Industrial Vacuum Freeze Dryer 4m² Freeze Drying Machine with 14 Trays for Food Production Industrial Vacuum Dryer Parameter Stronger refrigeration capacity: two compressors work together, more refrigeration power, faster refrigeration. Higher system stability: Each compressor in the dual compressor system has an independent control system and protection device. Powerful cooling performance, lower final temperature, and higher drying efficiency. Model HFD-40 Tray space 4m2