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>I do. And am a repair technician for both the VALVE and the FIRST STAGE. It >still blew. It was an almost brand new viton o-ring with less than one hour >on it and was inspected prior to use. > 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'.
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