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Thread: Oxygen compatible grease

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    Euge Euge is an unknown quantity at this point Euge's Avatar
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    Oxygen compatible grease

    I was wondering if anybody has used any other brands of o2 compatible grease? I came across a product called Krytox, it says it is o2 safe.

    There was a site selling this stuff for £5.99 for 10g - not a bad if its OK.

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    RBW Member jcolley is on a distinguished road jcolley is on a distinguished road jcolley's Avatar
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    Re: Oxygen compatible grease

    Works fine for the US Navy for our divers and O2 systems. :D

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    Re: Oxygen compatible grease

    It was used extensively in the Canadian Navy as well but we have switched to Cristo Lube now (not sure why)

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    New Member Bill Pringle is an unknown quantity at this point Bill Pringle's Avatar
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    Re: Oxygen compatible grease

    Castrol makes Braycote 601EF lube NASA approved for manned space flight HP 02 applications being the Micronic version for ultra clean/pure systems, it is quite spendy.
    The 803 is nearly the same composition less the ultra clean credentials is a lot less money and perfect for HP O2 systems not having to be built in a clean room for a space station.

    There is also Cristolube, have seen and used it as well away from work at the dive shop, appears identical to the braycote lube, lots of traffic on the web on this stuff but not sure whom makes it.

    And the before noted Krytox 240AC is also used in military O2 breathing systems but we have typically used in a few older programs at much lower pressure applications. less than 500 psig.

    Difference between the Bracote/Cristolube & the Krytox from an applications standpoint is the Krytox will with time breakdown seperate the polymers from oils where the braycote/Cristolube does not. Our techs just like the Castrol stuff better.

    From a costs standpoint you may want to check out the Cristolube or the Braycote 803, but I doubt that it will beat the Krytox in price.

    At the end of the day all these lubes will work fine for diving O2 systems.

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    Re: Oxygen compatible grease

    Quote Originally Posted by Euge  View Original Post
    I was wondering if anybody has used any other brands of o2 compatible grease? I came across a product called Krytox, it says it is o2 safe.

    There was a site selling this stuff for £5.99 for 10g - not a bad if its OK.
    IMHO Sounds too much for too little. remember a small 2oz tube is 56g
    So your 10g is insignificant. Dont waste your time.

    If you do go ahead and buy it make sure its new in a sealed tube with the full company product details on the tube and has a batch code printed on the reverse label. Too much ex WD old crap, or reloaded into smaller tubs with the bum hairs and fluff picked out, re labled and hawked on Ebay by low lifes.

    Do a search Locktite Dupont Krytox RFE part 29711. if either U.S. or Europe.
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    Re: Oxygen compatible grease

    Anyone used Fomblin or Halocarbon?

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    New Member Bill Pringle is an unknown quantity at this point Bill Pringle's Avatar
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    Re: Oxygen compatible grease

    Halocarbon lubricants scored well within the O2 compatibility database, however no experience with using it, not sure of out gassing or toxicity levels
    Did not see anything under Fromblin.

    Did a little searching around on the web and came across the attached, does a good job describing the how and why of O2 clean & compatible breathing systems.


    ENGINEERING NITROX PARTIAL PRESSURE BLENDING SYSTEMS © 2001

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    Re: Oxygen compatible grease

    I use Krytox and I haven't blown up yet ;)

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    Re: Oxygen compatible grease

    I use Molykote medium 33 , not gone bang as yet :p

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    Re: Oxygen compatible grease

    Quote Originally Posted by jmhardingjr  View Original Post
    Anyone used Fomblin or Halocarbon?
    Rocol Fomblin works fine for me!

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