Cryogenic storage tank vacuuming
When evacuating the low temperature storage tank, the following points should be noted: the vacuum should be evacuated indoors when the air temperature is low, otherwise the outdoor temperature is too low which will affect the vacuum effect. The connection should be tight and the vacuum grease should be wiped clean and should not drip. The vacuum pump should run continuously without interruption. If the pump stops running due to accident or power failure, it should be disconnected from the vacuum layer of the storage tank immediately, otherwise the vacuum pump oil will flow back to the middle layer, which will cause pollution accident. When the vacuum pump is running, pay attention to whether the cooling water is intermittent and the temperature of pump oil does not exceed 40℃.
