What state should the liquid oxygen storage tank maintain when it is in use?

What state should the liquid oxygen storage tank maintain when it is in use?
1. The liquid level of the liquid oxygen storage tank should be within the normal storage range, and after the necessary products are made, they are evacuated to a vacuum state.
2. The liquid oxygen storage tank is used to collect and transmit the liquid automatic control amount to the central control room, and it needs to be tested and calibrated for years. The liquid level gauge and the storage tank capacity should be corrected according to the density of the storage medium; the first cut-off door with the storage tank for the past few days shall not be used as the control valve for entering and exiting the material, and the switch at two ends every three days is not allowed. 
3. The liquid oxygen storage tank should be kept in the normally open state, and the button should be opened for a period of time to maintain flexibility and ease of use. Because the liquid oxygen storage tank is very tight when the first valve succeeds; after the low temperature valve is used for a period of time, it will produce liquid leakage. If you notice a slight leak in the upper gland, press the packing gland tightly. If the valve core fails to close the door, the valve core should be transferred. Refueling and washing with water are strictly prohibited for the low temperature cut-off door; other substances should not be left in the outskirts of the liquid oxygen storage tank to block the pedestrian passage and operation, and keep the site clean and tidy. 
4. Before using the liquid oxygen storage tank, a small amount of liquid nitrogen should be put into it to pre-cool it. When the temperature in the tank falls to the temperature of liquid nitrogen, the liquid nitrogen should be filled up in the low temperature storage tank, and the low temperature storage tank should be carefully stored. When the tank is handled, it should be handled with care to prevent it from being knocked down and choked. If it is not possible to drag it in the local area, it should be lifted and moved. The storage tank should be stored in a dry and well-ventilated room from time to time to guard against moisture.
5. The important role of the liquid oxygen storage tank: the low temperature storage tank, also known as the low temperature tank or the liquid nitrogen tank in Changchuan, its structure can not be divided into two layers, the first layer even so the inner layer is composed of Austenitic stainless steel is made of this material, except for the layers, which are made of interlayers filled with somewhat insulating aggregates, which are evacuated after making the necessary products.
6. The liquid oxygen storage tank is used for the low temperature liquid storage and storage of liquid oxygen or liquid nitrogen and carbon anhydride and other gases. We can replace 130 gas cylinders with one cubic meter of liquid water, which can replace the daily round-trip transportation of gas cylinders, saving generous human and material resources. It is widely used in the gas industry, health care stations, big hardware metallurgy and other users with large gas consumption. It is a comparable product that implements complete gas supply. It has long service life, compact structure, small footprint, centralized control, and easy operation. and other characteristics.