All carbon steel construction. Open-end rotor w/ beveled tips. Feed rate: 0.9 cu ft per revolution. 18.25" valve height. Direct drive right-angle worm gear, motor info: 1hp, 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 projects. Shipping info: 472 lbs. 47"W x 48"L x 32"H. 1 skid.