The inner design and structure of YDS series liquid nitrogen dewar container 

   

 
Inner Structure
(1)The liquid nitrogen container consists of an inner container, an outer container, a canister and a neck tube linking two containers above. The strength durable inner container and outer container are made up of high strength aluminum alloy.

(2) The storage tank employs multi-layer thermal insulation material in high vacuum space between the inner and outer containers. Therefore it has excellent performance of deep freezing.
(3) The neck tube is made of reinforced glass plastic which has the lowest heat conduction coefficient, and for this reason it can control outside heat coming into the container from the neck tube to the minimum limit.

No.	Teminology	Definition
1	Geometric Volume	Volume of space defined by the geometric size of the inside wall of the inner vessel（excluding that of neck tude）
2	Caliber	Inside diamater of the neck tude
3	Outside Diameter	Outside diameter of outer shell
4	Height	Maximum axial length of the shell( exclude the plug and canister
5	Empoty Weight	Weight of container with plug at the ambient temperature ( without canister)
6	Static Holding Time of Liquid Nitrogen	Days for the thorough evaporation of the statically stored liquid nitrogen in the fully re-filled container after being pre—cooled by liquid nitrogen and reach its thermal balance( without canister)
7	Life Service	Days for interval between EXW and holding time eing less than 40% of the EXW specification