[PSUBS-MAILIST] Fw: O2 cleaning

[Sean T. Stevenson via Personal_Submersibles]

If you don't already own a copy, pick up a copy of the Oxygen Hacker's Companion, by Vance Harlow:

http://www.airspeedpress.com/newoxyhacker.html

That said, plain carbon steel is a less ideal material for O2 use than is brass or stainless. You also want to avoid the use of any fast acting valves in oxygen systems. Use needle valves where possible.

To clean parts for O2 use, just avoid the use of solvents and use a hydrocarbon free cleaner. My preference is Orange TKO, but there are many others. Simple Green also seems to be popular. Use as directed, and check both your cleaning brushes and the rinse water with a UV light to ensure that it is coming away clean. Just repeat the cleaning / rinse until it does. To dry, small parts and fittings can dry in ambient air, but tubing, hoses, and more complicated parts with dead spaces will have to be blown dry. This must be done with hydrocarbon-free air (I.e. nitrox quality) or e.g. pure nitrogen, to avoid recontaminating the parts.

You want to replace any soft parts in your oxygen system with oxygen compatible materials where necessary (I.e. Viton O-rings and oxygen compatible valve seats), and then use O2 compatible lubricants exclusively. The gold standard for this is CHRISTO-LUBE MCG 111.

Finally, if you're assembling any tapered thread connections (NPT), use a PTFE or other thread sealant suitable for oxygen systems.

Sean

-------- Original Message --------
On Jan. 13, 2020, 15:53, hank pronk < hanker_20032000 at yahoo.ca> wrote:

Hi Sean,
I am installing the O2 paediatric regulator in E3000 now.  I have a tower valve that accepts the regulator, and the valve screws directly into the hull penetrator.  The hull penetrator is a steel nipple.  How do you recommend I clean the nipple and fittings?  I have an O2 braided ss hose to the tank.  The hose is actually from my O2 cascading set up.
Hank
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