Our company has more than 30 second-hand lyophilizers, including Shanghai dongfulong, Shanghai Pudong, Shanghai taishida, Shanghai Yutian, etc. Models are 1 square, 3 square, 5 square, 7 square, 10 square, 13 square, 15 square, 20 square, 23 square and other models. The equipment is about 90% new. If you want a second-hand lyophilizer, please contact us. Company perennial high price purchase? And responsible for large project demolition work, welcome to discuss, our purpose: "integrity service, win-win cooperation" The company specializes in second-hand vacuum freeze dryer sales; equipment quality 90% new; equipment model 1 square - 40 square meters; equipment accessories complete; after installation can be normal operation; the company guarantees the quality of equipment; equipment installation if there are quality problems; the company fully refund; company tenet: customer first, good faith-based; friends who need equipment are welcome to visit the factory or telephone The vacuum freeze dryer is suitable for drying high-grade raw materials, Chinese herbal pieces, biological, wild vegetables, dehydrated vegetables, food, fruit, chemical, pharmaceutical intermediates and other materials. Freeze vacuum drying is a new type of box structure, which combines the refrigeration system, vacuum system, heat transfer oil heating system and moisture removal system. It can greatly utilize the storage space in the box for drying. After starting the machine, the material is put into the material box for freezing. On the one hand, the vacuum system is used for vacuumizing to take away part of the moisture; on the other hand, when the material is frozen, the water contained in some molecules is discharged to the surface of the material for freezing. After the freezing requirements are met, the material is heated and dried by the heating system, and the water content in the material is carried to the Freezing Trap by vacuumizing The header is frozen to meet the freeze-drying requirements. Freeze drying is the process of removing water or other solvents from frozen biological products by sublimation. Sublimation refers to the process in which a solvent, such as water, changes directly from a solid state to a gaseous state without going through a liquid state, like dry ice. The product obtained by freeze-drying is called lyophilization, and this process is called freeze-drying. Traditional drying can cause material shrinkage and destroy cells. During the freeze-drying process, the structure of the sample will not be destroyed because the solid components are supported by solid ice in its position. As ice sublimates, it leaves pores in the dry residue. This preserves the integrity of the biological and chemical structure and activity of the product. In the laboratory, freeze-drying has many different uses, it is indispensable in many biochemical and pharmaceutical applications. It is used to obtain long-term preservation of biological materials, such as microbial culture, enzymes, blood, and drugs. In addition to long-term preservation stability, it also retains its inherent biological activity and structure. For this purpose, lyophilization is used to prepare tissue samples for structural studies (e.g., electron microscopy). Freeze drying is also used in chemical analysis, where dry samples can be obtained or concentrated to increase analytical sensitivity. Freeze drying is an ideal auxiliary method for analysis, which makes the composition of the sample stable and does not need to change the chemical composition. Freeze drying can occur naturally. In natural conditions, the process is slow and unpredictable. Through the freeze-drying system, many steps have been improved and subdivided to accelerate the process.