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According to NOAA, who invented Nitrox, you may use a regular tank for
nitrox mixtures up to 40% O2. For mixes above 40 % the tank should be
cleaned for O2 service and the valve should be cleaned for O2 service
and should contain only O2 compatible soft goods and lubricants.
Of course, if you mix your own gas by adding air (or N2) to some pure
O2, then the cylinder and valve should be cleaned for O2 service,
regardless of the FO2 of the final mix.
If you are purchacing ready mixed nitrox with an FO2 of less than 40%
you can use a regular scuba tank, however it is NOT recomeded that
you alternativly fill a tank with mix and air. You should use a
deticated tank and valve, yellow in color with a green band, and the
word NITROX stenciled on the side. NOAA even stamps the valves
"nitrox" so there's no mistaking that there's something other than air
in the tank.
______________________________ Reply Separator _________________________________
Subject: Tank Requirements for air and nitrox use
Author: ac122@os*.rh*.go* at ~INTERNET
Date: 10/11/94 4:14 PM
Greetings All
I am new on this list. I have been diving for 7 years in the northeast
and I am thinking about taking a nitrox course. Is it possible to use
air and nitrox in the same tank with the same regulator ? i.e. I
do a morning dive with nitrox and then go to the dive shop and drain
my tank and have it filled with normal air. I have heard that Nitrox is
more corrosive and requires silicone O rings and you can't switch back and
forth between the 2. Any info on this subject would be appreciated. Thank you.
--
You Got to be tough if your going to be stupid
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