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Date: Wed, 4 Sep 1996 10:06:48 -1000 (HST)
From: Richard Pyle <deepreef@bi*.bi*.Ha*.Or*>
To: "Alan D. Secor" <secor@bt*.ib*.co*>
Cc: techdiver@terra.net, secor@bt*.ib*.co*
Subject: Re: Pressure in a closed system (like a rebreather).


> flame away (no, I won't be using this in a cave ;) ).  I'm in the process of
> completing a 1 atm submarine that I purchased partially finished.  The closed
> system in this case is rigid so the volume stays the same.  Now, as I
> metabolize O2, will the pressure decrease, such that I can use a simple demand
> type regulator to inject O2 along with a scrubber to remove CO2, and maintain
> a constant internal pressure of 14.7 psi?  TIA (again).


Yes.  This is how the Newt suit does it.  The trick is, you need to seal 
the "outside" of the regulator diaphragm in a container with 1atm pressure.

Aloha,
Rich

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