Dewar is a super vacuum insulated stainless steel pressure vessel designed for storage, transportation and use of liquid oxygen, liquid nitrogen, liquid argon, or carbon dioxide. These containers are manufactured according to DOT4L standards for the transport and storage of cryogenic liquid gases by * and economically, as well as for the storage and supply of cryogenic liquid gases in a wide range of applications. Welded insulated cylinders (Du Waguan), specifications 175, 195, 210,499LNG.

There are two main advantages to a Dewar: the first is that it can hold large amounts of gas at relatively low pressures compared to compressed gas cylinders. The second is that it provides an easy to operate cryogenic liquid source. The dewar strong *, keep for a long time, and contained in the gas supply system, gas flow at room temperature continuous output up to 9.2m3/h by its internal vaporizer can (oxygen, nitrogen, argon gas), the output pressure of 1.2MPa (maximum constant pressure type) /2.2MPa (high pressure type), fully meet the normally the use of gas demand. If the gas flow rate of the users is large, a plurality of Dewar bottles can be connected in parallel or equipped with an external carburetor to meet the requirement of gas supply. By installing an external carburetor, the maximum output flow of an individual Dewar can be up to 30m3/h.