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Doug Chapman wrote: > > It is obvious that abrasion may occur on an o-ring in a sliding > situation such as when an o-ring is used as a dynamic seal on a 1st > stage regulator piston. (huge snip) > Its all relative to some degree, but the physical configuration > of the groove-oring interface can go a long way to improve reliability. A nice, scholarly treatise, thank you, I'll tuck it away. Errmmm, and your point is? Perhaps that manufacturers should seek better tolerances in O Ring grooves? Forgive me if I'm wrong in this. If not, why then MY point is that: 1) O Rings are cheap; 2) Servicing, when compared to your expectancy of continued life, is REALLY cheap; 3) You don't do (1) and (2) above, why, you're either pretty stupid or have a death wish, 4) O Ring groove tolerances have served us well, by and large, for more years than I care to remember, and 5) Except for those stupid A Clamp O Rings, aka the open face (non DIN) ones on tank taps as those mostly tolerated in the US (but also elsewhere) ... except listmembers, but of course. Cheers, Christian -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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