Quote:
Originally Posted by HITandRUN
Yeah I had one of those as well! It was a 20L dewar. You could fill it up to the top and leave it there for a week without barley loosing 1/4 of it. I dont see how the relief valve would do it. I think its more bad vacuum in this case.
Pressurizing the dewar with a bad vacuum will make it leak out faster so leaving it not pressurized will less longer.
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Interesting info there HitandRun. So if it is a bad vacuum, how fast would you guess my evap rate is going to be on the dewar? I literally live right by the gas company so I could start benching pretty fast.