The cryogenic Dewar bottle, invented by Sir James Dewar in 1892, is an insulated storage container. It is widely used in the transportation and storage of liquid medium (liquid nitrogen, liquid oxygen, liquid argon, etc.) and the cold source of other refrigeration equipment. The cryogenic Dewar consists of two flasks, one placed in the other and connected at the neck. The gap between the two flasks partially empties the air, creating a near vacuum, which significantly reduces heat transfer through conduction or convection.

product advantages:

1.It is mainly used for transportation and storage of liquid oxygen, liquid nitrogen, liquid argon and liquefied natural gas
2. High vacuum multilayer insulation side ensures low evaporation rate, and inlet valve instrument ensures good performance
3. The built-in evaporator automatically provides 9nm3 / h stable continuous gas
4. The gas space overpressure gas is used in the throttle device
5. Pole with international CGA standard connector
6. The unique damping ring design can meet the requirements of frequent transportation

cryogenic Dewar bottles have been widely used in mechanical processing, laser cutting, shipbuilding, medical, animal husbandry, semiconductor, food, low-temperature chemical, aerospace, military and other industries and fields. The utility model has the advantages of large storage capacity, low transportation cost, good safety, reducing gas pollution and easy management.

Generally speaking, Dewar bottle has four valves, namely liquid use valve, gas use valve, vent valve and booster valve. In addition, there are gas pressure gauge and liquid level gauge. The Dewar bottle is not only provided with a safety valve, but also with a bursting disc [6]. Once the pressure of the gas in the cylinder exceeds the trip pressure of the safety valve, the safety valve will immediately jump and automatically exhaust and relieve pressure. If the safety valve fails or the cylinder is damaged by accident, the pressure in the cylinder rises sharply to a certain degree, the explosion-proof plate set will break automatically, and the pressure in the cylinder will be reduced to atmospheric pressure in time. Dewar bottles store medical liquid oxygen, which greatly increases the oxygen storage capacity.