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To: bazza@sy*.DI*.oz*.au*
To: techdiver@opal.com
To: "Terry McCracken" <terrym@it*.ns*.co*.au*>
Subject: Re[2]: O Rings and using O2 mix
From: "Andrew Cohen" <Andrew_Cohen@cc*.ss*.nm*.go*>
Date: Tue, 28 Feb 95 12:15:00 EST

     Terry,

     I have also heard that some people recommend O2 O rings for 
     concentrations above 22 %.  I don't know of any physical evidence to 
     back up that particular concentration.  It seems a bit conservative to 
     me.

     Here at NOAA, we don't use special compatible parts unless the 
     concentration of O2 exceeds 40%. I don't know who thought up that 
     particular figure either, but I am not aware of ANY problems that have 
      ever resulted from non-O2 compatible components being used with 
     either NOAA Nitrox I or II (EANx 32 or 36).

     By the way, the Nitrox tanks and valves are O2 clean with O2 
     compatible O rings because the Nitrox is mixed right in the tank, with 
     a higher Po2 than the finished product.


______________________________ Reply Separator _________________________________
Subject: Re: O Rings and using O2 mix
Author:  "Terry McCracken" <terrym@it*.ns*.co*.au*> at ~INTERNET
Date:    95/02/28 7:59

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