Diablo (L) are designed especially for screw cleaning, without disassembling the screw. Screws for extrusion, screws from injection molding are cleaned in a low oxygen environment. Cycle time is 1,5 to 4 hours. The screw cleaning equipment is available from 2 up to 7 meter. The door is operated pneumatically, a postcombustion is integrated in the compact design to meet environmental standards