Rotary valve and rotary valve seal

摘要

A rotary valve (10) includes a housing (12) including an inlet (14) and an outlet (16). A drum (18) is rotatably located in the housing and includes one or more fluid pathways (24) to convey fluid flow between the inlet and the outlet. The rotary valve further includes a single-piece unitary drum seal (34) having a portion located around a perimeter of a port (26) of the one or more fluid pathways to seal between the drum and the housing. A drum seal assembly (32) for a rotary valve includes a single piece, unitary drum seal (34) disposed at a drum of the rotary valve. The drum seal has a portion extending around a perimeter of a port of one or more fluid pathways of the drum to seal between the drum and an inner wall of a housing. The drum seal assembly further includes an energizer (36) to urge the drum seal (34) into contact with the housing (12).