On Mon, 25 May 2020 00:38:47 -0000 (UTC), bob prohaska
wrote:

Clare Snyder wrote:
On Sun, 24 May 2020 03:06:57 -0000 (UTC), bob prohaska
wrote:

Clare Snyder wrote:
At 30C R22 is about 160psi
Freon tanks have a "blowout disc" that ruptures at something
approaching 600PSI. A freon tank is likely safer than a lot of cheap
"air pigs" designed to operate at 120PSI . painting the interior to
protect against moisture MIGHT be a good idea (on the air pig too - -
- )

How would a 20 lb propane cylinder compare? It's getting hard to
have them requalified in my area....

Thanks for reading,

bob prohaska
Definitely a lot more sturdy than the freon tank. I'm using one. I
unscrew the valve and use pipe thread fittings.When I pull the valve I
clean it out with hot water and amonia to get rid of the mercapitan
stink.

That's a deodorizing trick I didn't know about. Thank you!

bob prohaska
I have been using a 30 lb tank mounted upside down to get the fitting
on the bottom. A 3/4" nipple and Tee fitting with the drain and infeed
check valve to the side branch while the outlet is a pipefitted
through the bottom and up into the centre area fo the tank. safety
valve and controls aer on the output. In this way I avoided the need
for additional bosses to be welded to the tank. I also have a similar
settup with regulator/filter on the input when I want lower, regulated
pressure. I don't know how I ever got along before I blew a whole
three bucks on an old Gardner/Denver single cylinder @ cfm compressor!
Of course it cost another dollar for a 1/2HP motor to run it and about
$70.00 for controls and safety valve etc.