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On Fri, 7 Jan 2000, Don W. wrote: > The freeflow rate is a function of depth, but not as much as you would > think. Your 1st stage regulator keeps the intermediate pressure to your > 2nd stage at ~150 PSI above the surrounding pressure and the freeflow > rate is a function of the intermediate pressure. > > For example if you are at 330 ft (~100M), the pressure increase from the > surface was 147PSI (10 bar) and the intermediate pressure in your hose > is about 150+147 = 297 PSI or roughly double. At this depth, you would > lose gas to a freeflow approximately twice as fast as at the surface. Most likely NOT. Any significant leak or freeflow will cause the IP as measured by the first stage to be well below the zero-flow setting. If that is so, the 1st stage will be WIDE OPEN in an attempt to bring that IP up to spec. At that point, the depth dependent functionality is out of the picture. -- Art Greenberg artg@ec*.ne* -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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