Yoke vs. DIN for stage bottles

[DA Aquamaster]

Depends on the yoke and DIN connections involved.

Some DIN valves are 232 bar while others are 300 bar (4350 psi). In contrast some older yokes were only designed for 2250 psi service pressures while other are rated to 4000 psi.

To state that the difference is due to the o-ring is not completely correct, is related to the "DIN is stronger" argument and would imply that a harder o-ring woudl allow a higher service pressure.

The convention of limiting yoke and 200 (232) bar DIN connections to lower pressures in the 3000-3300 psi range has more to do with ensuring regulators are not used at higher 300 bar (4350 psi) service pressures for which they were not designed or intended.

 

[Mike Edmonston]

Depends on the yoke and DIN connections involved.

Some DIN valves are 232 bar while others are 300 bar (4350 psi). In contrast some older yokes were only designed for 2250 psi service pressures while other are rated to 4000 psi.

Yes, but 300BAR valves are deeper than the 200BAR valves. This will not allow you to use a "yoke plug/button" in that valve, and inadvertantly attach a yoke reg. a 200BAR valve will allow you to attach a yoke reg.

To state that the difference is due to the o-ring is not completely correct, is related to the "DIN is stronger" argument and would imply that a harder o-ring woudl allow a higher service pressure.

It has nothing to do with o-ring hardness. it has to do with captured vs non captured. A yoke O-ring has a good chance of extruding at pressures over 3000psi. Yes there are exceptions in the old days, but the OP is looking at current equipment. I doubt he's going to buy regs and valves from the 50's. (although I could be wrong )

The convention of limiting yoke and 200 (232) bar DIN connections to lower pressures in the 3000-3300 psi range has more to do with ensuring regulators are not used at higher 300 bar (4350 psi) service pressures for which they were not designed or intended.

This could very well be true also. Rule of thumb that I use is 200BAR DIN valves on all my AL tanks, and 300BAR DIN valves on all my HP steel tanks. I don't use LP steels, so I don't worry about them.

If the OP buys Yoke regs, he is LIMITING himself in a number of areas.

1. Amount of gas pressure
2. entanglement and dislodging hazard
3. compatibility with other divers and tech teams.
4. cylinder choice when traveling (I can put a yoke adapter on a DIN reg in about 4 seconds)
5. water intrusion, harder to flood a DIN reg that's screwed down than a yoke that's pressed on.

There are more, but that pretty much covers it.

Just get DIN and be done with it.

Cheers

 

[Meng_Tze]

Hope this is not turning into a 'which is better argument'. The OP asked about planning for swaps under water and yoke being better for that.

 

[VooDooGasMan]

Mikes statement is correct a 4000 yoke will more likely blow the o-ring than a din , When pointed out earlier some valves and yokes are slightly different.

Yet D A your correct also, The all din divers, as with my hp set ups I'll pump up to 4700 psi cooled ending psi 4400-4500 psi.

Never a problem in years.

Diving in the tech world, Instructors have there guidlines for overall safety.

My guess is this yoke instructor has lp tanks and makes the reasonable cost for a diver to get in tech, Yet will educate the din side as well.

 

[texdiveguy]

Hope this is not turning into a 'which is better argument'. The OP asked about planning for swaps under water and yoke being better for that.

?????????

Post #1n by the OP--
" Yoke vs. DIN for stage bottles
I have DIN regs and valves on my stages. My tech instructor recommends yoke valves. What do most people use?"

This leaves the door open for a broad amount of input.

 

[VooDooGasMan]

Well remember mike there are fill whip adapters they could put in. doubt they would , but you never can tell when one wants to dive what they have.

 

[Meng_Tze]

?????????

Post #1n by the OP--
" Yoke vs. DIN for stage bottles
I have DIN regs and valves on my stages. My tech instructor recommends yoke valves. What do most people use?"

This leaves the door open for a broad amount of input.

My bad..... was confused with a different thread where the actual question was a bout swapping regs....... sorry

 

[Mike Edmonston]

Well remember mike there are fill whip adapters they could put in. doubt they would , but you never can tell when one wants to dive what they have.

You sir, are correct. Albeit not the norm, it is possible.

 

[Mike Edmonston]

My bad..... was confused with a different thread where the actual question was a bout swapping regs....... sorry

Silly boy... Too much Eggnog???

Cheers

 

[bubbleblowindude]

Says who? The diver I was speaking of was going through at least 4 bottles for deco. And he is not an idiot.

I'm interested in the dive profile and gas supply required for a 4 deco bottle dive. what is maximum depth and bottom time? Run time? deco gas blends and volumes? Back gas volume and mix? I hope you find the energy and time to reply as I am truly interested. Does he carry all gas on the dive? Quite impressive!