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Re: Carbon dioxide leak? Valve failure? Overfill?
In a message dated 98-12-13 03:59:31 EST, you write:
> I took the tank back and of course they gave me another. Their only
> explanation is that it must have been overfilled and when it warmed up
> in my car it was enough to blow the safety valve, which could have been
> defective. >>
> Very strange, crazily strange. I taught H.S. physics and chemistry and have
> never heard of such. The gas at human-car temperatures should not, would
> have caused the OP valve to open (goes to several hundred psi, and that's
> at a stated ambient temp.)... and it could not have been overfilled... even
> all the way to the top... very strange and scary. Could it be the temp. of
> liquefied gas causing the valve to fail as the cylinder lay over less than
How 'bout this explanation. They tank and the CO2 was cold, and they
overfilled the tank, so it contained a *lot* of liquid CO2 and not much gas.
The liquid is not compressable, so when it expands (due to the temperature
rising to ambiant) the pressure skyrockets. It's been a while since I have
seen a phase diagram for CO2, but the more liquid you put in a pressure tank,
the less compressable room you have left. And liquids expand when they are
I've seen some really heated discussion about this topic on an airgun forum.