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What absolute pressure does a thermos lining have?

What absolute pressure does a thermos lining have?

What absolute pressure does a thermos lining have?

(OP)
Title says it all.  What absolute pressure is attained in a Thermos (TM) vacuum jacket?

-Plasmech

Mechanical Engineer, Plastics Industry

RE: What absolute pressure does a thermos lining have?

Well, according to http://www.popedewars.com/labgrade.html

laboratory Dewar flasks are in the neighborhood of 10-5torr

I suspect that a run-of-the-mill Thermos for keeping your soup hot wouldn't bother to have such a good vacuum - a diffusion pump is needed to get down that low.

A decent mechanical vacuum pump could probably pull something like 10-3torr.  I'd imagine a Thermos is in that range.

RE: What absolute pressure does a thermos lining have?


From Google:

maximum pressure of a thermos bottle lining: 0.001 torr
typical: 10-6 torr.

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