Rotary airlocks valves, are commonly used in industrial and agricultural applications as a component in a bulk or specialty material handling system. Rotary Air Lock Valves are primarily used for discharge of bulk solid material from hoppers/bins, receivers, and cyclones into a pressure or vacuum-driven pneumatic conveying system. Components of a rotary feeder include a rotor shaft, housing, head plates, and packing seals and bearings. Rotors have large vanes cast or welded on and are typically driven by small internal combustion engines or electric motors