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a few propane questions

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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Unread postAuthor: frankrede » Tue Mar 03, 2009 7:58 am

OR you could just clean it at home?
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Unread postAuthor: psycix » Tue Mar 03, 2009 10:29 am

cannon monkey wrote:ok the idea of wat psycix was saying using a pvc pipe chamber and all of that but i wanted to use a small propane tank form my mini grill for a few reasons
1 no leaks from the tank
2 i can have 1 or 2 of them
3 i can fill it up by small hand pump right on the spot

1- A well made PVC chamber doesnt leak. You could also fix leaks with epoxy.
2- If you can make one pvc chamber, you can also make two! Or one being twice as big (more weight efficient)
3- And that is the idea of the PVC chamber.

Last but not least, a propane tank is far heavier then a pvc chamber.
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Unread postAuthor: cannon monkey » Tue Mar 03, 2009 12:00 pm

well see i can never make my own chamber with pvc mine always leaked no matter wat i did i tried 3 times and i waited the 24 hours to test them.....
any help on how to make one that will not leak?
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Unread postAuthor: psycix » Fri Mar 06, 2009 2:06 pm

Some tips:
- Do not use DWV pipe and fittings. These got shallow sockets and that means there is not enough welding surface.
- Before solvent welding, clean the PVC with rubbing alcohol.
- Make sure to apply primer and then cement.
- Make sure to apply enough of it
-After applying cement shove the sockets completely into each other and THEN turn them 90 degrees. This is a important step that is commonly forgotten.
-Still got leaks? Epoxy seals it.
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Unread postAuthor: cannon monkey » Fri Mar 06, 2009 2:22 pm

thanks alot i missed i few steps i never cleaned it or turned after using the glue's

ok ok i got one LAST THING
on the small propane tanks the valve is that a one way where only propane can leave it
or can air go in to it too?
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Unread postAuthor: psycix » Fri Mar 06, 2009 4:21 pm

Its not a one-way. Think logical:
They have to be able to put the propane in, yet you should be able to get it out.
But it does have a valve which makes sure that it cant leak air to the outside when nothing is connected.
Usually there is a ball pressed against a rubber seal, when you thread something onto the tank, this presses the ball back and the propane is free to go.

It does have a horrible flow though. The tank isnt ment to be emptied in a few seconds.
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Unread postAuthor: cannon monkey » Fri Mar 06, 2009 4:34 pm

i not wanting it to empty in a few secs but yet wat the tiny hole on the side of the valve for than?
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Unread postAuthor: ramses » Fri Mar 06, 2009 4:46 pm

If you mean on the little nub thing that goes into the propane cylinder, that is where the propane goes into the torch.

If you mean the tiny hole on the end of the pipe, closer to where the flame would be, that is for the aspirator. It increases the velocity of the propane to suck in air for that awesome 2-part blue flame we all know and love.
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Unread postAuthor: cannon monkey » Fri Mar 06, 2009 8:49 pm

no there 2 holes on the tank a big one hat u put the touch on and a smaller one slide of a pen tube beside it bout inch to one side
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Unread postAuthor: psycix » Sat Mar 07, 2009 10:03 am

A picture would clear this up.
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Unread postAuthor: cannon monkey » Sat Mar 07, 2009 10:31 am

never mind i got somthing else other than a propane tank here pics of wat i have ( i going use a bigger tank soon i get the money )
not sure if i doing this right but...

http://i81.photobucket.com/albums/j233/ ... 2_2591.jpg
http://i81.photobucket.com/albums/j233/ ... 2_2592.jpg
http://i81.photobucket.com/albums/j233/ ... 2_2593.jpg
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