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Strict requirements for vacuum pumping of cryogenic storage tank
Date: Feb 21, 2020
Pay attention to the following aspects when the cryogenic storage tank is evacuated: The connection of the storage tank must be tightly connected, and the vacuum grease must be wiped out to prevent leakage. The vacuum pump of the pressure vessel must be continuously operated without interruption. If the pump is stopped due to an accident, power failure, etc., it must be immediately disconnected from the vacuum layer of the storage tank, otherwise the vacuum pump oil will flow back into the interlayer and cause a pollution accident.
When the vacuum pump of the cryogenic storage tank is running, pay attention to whether the cooling water is interrupted and the temperature of the pump oil does not exceed 40 ° C. Vacuuming should be performed indoors when it is cold, otherwise the outdoor temperature will be too low, which will affect the vacuuming effect. Pay attention to the maintenance and maintenance of the vacuum pump of the storage tank. Vacuum pumps are often kept clean and no other objects should be placed on the pump.
In addition, the oil tank needs to be changed every time it is pumped. This is because the pearlescent sand fines in the interlayer are easily pumped into the vacuum pump cylinder when the pump is running under vacuum. Vacuum, oil change is best performed after the oil temperature rises. Pay attention to the amount of oil added. If the oil is too much, it will cause start-up problems, oil return, injection and other undesirable phenomena.
To use the Meyer vacuum timer, it needs to be slowly rotated to an upright position. After the measurement is completed, the storage tank must be restored to its original horizontal position immediately.
To prevent the vacuum of the cryogenic storage tank from falling, the storage tank must not be bumped during installation and transportation, and pay special attention to the explosion-proof device of the pressure vessel and the vacuum valve. If the airtightness test is divided, the leak point should be handled before vacuuming.
When the vacuum pump of the cryogenic storage tank is running, pay attention to whether the cooling water is interrupted and the temperature of the pump oil does not exceed 40 ° C. Vacuuming should be performed indoors when it is cold, otherwise the outdoor temperature will be too low, which will affect the vacuuming effect. Pay attention to the maintenance and maintenance of the vacuum pump of the storage tank. Vacuum pumps are often kept clean and no other objects should be placed on the pump.
In addition, the oil tank needs to be changed every time it is pumped. This is because the pearlescent sand fines in the interlayer are easily pumped into the vacuum pump cylinder when the pump is running under vacuum. Vacuum, oil change is best performed after the oil temperature rises. Pay attention to the amount of oil added. If the oil is too much, it will cause start-up problems, oil return, injection and other undesirable phenomena.
To prevent the vacuum of the cryogenic storage tank from falling, the storage tank must not be bumped during installation and transportation, and pay special attention to the explosion-proof device of the pressure vessel and the vacuum valve. If the airtightness test is divided, the leak point should be handled before vacuuming.
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