... for Sand Washing and Grading machine 1. Operating PrincipleDrum screen consists of motor, decelerator, rotordrive, chassis, seal ... ) Large processing capacities3) Smooth running, low noise4) Longer screen life and less blocking6) CE certification 3. Applicable Industry ... Construction of material: carbon steel, mild steel, stainless steel2) Trommel screen type: sealed type, open type3) Drum type: round, ...