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Wendell, below is the link to a site where you find pics and a german
description of the russian cryostat.
It is an OC system, one might be tempted to think of using the cold to
freeze out CO2, in a rebreather.

http://www.rz.unibw-muenchen.de/~j0bs0067/drdietmarberndt/index.htm

Wendell Grogan schrieb:
> Thanks for the information about the russian system.
> As for the oxygen concentrators, this is actually a very new system.  It
> is in two parts.  The first is a typical oxygen concentrator that
> delivers about 2 to 6 liters per minute of 94% O2 at ambient pressure.
> The new thing is the second part which is a compressor that is designed
> specifically to be mated to the concentrator.  It boosts the pressure to
> about 200 bar. 


Very interesting.
I heard of a similar German system to do the same, but the company did
not reply to my mail. 

regards
Matthias





 This can then be used to fill a standard oxygen tank.
> The flow rate is very slow which is why it takes 6 hours to fill a
> relatively small bottle, but that is also how it can be used in homes of
> people who don't know anything about oxygen handling.
> Haven't checked the prices yet.  But this is medical equipment so it
> isn't going to be cheap.
> Wendell
> >
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