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> I want to rig a small O2 bottle for a shallow decompression gas. Can > anyone help me out? > > Should I purchase a medical O2 bottle and try to rig it with a scuba > valve? Will either an old-style 1/2" scuba valve or a modern valve fit > the O2 threads? > > Or, should I detacate a small scuba pony for O2 use? If so, how do I > get the tank filled? > > Will a welding supply store have the necessary adaptors to connect to > scuba valve? (I am assuming that welding O2 is as good as medical > O2). > > Luxfer has a tchnical bulletin that recomends that their scuba tanks > not be filled with O2. I suspect that they are trying to avoid > liability. Does anyone know if it really matters? >-- >Send mail for the `techdiver' mailing list to `techdiver@opal.com'. >Send subscription/archive requests to `techdiver-request@opal.com'. First, you'll need to have the bottle O2 cleaned. Second, use a low pressure cylinder. O2 tanks usually are filled to a max of 2250psi, so you need a bottle that is full close to that pressure rating. You'll really want an 80/20 mix so that you can use the mix as deep as 30fsw safely. SCUBA cylinders are fine; I use 30 cu.ft. pony bottles for deco I strap on and carry with me and I have a steel 72cu.ft. cylinder I hang over the side at 30fsw. When you top off the tank with air (to make the 80/20 mix) you need to make sure that you're getting oil free air. You'll also need an O2 cleaned regulator. Welding gas is the same except for the degree of flitration. I get my tanks filled at my local tech. dive shop here in Ventura County California and of course have certification in Nitrox etc. Harold Gartner 6900 Via Alba Camarillo, California 93012 home: (805) 482-9743 office: (213) 487-6240 CompuServe ID# 71470,1423 Internet: halg@ce*.ne*
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