting still just with 2" threads
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Unread postAuthor: MrCrowley » Tue Mar 24, 2009 2:32 pm

As carlman said, that only gives you 2" threads, not a 2" (nominal diameter) port that the piston valve seals against...which can't be done in a 2" tee.

What you've done is similar to what I did here:
http://www.spudfiles.com/forums/viewtop ... tml#186844
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Unread postAuthor: jmeyer1022 » Tue Mar 24, 2009 6:37 pm

Ok, We'll looking for 2" threads, prefer port to be around 1.5", is there a way I can go about doing this while keeping it in the tee.
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Unread postAuthor: mark.f » Tue Mar 24, 2009 7:41 pm

There's really no practical way other than somehow getting it all to work in a threaded tee. If you were to get a larger tee, then there's really no reason not to use larger porting as well...

I say use a modified version of your original plan and don't worry about the little extra length. Simply use two 2" x 1-1/2" bushings in place of the 2" SCH-80, and then modify the back on so that 1-1/2" pipe slides through it.
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