"Bob Edwards" wrote in message
m...
Maybe a strange question, but how low can the pressure go in an O2
cylinder and still have the regulator operate properly? My 20 cubic
foot O2 bottle has lasted almost two years with pretty regular jewelry
torch use (Meco midget and Little Torch). The cylinder pressure is
now down to about 475 lbs on the gage -- how low before I should
consider it empty and get it refilled, as I don't want to run out in
mid-project?

Regards,

Bob

If it is absolutely critical that you do not run out of gas during
midproject, get a second. If it is not that critical, just use it until no
more gas comes out, then take it in for refilling or swapout.

When I had a commercial shop, I did not want to run out of gas for any
reason. To do so might cost me a couple of days of production if it
happened over the weekend. You have to decide based on your own business.

Steve