Regarding the relevant knowledge of liquid nitrogen tank filling, be careful when filling liquid nitrogen. For new cans or cans in a dry state, be sure to fill them slowly and pre-cool them to prevent too fast cooling damage to the liner and reducing the service life. When filling liquid nitrogen, do not pour the liquid nitrogen on the vacuum exhaust port, so as not to cause the vacuum degree to drop. The cover plug is made of thermal insulation material, which can not only prevent the evaporation of liquid nitrogen, but also play the role of fixing the lifting cylinder, so the wear and tear should be minimized when switching to prolong the service life.

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