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Hi Rick,

On April 18 Rick Wrote:

> The problem is that aluminum 80's only contain 77cuft at 
> 3000psi - not 80.


I replied:

> Not so Rick. There are two Aluminum 80s sold in significant 
> numbers here in the US, Luxfer and Catalina. The Luxfer has 
> a rated capacity of 79.87 Cu. Ft. and the Catalina has a rated 
> capacity of 80.70 cu. ft. Both of these tanks have a service 
> pressure of 3000psi


I stand corrected. Rick was right. My original numbers came from page 75 of
the NAUI advanced manual (old advanced -- new master diver manual). (NAUI
Instructors take note) I just talked to a "Kathrine" in customer service at
Luxfer. She says 77.4 cu. ft. is the volume of air in their aluminum 80 at
the service pressure of 3,000 psi. Live and Learn!

Win Remley
(eating humble pie -- and glad I have the humility to do it!)
deeptek@ao*.co*

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