Abstract: A control valve of the ball type is disclosed. The valve includes a housing having an inlet and an outlet in fluid communication with a bore that defines a primary flowpath. A ball element is mounted in the housing and is adapted to move between a closed position, fluidically disconnecting the inlet from the outlet, and an open position, fluidically connecting the inlet and outlet. A seal assembly is disposed within the housing and includes a seal housing and a biased main seal. The biased main seal includes an insert that engages the ball element during the opening and closing of the valve.

Abstract: Fluid valve control members having contoured sealing surfaces and methods of making the same are disclosed. An example fluid valve control member includes a body portion having a sealing surface configured to engage a sealing ring within a fluid control valve. A first portion of the sealing surface has a first spherical radius with respect to a first point along a centerline of the body portion and a second portion of the sealing surface has a second spherical radius with respect to a second point along the centerline of the body portion. The first and second points are offset from each other and the second spherical radius is sized to be smaller than the first spherical radius to form a substantially seamless transition between the first and second portions of the sealing surface.