High Capacity DRY Screw Vacuum Pump with integrated High Vacuum; Roots and exclusive Built-in Safety Flap Valve. Quick release flange; Connection on vacuum main duct, for easy inspection; Over size colour Touch Screen. High Vacuum Group Capacity; Patented 1000 m3/h. Optimized combination of Dry Screw Pump and; Roots for a constant efficiency from 1000 to 1 mbar (absolute pressure).