AIRLANCO Airlocks are available in customized fabricated and machined models for pneumatic systems, gravity feeds and volumetric discharge devices. Fabricated models handle dust collection, plastics, feeds and corrosive chemicals where pressure differentials are 20 in. of water column or less. Urethane wipers provide a tight fit between fabricated rotors and housings. AIRLANCO Machined Airlocks have cast housings for added durability and are designed for higher pressures as well as difficult and abrasive materials. Rotor to housing fit is a tight 4 to 6 thousandths of an inch. Both models offer carbon and stainless steel rotor and housing options.