All carbon steel construction. Open-end rotor w/ beveled tips. Feed rate: 0.23 cu ft per revolution. 12.0" valve height. Direct drive right-angle worm gear. Motor info: 0.5hp, 208-230/460v, 60hz, 3ph. The DDV Dust Duty Valves are designed to provide a low cost airlock solution for simple dust collection under baghouses and cyclones. This design is uniquely suited for low pressure applications in light duty non-abrasive dust collection. Shipping info: one skid, 214 lbs, 32" W x 48" L x 25" H.