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Sean T. Stevenson wrote:
> 
> I own a couple of Sherwood Blizzards and have used them extensively
> without freezing problems, but for deep diving (>250') I prefer to use
> my Maximus since it can be tuned to breathe easier at depth.  I
> believe (perhaps incorrectly) that both of these regs use the same dry
> first stage, and I wonder if there is any significant difference in
> the design of the Blizzard second that makes it less susceptible to
> freezing than the Maximus?
> 
> Comments?
> 
> -Sean
> 
> --
> Send mail for the `techdiver' mailing list to `techdiver@terra.net'.
> Send subscription/archive requests to `techdiver-request@terra.net'.sean
basically the only differences between the maximus and the current model 
blizzard lie in the adjustability mechanism/hose junction and the front 
cover. both use the same diaphragm, case and lever support ie internally 
they are the same except for one component. this is sherwood part 
no.3902-22 described as an exhaust fin but generally referred to as a 
heat sink. ican guess what it would do to your warranty but i suspect it 
should be possible to install this unit into a maximus (it will 
definitely fit - i just don't know how much good it will do). the manuals 
show intermediate pressure of the maximus as 120-140psi (I know a lot of 
service techs set closer to 150psi) and the blizzard at 120-135 (with the 
 almost identical oasis 2 at 135-150. i'm told that the lower ip of the 
blizzard means less pressure drop at the 2nd stage valve, therefore 
theoretically less temperature drop also - you may need to play around 
with ip if you decide to experiment
the part needed list for $2.40 in the current sherwood list

if you try it let me know if it makes a difference
regards
tony phillips

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