[PATCH] Fix up SAC calculations for ATM/bar confusion

Dirk Hohndel dirk at hohndel.org
Mon Feb 25 07:09:25 PST 2013

On Feb 25, 2013, at 1:21 AM, Jef Driesen wrote:

> On 2013-02-25 00:02, Lutz Vieweg wrote:
>> On 02/24/2013 11:51 PM, Dirk Hohndel wrote:
>>> Umm - where do you dive with tanks at more than 250bar?
>> Outside the "Int-Valve"-territory this is not too unusual.
>> Appropriate DIN valves, cylinders and refills are readily
>> available in numerous locations.
> I suspect the reason why you don't see many 300 bar tanks in the US is that they require a DIN valve, and as far as I know those are not very popular in the US (or anywhere else outside of Europe).

No, the reason is much more silly. It is illegal to transport tanks holding more than (IIRC) 3400psi across state lines in the US. Even if the tanks are certified by the DOT for higher pressures.

> DIN valves have actually several advantages. They are stronger (which is the reason why you can have a 300bar variant) and more compact, the o-ring is better protected and stays with the regulator, not the tank (which is a nice advantage when using your own regulator on rental tanks).

Trust me, I'm aware of all that. Yet most places I go have yoke valves. So I have yoke regulators.

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