DIN Regulator O-ring Standardization?

[Marek K]

OK, next question regarding DIN regulator fittings...

I understand that the inlet o-rings on DIN regulator fittings have a tendency to fall out... obviously if they're not capped. (Yes, I know...) So I'm trying to add a supply of appropriate o-rings into my save-a-dive kit.

But I also understand that there are no standard sizes for those o-rings... that the o-ring size varies from manufacturer to manufacturer.

Which is kind of ironic, considering the purpose of DIN standards.

Sure enough, one manufacturer lists the AS568 o-ring size for their DIN fittings as -0011. While one supplier of scuba-related o-rings lists DIN o-rings as being -0112. Seems like quite a difference in dimensions.

It would make sense that DIN o-rings would be metric... but only if they were actually standard.

So... Do they vary? Does it make much of a difference?

--Marek

 

[rescuediver009]

I have found that they are all R(V)112 and Apeks is R(V)111. I don't know where you got R011. You must have misread.

 

[Marek K]

I have found that they are all R(V)112 and Apeks is R(V)111. I don't know where you got R011. You must have misread.

Yes, you're right... I misread or mis-typed... -011 would be a standard LP port, right? It was Zeagle that I found, that at least implies (guessing from their part number) that their DIN fitting o-ring is -111.

So the vast majority use -112, with just maybe a couple of exceptions using -111?

Thanks!

--Marek

 

[mania]

Mare
Honestly - never saw an o-ring in DIN falling out.....

Mania

 

[dbulmer]

It's happened to me - it's rare but it can happen.

 

[Marek K]

Mare
Honestly - never saw an o-ring in DIN falling out.....

Mania

I wouldn't think so either, particularly if the cap is kept on securely.

If.

But other people -- besides dbulmer -- have apparently seen it too.

Maybe they were using the wrong size o-ring??

And when have you ever been less than honest with me?

--Marek

 

[mania]

Love....
Mania

 

[Marek K]

Love....
Mania

:06:

 

[aquaoren]

Hi Mania, actualy this is a phenomenon of some regs.
If there is a rest pressure in the regs when disassembling the kit from the valve, it may press the O-ring out of the groove.
Eventhough I love my Mares Abyss, I have to admit that it happens from time to time, as the system sometimes keeps a minute residual pressure even when purged completely. You have to wait couple of seconds and purge again in order to vent this residual pressure.

 

[dbulmer]

Wrong size O ring Na, Don't think so - how about ***** happens?