Rotary airlocks or rotary valves are commonly used in industrial and agricultural applications as a component in a bulk or specialty material handling system. Rotary Valves are primarily used for discharge of bulk solid material from hoppers/bins, receivers; Rotary airlock feeders are used in wide application in industry wherever dry free-flowing powders, granules, crystals, or pellets are used. Typical materials include: cement, ore, sugar, minerals, grains, plastics, dust, fly ash, flour, gypsum, lime, coffee, cereals, pharmaceuticals, etc.

Rotary valves are available with square or round inlet and outlet flanges. Housing can be fabricated out of sheet material or cast. Common materials are cast iron, carbon steel, SS 304, SS 316, and other materials.