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YDD Series Liquid Nitrogen Tank, is mainly used for cold assembly, cold treatment, storage of livestock’s semen, also can be used for storage of blood plasma, skin, internal organs, vaccine and microorganism,etc. In addition, also apply in the research of metallic physical property, space technology and electronic industry, etc. In a word, it has been widely used in Agriculture and Forestry, Animal industry, Medical Treatment and Public Health, Industrial and Mining Enterprises, National Defense and Scientific Research industry, etc.
1.  Specification 
Available from 2L to 960L, Diameter of   mouth and neck can be customized following customers’ request.
2.  Structure Feather 
YDD Series Liquid Nitrogen Tank is made from austenitic stainless steel and epoxy GRP, with good cryogenic property, beautiful profile and high strength,etc., can be used in various environment.   Style B products have been added supporting structure, strengthening durable property for transportation. 
Liquid Nitrogen Tanks adopt high vacuum-------multilayer heat insulation, vacuum chamber equipped with adsorbent; it can keep vacuum degree for a long time. 
Tank Lid is made up cap and core plug, Core plug is made by rigid foam plastic with good insulation property. The surface of vessels is polished finish, elegant appearance. 
3.  Usage and Maintenance of Liquid Nitrogen Tank
(1) Usage of Liquid Nitrogen Tank
• This vessels can be used for liquid nitrogen(liquid oxygen and argon), when filling with liquid oxygen , it must be cleaned carefully to extirpate greasy dirt.

• Please check if it is clean and dry inside of tank, if it is sinking and serious impact.

• The methods of perfusion:  
â‘  It must be precoolled with little liquid before perfusion; 
â‘¡ It’s very important to let vaporing gas inside of liquid nitrogen tank exhause smoothly during perfusion;
â‘¢ No over capacity filling.  
•  Liquid supplement: 
During being used for long-term storage, it needs to supplement liquid periodically. The right time of supplement is when the remain capacity is one third of total capacity.

• Except Style B product, the rest is not only to clean the tank, also avoiding topple over; during transportation and usage, we should avoid excessive impact, shake and hit.

• Strictly prohibit putting things on tank lid and sealing mouth. 
• Strictly prohibit unwrapping protection cover of vacuum nozzle. 
(2) Usage of Liquid medium  
•  Liquid medium is ultralow temperature liquid, the operator must abide by handling points, attention to labor protection, strictly precautions frostbite.

• It must be draughty for the place of filling liquid medium and storage of tanks, avoiding    suffocated or other safety accident causing by evaporation of liquid medium in quantity.

(3) Maintenance of Liquid Nitrogen Tank  
• It is not allowed to clean frost on neck and pipe by rigid things, in order to avoiding damage neck and pipe to decrease the tank property. The following handling rules to clean frost:

•  After long time usage, it is must to clean up moisture and other impurity inside of tanks. When clean the tank, it is must to evacuate the liquid firstly, natural temperature reaches to above 0 degree, then clean the inside by neutral detergent, then wash by water, finally it’s drying. You can choose to let it naturally drying, or warming up the inside, the temperature must be controlled less than 50 degree.