Mscdex
Contributor
With all this pony talk, I was wondering how people store a 19cf pony. Since you hopefully will not use it any time soon, do you keep it full or bleed it after a dive?
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With all this pony talk, I was wondering how people store a 19cf pony. Since you hopefully will not use it any time soon, do you keep it full or bleed it after a dive?
With all this pony talk, I was wondering how people store a 19cf pony. Since you hopefully will not use it any time soon, do you keep it full or bleed it after a dive?
Mscdex,
If you have a tank equalizing whip, you can use this solution: The Luxfer Web site (L6X® aluminum cylinder specifications - Luxfer: Setting The Standard Worldwide) lists the following:
A Luxfer Al 80 contains 77.4 cu ft at 3,000 psig, and has an internal volume of 687 cu in.
A Luxfer Al 19 contains 19.9 cu ft at 3,000 psig, and has an internal volume of 175 cu in.
So, at the end of your diving season drain both your Al 80 and your Al 19 pony to 300 psig, and store them away (standing and chained/roped/bungeed).
At the beginning of your next diving season, have your Al 80 filled completely. Then use your equalizing whip to *slowly* equalize your Al 19 pony with your Al 80. If my back-of-the-envelope calculations are correct, both tanks will equalize out to ~2,400 psig! Go diving with these tanks. The first dive of the new season will be relatively shallow, correct? So 2,400 psig in your Al 80 and Al 19 should suffice.
Next time you fill your Al 80, equalize your Al 19 pony again. Now your pony and your Al 80 are both full (essentially) and are ready for your second dive of the new season.
Safe Diving,
rx7diver
P.S. Um, check my quick calculations, though! Might be better to drain only to 500 psig.
P.P.S. Of course, if you're using a HP 80 or HP 100 (instead of an Al 80), you will be able to completely fill your Al 19 pony the first time you equalize.