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To make sure there are no back-flow contaminants.
Susan
______________________________ Reply Separator _________________________________
Subject: Re: New angle 300 bar
Author: Dave Mabry <dmabry@mi*.co*> at Internet
Date: 4/17/96 9:12 PM
Maybe a dumb question, but unless the tank is completely empty to start the
fill, why would you have to evacuate it?
bruce_butler@cc*.wd*.di*.co* wrote:
>
> The main difference between medical grade and industril grade is that
> with medical grade the cylinders are evacuated (they pull a vacuum) to
> eliminate the possibility of any contaminating gases.
>
> bruce
>
> ______________________________ Reply Separator
_________________________________
> Subject: New angle 300 bar
> Author: Mario Nicola <colacave@di*.ne*> at WDI-INTERNET
> Date: 4/17/96 10:11 AM
>
> > I heard they were using industrial oxygen for nitrox and telling people
> > aviators was harmful. Any truth to this that you know of?
>
> This is another fine example of BS and strokery.
>
> Aviators oxygen, I believe is checked to make sure it
> has a low moister content for obvious reasons, but I'm not
> an aviator so don' t take my word for this.
>
> As far as industrial and medical oxygen is concerned
> there is absolutely no deference between the two.
> The cylinders are filled from the same liquid oxygen bank,
> the difference is in the maintenance and handling of the tanks,
> and believe me, I have seen industrial tanks in a lot
> better shape than medical cylinders. This does not mean this is
> always the case.
> Oxygen is oxygen is oxygen. No deference other than what you
> are breathing it out of, and impurities that can enter the tank during
> transfer. This is why o2 should always be analyzed before using or
> mixing.
> Mario
>
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--
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Dave Mabry dmabry@mi*.co*
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