Rotary airlocks are also usually known as rotary vane feeders, Rotary valves. It features a small and efficient form mechanical equipment for continuously discharging bulk powders gradually into the method of a plant. It functions as a where the, Metering device discharge capacity of a process plant is set by this rotary valves. There is only one a multi, Vane rotor, Moving part revolves in very close contact of housing it comes with one inlet at the top and one outlet at the bottom. The discharge capacity is contingent upon the volume of rotor the no, S pocket of revolutions of rotor in a minute & the bulk density of process, Material. The word airlock it means that device is work as a lock the air between the incoming and outgoing connections ports while moving material in a continuous rotating motion through its pockets. Material travels downwards but air flow is restricted. It will be transferred from inlet to the pneumatic conveying system. The application & uses of ral has different means in multiple fields around the world, Therefore Numerous choices exist types of rals accordingly.