Why are New 7/8-14 UNF Tank Valves Air-Only?

[Kensei]

I have two tanks with 7/8 inch Thermo 5282-5250 valves that are "EAN Ready" according to the 2004 Thermo catalogue. The new 7/8-14 UNF valve is rated as air-only now .

What changed that makes the current valve "air-only" when the previous one was EAN ready? If I'm using the new valve on an older 3500 PSI, PST tank... is there anything I could do to make the new valve EAN ready such as having the valve professionally rebuilt with O2-compatible components?

 

[Rred]

XS does answer the phone and allow the technical people to speak to outsiders, it might be worth calling directly.
I'd guess either a seat or a seal of some kind was changed, and is no longer oxygen-safe. If that's the case they probably also can tell you if the older style parts can be retrofitted, or if it just something as simple as needing a proper cleaning for oxygen service.

 

[JackD342]

Kind of covered this on your other thread. Don't expect XS to respond on this thread - call them.