Title: Rotary valve apparatus

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Abstract: A rotary valve apparatus suitable for transporting particulate solid materials from one pressure region to another pressure region, each pressure region may be at different operating temperatures. The apparatus includes a stationary housing defining a generally cylindrical shaped chamber with inlet and outlet openings; end walls enclosing the cylindrical chamber; an elongated shaft journaled centrally within the housing and end walls; and a plurality of vanes affixed to the shaft. The vanes are in communication with the walls of the cylindrical chamber to form a seal. The seal between the vane and cylindrical chamber wall is effectuated by a vane blade which is affixed to each vane. Vane blades are constructed using a metal blade partially sandwiched between an elastomer material, the exposed portion of metal blade is in a sealing engagement with the walls of the cylindrical chamber. At the end of the vanes are shrouds which, in cooperation with the vane, form pockets. Sealing between the pockets and the end walls is accomplished by placing a resilient packing around the cylindrical chamber in between the shrouds and end walls.


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