Seal assembly

A valve comprising:

• a housing defining a valve chamber defining a longitudinal axis, an inlet adjoining the valve chamber, a primary outlet adjoining the valve chamber, and;
• a valve member disposed within the valve chamber and supported for rotation about a longitudinal axis of the valve chamber, the valve member and the housing defining a clearance therebetween;
• and
• a seal assembly comprising a first component and a second component spaced apart from the first component so as to define a passage for the transfer of fluid from an inlet of the seal assembly to an outlet of the seal assembly,
• wherein:
• the first component comprises a concavity at least partially defining the passage, and wherein no part of the second component extends into the portion of the passage bounded by the concavity,
• the housing comprises one of the first component of the seal assembly and the second component of the seal assembly,
• the valve member comprises the other of the first component of the seal assembly and the second component of the seal assembly,
• the clearance comprises the passage of the seal assembly,
• the valve further comprises a secondary outlet adjoining the valve chamber, the valve member comprises:
• a first end wall positioned at a first longitudinal end of the valve member,
• a second end wall positioned at a second longitudinal end of the valve member opposite the first end wall of the valve member, and
• a web extending between the first and second end walls, and
• the first end wall is received by a first end cap having a first longitudinally extending shaft, and wherein the second end wall is received by a second end cap having a second longitudinally extending shaft, the shafts being aligned with the longitudinal axis of the housing and being configured to support the valve member for rotation within the valve chamber.