Ice in my dewar! (Liquid helium transport dewar)
From NMR Wiki
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Scenario: | Scenario: | ||
| - | The | + | The Dewar will not pressurize, or pressurizes reluctantly. |
| - | The | + | The Dewar will not vent via the regular vent port. |
Some of the safety valves do not vent any gas. | Some of the safety valves do not vent any gas. | ||
[http://andysoper.synthasite.com/resources/NMR_Links_and_Widgets/Liquid%20Helium%20Transport%20Dewar%20Up%20Close%20and%20Personal%20Version%201.2.1.doc download] (MS Word) | [http://andysoper.synthasite.com/resources/NMR_Links_and_Widgets/Liquid%20Helium%20Transport%20Dewar%20Up%20Close%20and%20Personal%20Version%201.2.1.doc download] (MS Word) | ||
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[[Category:Cryogenics]] | [[Category:Cryogenics]] | ||
Revision as of 19:13, 12 March 2009
Here is a solution to an iced-up Liquid helium Transport Dewar. This is of special interest to sites which are far from their liquid helium supplier, and who perform their own liquid helium fills.
Scenario:
The Dewar will not pressurize, or pressurizes reluctantly. The Dewar will not vent via the regular vent port. Some of the safety valves do not vent any gas.
download (MS Word)
