On Thu, 4 Mar 2010 12:47:08 -0600, "William Wixon"
wrote:


"Bob Engelhardt" wrote in message
...

You can re-pressurize aerosol cans with propane. I made an adapter for
recharging paint rattle cans:
http://home.comcast.net/~bobengelhar...anAdapter2.jpg

It screws into the valve of a propane torch. I.e., in place of the
tube. Aerosol cans have different style valves & each style requires its
own adapter.

Bob


that's pretty cool bob (and don).
just curious, the obvious question, how do you know now much gas to put in
the aerosol can? it is a "by ear" thing or is it not possible to over
pressurize a paint can using a propane tank?

b.w.

The latter. Let it take all it will. The pressure won't (can't)
exceed the vapor pressure of propane. At 100 deg F the vapor pressure
of propane is 172 PSIG. Cans can handle considerably more than that.
Propane is used as propellant in some rattlecans.