Vacuum Tray Dryer is appropriate for drying thermal sensitive materials to ensure easy resolving, polymerizing and deteriorating under higher temperature. This can also be used to sterilize the materials prior to the drying procedure. Static vacuum dryer is developed for eliminating the arrangement damage of the drying materials to make them ideal to be used in chemicals, pharmaceutical, foodstuff and other sectors. It is used for highly toxic, heat sensitive and hygroscopic materials. Its safety features include vacuum relief valve, temperature controller, safety pressure relief valve, etc.