Dry Heat Sterilizer is mainly used for sterilization of high temperature resistant materials. It uses circulating hot air as working media for sterilization and depyrogenation and meets GMP and FDA requirements. Put articles into chamber, start sterilization cycle, then circulating fan, heating pipes and air valves will work together for rapid heating. With the help of circulation fan, the dry hot air flows into chamber by way of high temperature resistant HEPA and forms uniform air flow. The moisture on the surface of the articles is taken away by dry hot air and then is discharged out of chamber. When chamber temperature reaches a certain value, the exhaust valve is closed. The dry hot air circulates in the chamber. With the intermittent fresh air intake, the chamber has positive pressure. After sterilization phase is ended, fresh air or cooling water inlet valve is open for cooling. When temperature drops to the set value, automatic valves close, and an audible and visual alarm is given for indication of opening door.