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Well for one reason, if you are filling Nitrox (by partial pressure blending) at any of the dive shops in my area, they won't fill if you don't have a Viton o-ring (and the magic sticker) as evidence of O2 clean tanks. As we all know, nitrile is guaranteed to explode immediately in the presence of pure oxygen, just like all those cars in Hollywood that explode every time they run into a fruit cart. >Why on earth would one use a viton O-ring in this location? The yoke seal >O-ring is well known to be so stressed and critical that most SCUBA >manufacturers provide specially compounded O-rings - usually a harder, more >extrusion resistant compound like polyurethane - just for this application, >and it's pretty well accepted that using a generic nitrile O-ring on the >valve is asking for trouble. > >And then viton is known to be less durable than nitrile, and a poor choice >for high wear or high extrusion applications. > >I'm not arguing for yokes here - given my druthers, I'd have DIN, but if >one is using them (and a lot of us are), using the right O-rings can >greatly decrease the risks of failure. > > >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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