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Description
Freeze drying will not occur in natural surroundings. The pressure in the environment must be lower than ice boiling point pressure. That is why vacuum system must be used in freeze drying to reduced the surroundings pressure. Vacuum is used all kinds of freeze dryers. But vacuum dryer is different from vacuum freeze dryer. The working principle of the previous one by water evaporation and the latter one by ice sublimation. The quality of dried products are totally different by the two methods.
Features
1, Heat-sensitive material will not inactivation
2, Drying in a sealed vacuum chamber, product will never oxidized.
3, The color of freeze dried material will not become dark.
4, Under vacuum, without oxygen, so substances easily oxidized have been protected.
Technical Data
Freeze dryer needs to be worked in low temperature and vacuum condition, so refrigeration system and vacuum system must be adopted on freeze dryer. High quality Germany Bitzer or Italy Refcomp refrigerator and Germany Leybold, and also Siemens control systems are supplied in KEMOLO freeze dryer system to ensure stable performance.
http://www.freeze-drier.com/