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> Date: Fri, 22 Sep 95 11:54:49 -0700 > Subject: Re: J-valves - word of caution > From: Kevin-Neil Klop <uunet!apple.com!kevink> > To: <uunet!terra.net!techdiver> > >I have remove all the "K" valve from my personal tanks and replaced them > >with DIN (DIN 300) valve. Din valve provide a much more solid attachment > >point for a regulator. > > > Here's an assertion that I'm not too sure of. Why are the thin threads > of the DIN valve so much more secure than the threads on the yoke screw > and/or the brass form on the yoke itself? Note that I dive with a DIN > valve, I'm just not sure that it's all that much more secure than a > properly designed yoke. > > Question: What do they use on YOUR DIN valve to fill it? On mine, they > use a fill block and a (yep) yoke. > When I get fills on my high pressure 120's they have a hose set up for DIN dittings. These fittings have a "service pressure" of 3500psi. The yokes that I have seen have a "service pressure" of 3000psi. I have also seen some people use the block to attach their yoke regulator. Another 'O' ring to fail. And again the pressure in these tanks is over the rated pressure of the yoke they are attaching. More McCormack mmccormack@sb*.co*
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