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air tanks

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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air tanks

Unread postAuthor: qwert123 » Wed Jan 19, 2011 6:09 pm

i am looking for a air tank that will hold at least 150 psi with 1" or 3/4" threads, i have seen fire extinguishers used, how well do they work? the size i am looking for is about the same as the fire extinguisher.
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Unread postAuthor: metalmeltr » Wed Jan 19, 2011 6:16 pm

I belive they do not have NPT threads and modifications must be made.
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Unread postAuthor: Gaderelguitarist » Wed Jan 19, 2011 6:52 pm

Use a short steel nipple that fits inside the threads of the tank and a strong epoxy. Rough up the contacting surfaces with sandpaper before bonding. This will give you male threads to attach into your system.
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so many muchness
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Unread postAuthor: qwert123 » Wed Jan 19, 2011 7:27 pm

oh, i have access to up to a 2" tap and dye, non standard threads aren't a problem
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Unread postAuthor: Technician1002 » Wed Jan 19, 2011 9:20 pm

Small refillable Propane tanks have 3/4 thread in the US. They come is smaller sizes such as 1 gallon with the full size BBQ valve. Nominal working pressure is 260 PSI.

If you look for them, you can find them with the obsolete POL valve for free. I have 2 of them. :D I have a couple of 11 lb, 25 lb and 45 lb. I'm using an 11 lb for my 2.5 inch QDV. I have future plans for a 3 inch and 4 inch in the larger tanks.
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