Airlock rotary valves are mechanical devices used in pneumatic conveying systems to control the flow of bulk materials while maintaining an airtight seal and preventing air leakage. They consist of a rotor with vanes or blades that rotate within a housing, creating chambers between the rotor blades. As the rotor turns, these chambers alternately fill with material from an inlet and discharge the material through an outlet. The rotation of the rotor ensures a continuous flow of material while preventing air from leaking back into the system. Airlock rotary valves are commonly used in industries such as food processing, agriculture, pharmaceuticals, and chemical manufacturing to meter and transfer bulk solids, powders, granules, and pellets. They offer benefits such as reliable operation, minimal maintenance, high efficiency, and the ability to handle a wide range of materials and operating conditions. Overall, airlock rotary valves play a crucial role in pneumatic conveying systems by facilitating efficient material transfer while maintaining air pressure differentials and preventing contamination.