SED-75DG-B — Vacuum Freeze Dryer

Product is loaded onto the stainless-steel shelves and the chamber is evacuated to the target vacuum level. The refrigeration system(Bitzer compressors) chills the cold trap to capture sublimated water vapor. Shelves are heated(electrical, PID-controlled) to provide the heat of sublimation; the Siemens PLC maintains programmed temperature and vacuum profiles throughout primary and secondary drying stages. Multiple vacuum setpoints can be executed automatically within a single cycle. After drying, the cold trap is defrosted by the dedicated defrost-water inlet; the chamber is back-filled to atmospheric pressure before unloading.