[time-nuts] Making a 10811 better

J. Forster jfor at quikus.com
Tue Sep 20 20:25:46 UTC 2011


You would want to use a Freon with much higher BP. It take a lot os PSIs
to keep R-11 liguid.

BTW, why on earth would you want to fill a balloon with SF6? It's much
heavier than air.

-John

==============


> At 03:39 PM 9/20/2011, Don Latham wrote...
>>Long ago and far away, I recall a friend using a gas that had its
>>liquid/gaseous transition near room temperature and was inert (not an
>>inert gas) to pressurize a vessel having high impedance circuits in
>>it.
>>I'm darned if I can remember what it was. Available in so-called "lab
>>bottles" ie not monster cylinders.
>
> Trichlorofluoromethane (R-11, CFC-11) has a boiling point of ~24C. It
> is available (although not manufactured, and most commonly in 100 lb
> cylinders), but is the worst of the "Freons" with regard to ozone
> depletion.
>
>
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