3500psi valve from DIN to yoke?

[novasquid]

I have an HP119 tank with thermo pro valves with yoke inserts, will those yoke inserts work with a 3500 psi DIN valve? Any easy way to convert it to yoke?

 

[Fishpie]

DIN valves are usually measured in BAR.......200BAR and 300BAR.
The difference is the number of threads, 5 for the 200BAR and 7 for 300BAR.
The 300BAR valves are DIN only.
The 200BAR valves often come with inserts that make them convertable INT (yoke) to DIN.
These inserts will not work in 300BAR valves.

 

[novasquid]

I learned something new today. Thanks!

 

[Scared Silly]

DIN valves are usually measured in BAR.......200BAR and 300BAR.
The difference is the number of threads, 5 for the 200BAR and 7 for 300BAR.
The 300BAR valves are DIN only.
The 200BAR valves often come with inserts that make them convertable INT (yoke) to DIN.
These inserts will not work in 300BAR valves.

The above is spot on but let me add one more to dispel a myth.

Even though 300 bar valves have seven threads they are no stronger than 200 bar valves with five threads.

Here is a very good explanation of valves:

SCUBA Valves, Regulator Fittings, and Cylinder Neck Threads - Dive Gear Express

 

[mathauck0814]

DIN valves are usually measured in BAR.......200BAR and 300BAR.
The difference is the number of threads, 5 for the 200BAR and 7 for 300BAR.
The 300BAR valves are DIN only.
The 200BAR valves often come with inserts that make them convertable INT (yoke) to DIN.
These inserts will not work in 300BAR valves.

Said perfectly.

 

[peta510]

I don't want to make a new thread since this was already made. I have a 300BAR tank and I have a regulator that uses yoke. So there is no adapter out there? Also I there a 300 bar to 200 bar adapter? If I want to use this 300 bar tank that I have I'm going to have to buy a regulator that only can be used on 300BAR tanks? Thank you for all the help in advance.

 

[Dr. Lecter]

300bar is a valve-reg thread term: the valve threads into which the DIN reg screws are 7 threads deep. Any DIN reg can screw into any DIN valve, 200 or 300 bar -- it's just a question of how far into the valve the reg will have to screw before seating itself.

00bar simply means the valve threads into which the DIN reg screws are 5 threads deep -- however, 5 threads deep is also how thick a yoke adaptor insert is, so it works with a 200bar DIN valve. On a 300bar DIN valve, the insert screws in too far for the yoke reg to seal to it -- preventing you from using a yoke reg on a 300bar valve no matter what.
This is by design, because some yoke regs are not rated for the higher pressure tanks to which those valves are often attached. Thus, for the same reason, there is no 7 thread thick yoke adapter, though theoretically there's no reason one would not work.

Tanks, however, are not 200 or 300bar. They're fillable to a specific rated pressure (whether measured in psi or bar). Higher pressure tanks sometimes have 300bar valves, though aside from fiber-wrapped tanks rated above 4000psi, I don't think any need 300bar DIN valves because modern yoke regs are good up to 3500psi.

Anyway, the easy answer to your question is that if you have a yoke reg and a tank with a 300bar DIN valve, you just need to replace the valve with either a yoke or a 200bar DIN valve. That's it, problem solved.

 

[peta510]

The problem is that it's an older steel tank. I cannot put a yoke or 200bar DIN valve on the tank because of the threads. Sorry I'm a bit confused so if I have a DIN regulator will it work with this 300bar din valve tank? Or will it leak since it wont screw in all the way?

 

[Scared Silly]

The cylinder threads you are speaking about are 7/8-14 UNF which are 7 thread (300 bar) valves. Most modern DIN regs have 7 threads - BITD 5 thread DIN regs were made.

Also many modern regulator can easily converted from Yoke to DIN very easily.

 

[Dr. Lecter]

The problem is that it's an older steel tank. I cannot put a yoke or 200bar DIN valve on the tank because of the threads. Sorry I'm a bit confused so if I have a DIN regulator will it work with this 300bar din valve tank? Or will it leak since it wont screw in all the way?

My understanding has been that any DIN reg will work on any DIN valve no matter what; only difference is a DIN reg screws two threads further into a 300bar DIN valve than it does into a 200bar DIN valve. Though SS seems to say that there were once some DIN regs with shorter, 5 threads only compatible with 200bar DIN valves . . . unlikely you have one of those.

The cylinder threads you are speaking about are 7/8-14 UNF which are 7 thread (300 bar) valves. Most modern DIN regs have 7 threads - BITD 5 thread DIN regs were made.

SS, I could have sworn I saw some 7/8 Genesis yoke valves, but I was probably mistaken.