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Date: Wed, 8 Nov 1995 16:33:39 -1000 (HST)
From: Richard Pyle <deepreef@bi*.bi*.Ha*.Or*>
To: Paul Chapman <paul@de*.de*.co*.uk*>
Cc: techdiver@terra.net
Subject: Re: Helium Pumping

> I am so fed up with the problems of getting a mix fill round here (NW
England) 
> that I'm going to have to do it myself. Helium cylinders here (from British 
> Oxygen anyway) only have a 137 bar (2000 psi) fill pressure, so even
cascaded, 
> you're going to loose a lot. My question is this:

When I use a 3-cylinder cascade system, my first cylinder is about 
200-300psi by the time my third cylinder is down to fill pressure.  
Hence, I don't waste too much, even without a booster pump.

Aloha,
Rich

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