Which area is DIN valve popular at?

[Storker]

Note that this is not suitable for a 300b valve, but those are rather rare.

Again, that depends on your location. I see quite a few 10L and some 12L 300 bar singles around here¹, and D7x300 isn't uncommon either. Now, since 300 bar is a bit of a PITA for PP blending due to compressibility effects, it's mostly used by those who either dive air or have access to a continuous blending system.

¹ I use 10x300 tanks myself, and in a drysuit there are advantages to that. The smaller outer tank volume means less lead, and when I went from an old 15x200 to my current 10x300s, I could take some 3-5kg off my belt.

 

[Patoux01]

Wops, I wasn't clear. I meant a 300b valve on a 200b tank. Yoke regs shouldn't be used against a 300b pressure anyway.

 

[АлександрД]

Russia - all tanks is DIN. In case of customers Yoke regulator we just use Ввёртыш ("In-screwer") - that one:

Egypt - most tanks, that I saw is DIN, but half of regulators is Yoke, used adaptor as above.
Turkey - same.
Yes, for usage of that adaptor you have to have only DIN 200 valve.

DIN300 unsupportable and you have to use that one:

Most universal way - when you have DIN regulator and such adaptor:

Just one disadvantage: quite heavy

 

[Compressor]

A good way to figure this out is to see what kind of tanks the country uses. For example, look at the rental prices and see what they have. At least I would think so. If they are high pressure (>3000 psi) then DIN will be common.

In Bonaire, almost all Yoke.
In Caymans and Bahamas, almost all yoke as well.

 

[Storker]

Wops, I wasn't clear. I meant a 300b valve on a 200b tank.

Ah, I see. I doubt that would be legal up here, so probably pretty rare, yeah. AFAIK, the yoke inserts are machined to fit 200/232 bar valves, but not 300 bar valves, so it'd be pretty difficult to get a yoke reg to seal.

At least here, it's physically impossible to fit a 300 bar whip to a 200/232 bar tank valve, or to seal a 200/232 bar rated reg against a 300 bar tank valve. The stub which protrudes from the center of the whip valve is longer and thinner on a 300 bar than on a 200/232 bar so the whip valve can't bottom out and seal. And the thread on a 300 bar rated reg or tank valve is longer, so a 233/232 bar rated reg won't reach the bottom and seal. My reg set is rated for 300 bar, and if I fit it on a 200 bar or 232 bar tank (which I've done on several occasions), about two turns of the thread is showing.

 

[gcarter]

Use a converter. It’s not a big issue.

It can be. Not every DIN valve can be used with yoke with an insert. If it is not a convertible valve with the dimple on the back you will not get a secure connection with a yoke.

 

[drbill]

With the convertible DIN/yoke valves these days you shouldn't have any trouble diving elsewhere. I have both DIN and yoke valves and regs but when I travel I carry my DIN reg with a yoke adapter

 

[Altamira]

Going to be diving in the Red Sea, and have discussed the issue of yoke/DIN with my dive ops. 200 bar DIN appears to be the standard in Egypt, but they all have the inserts for yokes. Of course, I am going to carry along a couple of spare DIN inserts just in case.

 

[Grey Goose]

South Africa was DIN

 

[CJS]

Dahab seemed to be DIN standard.