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At 07:13 PM 6/12/99 -0700, Mat Bloedorn wrote: >I assume the needle valve will be on the mixing panel. >and the cylinders 30 ft away. If this is the case it >is in your best interest to turn the valves on the O2 >cylender on verrrrrryyyyyyy slowwwwwwly. Since the >needle valve is closed you effectively have a long >hose with a dead end at the mixing panel when the O2 >cylinders are first turned on. This could create a >problem area especially if the O2 cyliners are turned >on quickly when the line is depressurised. Perfect >scenario for that adiatbatic thingy to take place. > >Mat. True, but the potential for abusing a valve is there whether the gas line is short or long. There's always a dead end to smack with a violent flow of gas if you choose to be reckless. The best way is to open valves from the receiving end towards the donor side. If you need to gauge the oxygen pressure first, bleed oxygen to the gauge carefully. The gauge hand should rise slowly and need several 10s of seconds to equilibrate. A needle valve gives you the option of going gentle -- it doesn't keep you from putting the pedal to the metal if you elect to be careless! regards, Hans -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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