YOKE vs DIN

[BigDaddyGlad]

I got my first regulator set (HOG D3) for my last dive trip. It's a DIN set. I also have an adapter, which I used on all the dives. Once I figured out the ideal positioning for the tank on my back, I didn't even notice the adapter, though it would have been nice to dive with the lower DIN profile.

I did notice that the tanks all had the removable insert, but I didn't have an allen key with me. I'd like to not have to purchase an entire set of keys; which size would be the one to get to keep in my dive bag, or is there a particular recommended tool?

 

[Bob DBF]

The reason is the YOKE O-ring is quite smaller / thinner and exposed to the elements. Also the way they work is different. DIN O-rings are 'encased' within a groove while YOKE O-rings are 'sandwiched' between 2 pieces of metal, that's why they cannot withstand higher pressures like DIN. That's also why if you accidentally bump your A-clamp you'd probably get a leak. Those O-rings get 'chewed' constantly and dried out by the elements.

The Chairman covered my first point.

While I've heard this my whole diving career, let's take another look. Both o-rings are in a groove and both mate against a face. The bigger and somewhat more forgiving o-ring (DIN) is only seated when the diver who owns the set dives. The yoke o-ring gets banged around, gets used far more often, and is otherwise ignored until it fails.

My second is that a yoke cand stand the pressure it is built to operate at. The problem is that there are yokes still I use that have service pressures of 1800, 2250, 3000, and 3442 psi. This was the big reason DOT specified DIN for 3500 psi and above, back when the first three were in use. Sherwood produced a yoke reg around 1980 that was made for 4000 psi service, prior to the DOT regulation.

The DIN connection is a good innovation for face seated connection, and it may reduce the weight compared to a high pressure yoke. In certain situations it is a much better solution than a yoke, in others it makes no difference.

 

[Celt]

There's no yoke vs din for me as I use both, I n fact I use both on the same twinset. I use a scubapro g250 yoke in the center as I love the scubapro the way it breathes. On the right post I use a poseidon cyklon 300 which I switch to when deep, can it deliver air when needed at any depth. Its just a personal preference.

 

[The Chairman]

I had a real problem in Belize getting the insert out in a number of cylinders.

An impact driver is your friend. Kind of heavy to travel with, but they easily take out the most stubborn adapters.

 

[lexvil]

An impact driver is your friend. Kind of heavy to travel with, but they easily take out the most stubborn adapters.

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Good at Covid protection too, I can see the people running now as you start beating on a beat up tank of the tropics

 

[The Chairman]

Good at Covid protection too, I can see the people running now as you start beating on a beat up tank of the tropics

Work on your aim if you're hitting the tank! A few sharp raps and that insert breaks free.

 

[lexvil]

Work on your aim if you're hitting the tank! A few sharp raps and that insert breaks free.

I’ll stick with bringing a yoke reg to those places.

 

[BigDaddyGlad]

An impact driver is your friend. Kind of heavy to travel with, but they easily take out the most stubborn adapters.

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I can't tell if this is serious or a joke... is there a particular size required to remove the adapter from a yoke valve? If I only need to carry around a single allen key (rather than this beast or a whole set), that'd be the ideal scenario!

 

[wetb4igetinthewater]

An impact driver is your friend. Kind of heavy to travel with, but they easily take out the most stubborn adapters.

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Excellent idea! I'll back that in my travel save a dive kit.

In all seriousness, I'll keep this in mind when I have my own dive center, as even though my practice will be to remove inserts every night, having a sure fire backup plan isn't a bad idea. I recently picked up an impact wrench for swapping summer/winter tires, and I wonder why I hadn't picked one up years ago.

 

[The Chairman]

I can't tell if this is serious or a joke..

I was a mechanic for thirty+ years. I apprenticed as a machinist in college and even worked as a welder as well. This is a must-have tool for me and I own three. The jarring of the hammer with the turning of the anvil will break almost any insert free. If you have just an Allen wrench, then bump it with your hands or even a hammer to break it free. Most people just add more and more torque until the tool rounds out the fastener.