On some MVE Dewars comes a welded locking tab. In case the locking tab is broken beyond its utility, then the cryogenic locking tab must be re-welded back onto the liquid nitrogen dewar. The liquid nitrogen dewar needs to be returned to Chart’s facility in New Prague, Minnesota. Take up this alternative only if necessary because welding the locking tab onto the cryogenic Dewar gives grounds for risk to the integrity of the vacuum.
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