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> The
>regulator needs a pressure relief valve so that you do not lose your
>hose or damage your drysuit valve in the event of a first stage failure.
>The intermediate pressure of the reg needs to be set way low , like 60
>to 80 psi to keep the action of the inflator very slow ( you anticipate
>and take the pinch off ) and to buy you some time in the event that the
>drysuit valve sticks.

Interesting point I hadn't thought much about (I think most of us have a
tendency just to stick our oldest, tiniest reg on the argon bottle, and
keep our fingers crossed),

What are the preferred 1sts for argon use? I can't offhand think of any
more-or-less current regs that have the pressure relief, apart from the OMS
inflation reg (which they say is only for air!) though there are a heck of
a lot of older USD's that do.


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