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my air cannon keeps leaking plz 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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my air cannon keeps leaking plz help

Unread postAuthor: Crna Legija » Sun Jul 20, 2008 6:24 am

i have a fire extinguisher and its just a bit bigger then 1/2 inch and it keeps leaking i put lost of PTFE tape and still leaks at around 100 psi can eny1 plz help me ?
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this is where it is leaking
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just a pic of my air cannon
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Crna Legija
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Unread postAuthor: Necrosis » Sun Jul 20, 2008 6:31 am

Just a question.. did you actually thread it on? Or did you just put the tape on and then pushed the extinguisher on?
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Unread postAuthor: VH_man » Sun Jul 20, 2008 6:58 am

1 word......

EPOXY RESIN

it will hold that sucker on ther NICE and solid without any leaks.

im interested to see the final product it looks sweet........
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Unread postAuthor: Fnord » Sun Jul 20, 2008 8:32 am

1 word......

EPOXY RESIN


?

But yeah, that should work. I'd smear JB weld on the threads myself.
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Unread postAuthor: Crna Legija » Sun Jul 20, 2008 8:34 am

EPOXY RESIN is that just a 2 part glue?


and yer it threads on but it moves around a bit
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Unread postAuthor: TurboSuper » Sun Jul 20, 2008 9:38 am

Epoxy is effectively a 2-part glue (and is considerably stronger than most other glues), and would probably be your best bet. JB Weld is the best stuff to use.
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Unread postAuthor: jr » Sun Jul 20, 2008 11:07 am

If the chamber is moving around that is bad! Use the epoxy. When I did my extinguisher I smeared the pipe fitting and the threads on the extinguisher. No leaks and that dog ain't coming out no how.


O and by the way; we like to use proper grammar. So if you want a little respect on this forum use proper grammar. Please (not plz)! And if you need help use the spellcheck button.
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Unread postAuthor: nivekatoz » Sun Jul 20, 2008 1:29 pm

If I were you ,I would have someone weld a reducer on it that has npt threads. You could also try to find a steel or aluminun oxygen tank and have the threads recut so they will be npt or have some welded on..
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