Recertify your bottles

[Dabbler]

If you change gassses, the bottle has to be repainted (of course)

--My supplier at Air Liquide (before they were bought) indicated that something changes in the valve on Argon vs Oxygen, but I never learned what, or if he was BS'ng me.

 

[Hruul]

Is it possible there is some sort of flame arresting apparatus in the valve if its oxygen versus an inert gas?

 

[Dabbler]

My best guess is the valve seat material. In an oxygen environment, some seats are more dangerous. In the case of Noble gasses, that's not a consideration.

-just my best guess

 

[Brent H]

The Oxygen valves will have a different thread size on the valve outlet and the valve itself is manufactured with some different components - typically viton o-rings, all lubrication will be oxygen safe like Christo-Lube MCG111 and the parts will be all Oxygen safe cleaned so no grease is present. Also I believe the oxygen valves are able to be back seated to prevent stem leakage- at least that was shop practice: acetylene just open enough for flow and the O2 was always wide open and back seated to prevent leaks. The bottles have to be O2 cleaned as well after hydro/inspection before any use with O2.