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2 inch piston valve housing?

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 inch piston valve housing?

Unread postAuthor: BeaverRat » Mon May 31, 2010 9:22 pm

Hello,

I successfully built the Hubb 2 inch piston, but I really don't know how to do any of the valve housing. I know that the piston rides in 2 inch pipe in a tee, but other than that, I don't know what fittings to use. I would like to be able to have access to the piston (not have it permanently closed) after it is built for service and such. I will be using a 1.5 inch barrel and a 1 inch sprinkler valve. I want to have some sort of bumper too so the piston doesn't break. Are there instructions anywhere that show how to build the valve housing?

Thanks
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Unread postAuthor: clemsonguy1125 » Mon May 31, 2010 9:33 pm

Yeah there are, mrc has instructions in the howto section, in the future you may want to search, some people get mad over that, the search is a little tricky but thes a howto on that too
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Unread postAuthor: jor2daje » Mon May 31, 2010 10:33 pm

That should tell you most of the pieces you need, but it really isnt that hard to figure out, you should understand what your building not just follow directions.

http://i715.photobucket.com/albums/ww152/jor2daje/mypistonvalve.jpg?t=1275363117
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Unread postAuthor: BeaverRat » Tue Jun 01, 2010 12:09 am

Ok, I knew how to do everything except the back section of the tee... Thanks guys. I take it that the 1-1/4th coupling will be able to fit through a 2 inch female adapter, because I know for a fact it doesn't fit through a male one. If that works, then my last question is how to construct the bumper. Oh, and on a side note, I will be pressurizing via a hand pump, are there any differences I must make such as adding a spring to keep it closed while hand pumping?
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Unread postAuthor: jhalek90 » Tue Jun 01, 2010 6:07 pm

a spring would not hurt. as long as the piston seals well. the hubb piston has an o-ring, and can be adjusted/built to seal very well...

You want the piston to be able to be pushed with one finger through the 2'' pipe.... but not slide back by itself when tipped.

The hubb piston has a check valve as well, so seal the piston as tight as you can, and as long as it still moves fairly easily with a small push from your finger, you alright.


Assuming your piston seals well, a spring would help quite a bit.
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Unread postAuthor: BeaverRat » Tue Jun 01, 2010 6:55 pm

Ok, the valve is finished and I am using a spring to seal the barrel. It will have a 54 inch 1.5 inch diameter barrel and a 32 inch 2 inch diameter chamber for a 1:1 C:B ratio.
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Unread postAuthor: Gun Freak » Tue Jun 01, 2010 7:45 pm

Ok if you need any further help with it, look at Superna in the pneu showcase, it has the same exact valve you are using and the same piston.
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Unread postAuthor: BeaverRat » Wed Jun 09, 2010 10:52 pm

OK! The beast is complete and it works flawlessly!! :)
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Unread postAuthor: Technician1002 » Thu Jun 10, 2010 12:01 am

Post pics and damage photos. Put it in the showcase. Well done. :)
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Unread postAuthor: BeaverRat » Thu Jun 10, 2010 12:57 am

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