The Gericke HDMF 200 rotary valve is an airlock and metering device for powders, granules, pellets, chips, grain and other products. The valve features the Rota-lign system that permits fast, easy valve disassembly without tools for complete cleaning and visual inspection. Set in the non-drive end of the rotary valve, the Rota-lign bearing assembly uses a self-aligning rotor design with tapered bore and guide rails that allows the rotor to be accessed and cleaned without removal from the end cover and the bearings to be replaced without removing the valve from the processing line. The rotary valve with the Rota-lign system is USDA-certified for specification and installation in sanitary processes.