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Date: Tue, 19 Mar 1996 13:16:20 -0800
To: deepreef@bi*.bi*.Ha*.Or*
From: bmk@ds*.bc*.ca* (Barrie Kovish)
Subject: RE: C2 death
Cc: techdiver@terra.net

>Rich wrote:
>On the Cis-Lunar, and I asusmed on other fully-closed systems, this "flow 
>restrictor" is simply a first-stage regulator (or analgy thereof).

Once again I can't comment on the Cis-Lunar.  From our experience with
our semiclose circuit rebreather ( it's the cmfv type ) in order to get
4 liters/minute at 130 psi one needs a very very small hole.  We're not 
talking pin head we're talking pin point!  Since these are the specs on 
the CCR-1000 I'm guessing that this is what they have.  In fact they have
a test where you measure the flow rate into the accumulator by bubbling
gas out of a the system into an inverted beaker.  Maybe there is another
mechanism for achieving these low flow rates ( note it appears to be a 
continous flow ).  However it seems likely it involves a simlarly restricted
orifice.  

Barrie Kovish
Vancouver, Canada

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