Mailing List Archive Mailing List Archive
On the 21st Dan wrote:
We had a major thread on techdiver and cavers as to the benefits of
din. No one could come up with an
example of a yoke failing due to crashing into the ceiling. Besides
the fact if you exercise a little bouyancy control, that should'nt
happen anyways.
Regards
Dan Keenan
<end>
Here are two examples of why the DIN is better that did involve yoke
valve sealing failure while diving. Many people I know have used DIN
for their main tanks and regulators, back mounts, but continued to use
the yolk for deco gas to save some money. I personally had a problem
with my nitrox deco mix reg leaking rather badly around the yoke o
ring seal. After getting back to the shop, I looked at it and asked
people why it wasn't sealing. One guy said well you have too much
play here between the A clamp and the regulator body even though the
clamp was screwed down on it. After many failed attempts to seal it
(it had worked fine on dives before) I took the A clamp off the body
and looked at them both real good. That's when I noticed that the A
clamp had been bent so that the flange that holds the reg. body was no
longer perpendicular to the hand screw you tighten up when you seat
the regulator on the tank valve. I got a new one for the next weekend
and am using a Scuba Pro yolk valve with a spring gauge on the back
with that reg. for my Argon not my deco gas anymore. This would not
happen on a DIN fitting! All of the deco bottles were put on their
side in the front of the boat with regs on and were moved/rolled
around a bit and took a pounding on the way out to the wreck. My
guess is the reg got hit and the A clamp bent at that time...
The second is more serious and was told to me by a friend. Scene:
cave dive in Mexico deco stop time on O2. Open tank valve, and bits
of ring come out with a lot of gas. Now picture trying to piece
together an o ring 'cause you need the O2 in that tank. Everyone else
has DIN valves, so you can't scavenge an o ring... What do you think
happened to that valve when the dive was over? In to the jungle never
to be used again! A captured o ring wouldn't fail like this and
wouldn't have gotten cut up in tank handling as was suspected in this
case.
It's your life. See Richard Pyle's sig. for more info.
David B. Drake EDS/SATURN Infrastructure 8-320-4190 on GMnet
Spring Hill, TN USA Internet: saturn.ddrake05@gm*.co*
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]