Oxygen cleaning

[wunat]

I understand that oxygen clean a normal regulator is the cleaning and removing of hydrocarbons and other combustible elements. But this is simply removing any contamination right? If the regulator is intended to be used with >40% oxygen mix or even up to 100%, you would still need to replace the o-ring and some other parts right?

This is what I understood originally but after reading through some other threads, why did some simply say "oxygen clean" and that's enough.

How about the o-ring on the hoses and SPGs? Do they need to be replaced as well?

 

[cool_hardware52]

I understand that oxygen clean a normal regulator is the cleaning and removing of hydrocarbons and other combustible elements. But this is simply removing any contamination right? If the regulator is intended to be used with >40% oxygen mix or even up to 100%, you would still need to replace the o-ring and some other parts right?

This is what I understood originally but after reading through some other threads, why did some simply say "oxygen clean" and that's enough.

How about the o-ring on the hoses and SPGs? Do they need to be replaced as well?

A O2 service tech course will cover all these questions, there are also several texts available. Vance Harlows http://www.airspeedpress.com/newoxyhacker.html

Is a good place to start, and a worthwhile read if you plan to use O2 for prety much anything. I have a couple other reference books a the shop, PM me if you want more info.
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If the components will "see" high pressure, high content O2 they need to be:

1) Materials and lubes that are compatible with Oxygen service, for example Oxy-compatible lubes (christo-lube, Kyrtox etc.) and oxygen compatible orings and seats (viton orings etc)

2) The components must "O2 Clean" or free of oils, particulate and other "fuels"

One without the other is not ready for O2 service.

Do the Orings on the HP hose and SPG spool see HP O2?

In addition to Items 1 & 2 above the "System" should be designed for O2 service. That's where Scuba Gear presents a delimma, Virtually no tank valves or first stage regs are designed for O2 service. System design considerations include materials (avoiding aluminum and Ti for example) and the geomtry of the system. Things like sharp turns, sharp internal edges, abrupt transistions from large diameter , low velocity to small diameter high velocity should be avoided. Unfortunately other than avoiding aluminum and TI first stages the diver has little control over the design of tank valves and regs.


Tobin