Din/yoke valve and HP tank pressure limit.

[fisherdvm]

Same question posted earlier. But now a shop employees tells me, I can't fill my HP tanks (rated 3442) at more than 3000 psi because it has the yoke screw in converter in it. He said I would have to get DIN regs if I wanted to have the tank filled above 3000.

He claimed that it is the reason why the O ring blew when he filled it past 3000, because it was never intended for the yoke valves to handle more than 3000. This is the second time I've heard this from a tank tech - yoke can not be filled more than 3000.

Most SB here before said the issue is not yoke vs din, but it is the regulator that determines if you can fill the tank more than 3000.

Apparently, 2 different techs are telling me otherwise, and one blamed the blown 0 ring on the pressure.

 

[divinginn]

I have been using a hp 100 for 2 years on a yolk reg without issues,but getting a fill past 3200 psi is just about impossible,I cant even get full fills on my lp tanks.

 

[Rick Inman]

Take out the din valve insert before you drop the tank off. What kind of reg you use is your business.

 

[GrumpyOldGuy]

Check you regulator manual - It probably list 3442psi as the max working pressure if its yoke. Print or photocopy it and show it to your tank monkey instead of wasting your breath arguing with him.

 

[spectrum]

You had a bad o-ring
or
He had a wimpy yoke.
or
He had the fill yoke on cockeyed or not even snug
or
It was just one of those days.

Modern yokes are generally rated to 3442 and diving them as such is very common and the tank connection is just an option.

Removing the adapter plug to let them fill it as a DIN is OK but I try to keep DIN whips of questionable condition out of my valve threads.

Pete

 

[Dive-aholic]

Hmmmm, the couple of yoke regs I have left seem to do just fine with pressures in the 3200-3400 range.

This is typical tank monkey "I'm filling the tanks and know more than you do" talk. Ask to see his credentials. I'll bet he doesn't have any.

 

[redacted]

The yoke o-ring is probably more vulnerable to extrusion than the din design and added pressure does increase the chance of failure. But the bottom line is that valve and most yoke regs are rated to safely operate at pressures up to 3442. "Safe", however, does not mean failure free.

I would be pretty unhappy with any shop that tried to feed me crap to the contrary. If you have choices, maybe you need to exercise them.

 

[ucfdiver]

Sounds like your shop can't fill to high pressures and is making excuses.

 

[SparticleBrane]

"Shut the ******* up and fill my tanks, or I'm taking my business elsewhere."

 

[ucfdiver]

"Shut the ******* up and fill my tanks, or I'm taking my business elsewhere."

Best advice of the thread.