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At 10:18 PM 4/14/2001 -0400, David E. Smith wrote: Hello David, >I don't think it is "common sense" that a valve be fully open or >fully shut. That is a matter of opinion. Clearly there are >arguments/opinions >for either method (fully open or partially shut). Using your logic it could be argued that the main valves should also only be slightly open so one could quickly close the valve in the event of a freeflow. I don't think you're arguing in favor of that. If in fact you're *not* suggesting divers leave their main valves slightly open, then how can you, using the same logic, come to the conclusion that divers should keep the isolator slightly open? There's a reason valves on SCUBA gear takes several turns to close or open. This is *by design*. It's done as an intrinsic safety feature; it take several turns, a deliberate act, to close a valve. Bumping a valve is unlikely to accidentally close it if it's fully open. Leaving the isolator mostly closed defeats this important safety feature designed into your life-support system. -Mike Rodriguez <mikey@mi*.ne*> http://www.mikey.net/scuba Pn(x) = (1/(2^n)n!)[d/dx]^n(x^2 - 1)^n -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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