On Tue, 09 Mar 2004 12:13:53 -0500, Jeff Wisnia wrote:

|I just sprang a whole buck at a flea market for a brand new "converter"
|intended to let you use a "disposable" 30 lb freon tank as a portable
|air tank. The gadget's got a schrader valve filling inlet, a dial
|pressure gage, some kind of blowoff valve, a shutoff valve, and a few
|feet of hose with a tire valve chuck on its end.
|
|I've had a near empty R22 can sitting around from back when I added AC
|to our last home's hot air heating system. That was when you could
|legally DIY that kind of stuff, and could even buy precharged equipment
|and tubing to let you get a system up and running without a vacuum pump.
|The original heating installers had left us a plenum where I could stick
|an "A coil", so the whole job was a snap.
|
|I looked up the pressure temperature curve for R22 and it gets up to
|around 150 psi at 80F, so I figure the tank ought to be safe for holding
|125 psi air for occasional tire filling and blowout jobs I don't want to
|drag my little home compressor over to.
|
|Anything I'm missing here or should worry about?

Jeff
Guys have been doing that as long as I can recall. I think the pressure
rating of those tanks is an undisclosed number around 400#.
125 - 150 PSI should be no problem.

Oh, and if it is, your heirs can sue whoever made the tank
Rex in Fort Worth