The Airex Industries line of rotary airlocks are designed to control the flow of discharge material from a dust collector, or other type of process, by maintaining an air seal.
The discharge falls from the hopper into the rotary airlock. Paddle wheels with rubber extensions to keep the system hermetically sealed collect the discharge. A motor drive rotates the paddle wheels at a specified speed and eventually the particles are evacuated from the bottom of the system without breaking the air seal.