Why do cryogenic gas cylinders need to be evacuated regularly?
Once the vacuum degree is restored to the factory value, the insulation performance of the cryogenic gas cylinder can be significantly improved.
Why do cryogenic gas cylinders need to be evacuated regularly?
Due to the slow degassing of the container material and the leakage rate of the vacuum interlayer seal, the insulation performance of the LNG dewar flask will decrease after a certain period of use due to the loss of vacuum in the interlayer. After the insulation performance decreases, the liquid inside the cryogenic gas cylinder absorbs heat and vaporizes, causing the pressure in the inner tank to increase. Subsequently, the gas is frequently released through the safety valve, and the stored liquid will also decrease rapidly when not in use, causing unnecessary economic losses.
Once the insulation performance of the cryogenic gas cylinder is poor, the frequency of gas discharge from the safety valve will increase geometrically. Therefore, in the case of vacuum loss in the cryogenic gas cylinder, a professional vacuum pump group must be used to supplement the vacuum degree of the cryogenic gas cylinder interlayer. Once the vacuum degree is restored to the factory value, the insulation performance of the cryogenic gas cylinder can be significantly improved.
