DIN or YOKE and why?

[Theepdinker]

I own 3500psi steel tanks.
Requires 300bar DIN.

It's not likely some inattentive person is going to gear up with my tank on the boat.

Theep

[terrillja]

Yoke, my LDS only does yoke fills, so to get a DIN fill, I have to drive about 30-45 minutes vs 20 minutes to get a fill.

[in_cavediver]

Originally Posted by terrillja

Yoke, my LDS only does yoke fills, so to get a DIN fill, I have to drive about 30-45 minutes vs 20 minutes to get a fill.

For a small bit of change, you can get a DIN to yoke adapter for fills. Dive Rite has one for $40 and I know Sherwood makes one as well.

[terrillja]

Originally Posted by in_cavediver

For a small bit of change, you can get a DIN to yoke adapter for fills. Dive Rite has one for $40 and I know Sherwood makes one as well.

The other reason why I use yoke it because oceanic only offers the DVT system on its yoke regs. I have one Oceanic CDX5 yoke with DVT and one CDX5 with DIN, and a yoke adapter. I like the DVT feature, and is one reason why I bought a yoke reg and tanks. Not to mention that the cost to buy new din valves at this point for my 3 cylinders would be a lot.

[mwhities]

Originally Posted by terrillja

Not to mention that the cost to buy new din valves at this point for my 3 cylinders would be a lot.

I've found the Thermo Pros for 40.00. That'd set you back 120.00 but, it'd be worth it. You can use both DIN and Yoke tanks.

Michael

[ian]

Yoke. It's more standard in US for rentals/boats/etc.

DIN is a European thing! It stands for Deutsches Institut für Normung, which means German Institute for Standardization. It is an agency much like our own ASTM (American Society for Testing and Materials). They both develope standards for testing and analysis of industrias processes and materials.

There is a mistique about German engineering that it is far superior to anything else anyone else in the world has to offer. At one time, that was actually quite true. However, the concept was built heavily upon the idea that if 1/2" plate steel was good, 3/4" was better and 1" was even better. In other words: overkill. Rigidity and overstrength are NOT always good ore even desirable!

The DIN valve IS stronger because there is little or no play in the fastened valve parts. The threads incontact with each other are quite strong.

The yoke connection can flex. However, unless there is a catastrophic failure of the metal in the yoke band, it is NOT going to rupture.

In BOTH cases, (YES, BOTH CASES) the O-ring is captured in the joint. Look at where the O-ring is seated in BOTH styles to see that this IS true! The difference is that the DIN valve cannot flex around the O-ring while the yoke style can, IF the valve is not connected properly.

The yoke style valve is more than adequate for the task at hand. The yoke style valve is inherantly stronger, but only marginally so and the added strenght is not merited or needed.

In my opinion, if there is an advantage of the DIN system over the yoke system, it is due to the more "rookie-safe" nature of the DIN threaded system. In other words, it is harder to screw up the DIN connection than it is the yoke connection. However, I have seen a few who have managed to cross thread the DIN valve, rendering it completly useless!

Go with what you have, but remember that there are yoke-to-DIN converters but no DIN-to-yoke converters (that I am aware of).

BTW - my reg and tank are all yoke...

[in_cavediver]

Originally Posted by ian

Yoke. It's more standard in US for rentals/boats/etc.

DIN is a European thing! It stands for Deutsches Institut für Normung, which means German Institute for Standardization. It is an agency much like our own ASTM (American Society for Testing and Materials). They both develope standards for testing and analysis of industrias processes and materials.

There is a mistique about German engineering that it is far superior to anything else anyone else in the world has to offer. At one time, that was actually quite true. However, the concept was built heavily upon the idea that if 1/2" plate steel was good, 3/4" was better and 1" was even better. In other words: overkill. Rigidity and overstrength are NOT always good ore even desirable!

The DIN valve IS stronger because there is little or no play in the fastened valve parts. The threads incontact with each other are quite strong.

The yoke connection can flex. However, unless there is a catastrophic failure of the metal in the yoke band, it is NOT going to rupture.

In BOTH cases, (YES, BOTH CASES) the O-ring is captured in the joint. Look at where the O-ring is seated in BOTH styles to see that this IS true! The difference is that the DIN valve cannot flex around the O-ring while the yoke style can, IF the valve is not connected properly.

The yoke style valve is more than adequate for the task at hand. The yoke style valve is inherantly stronger, but only marginally so and the added strenght is not merited or needed.

In my opinion, if there is an advantage of the DIN system over the yoke system, it is due to the more "rookie-safe" nature of the DIN threaded system. In other words, it is harder to screw up the DIN connection than it is the yoke connection. However, I have seen a few who have managed to cross thread the DIN valve, rendering it completly useless!

Go with what you have, but remember that there are yoke-to-DIN converters but no DIN-to-yoke converters (that I am aware of).

BTW - my reg and tank are all yoke...

I disagree on a couple things. First, DIN is superior to yoke in the capture of the o-ring. It is truly captured in behind the threaded portion and is in non movable area. The Yoke o-ring, while technically captured (compression seal in a o-ring groove) still is in a moveable area. A blow to the 1st stage can allow the compressed surface to move and the o-ring to extrude. Not common but possible. This is the reason many/most tec divers use DIN.

Second, Thermo makes some great yoke/din convertable valves in 200bar (I have 4 of them on my stages). Included is a din plug with a standard yoke o-ring that inserts with a hex key. IE, yoke/din convertable tank. Use what you need.

That said, if you have a yoke reg and a non-convertable din tank - your screwed. Din reg - with din/yoke converter works fine on yoke tank.

[dmdoss]

Yoke, when I rent.

[tnfireman]

Yoke I have my own tanks but they are not the only tanks I use. I have seen very few DIN in my area.

[ScubaGir1]

I have a DIN to Yoke adapter. I don't own a tank, and most rentals are Yoke. But, since I figured sometime I will travel to an area that rents DIN tank, or if I feel like going DIN, then I always have the adapter. But for the most part, I just use Yoke