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To: <AHDNN1A.DDRAKE01@ed*.co*>
To: techdiver@opal.com
Subject: Re: Manifolds, bends, bars, etc.
From: "Ken Sallot" <KEN@co*.ci*.uf*.ed*>
Organization: CIRCA, University of Florida
Date: Tue, 21 Mar 1995 12:54:45 EST

> The Sherwood manifold has extra deep screw-in DIN sockets that are too deep
> to get a yoke around even if you could get a screw-in adaptor.

That "Extra deep screw-in DIN socket" you're referring to is a 300 
bar connection. 200 bar is shallower, therefore you can use the yoke 
converter. 300 bar is deeper, which means you can't use a yoke 
regulator ("A-Clamp") with it. Besides, most yoke regulators aren't 
rated past 3500 psi which is way below 300 bar (4500 psi). If you 
want a 300 bar connection, go with a 300 bar DIN first stage.

> Does anyone have any comments on the O ring design/safety and Trimix?

First I've heard of it, however I'm not a trimix diver. I know some 
guys who dive trimix often enough to have seperate sets of doubles so 
they don't have to "waste all that expensive helium", and they all 
seem to use sherwood manifolds.

One last thing, if you just change your burst disks, your old 
fashioned sherwood manifold would be fine at higher pressure. If 
you're buying a DIN manifold to use with a yoke regulator at really 
high pressure (which is what it sounds like), then I'd have to ask if 
you really really wanted DIN to begin with. One of the advantages to 
DIN is having the captured O-Ring, however with using a yoke adapter, 
you're now introducing two points of failure you didn't have 
before (two O- Rings, the captured one, and the one on your adapter).

BTW, this is just my $0.02.

Ken

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