Abstract: The specification discloses a flange valve having a metal valve body with a longitudinal central passage therethrough and annular flanges extending outwardly from the ends thereof. A truncated ellipsoid valve member is located in the central portion of the passage, the ellipsoid member having major and minor axes and being truncated at the opposite ends of the major axes. An aperture is formed through the ellipsoid member along the major axis. Annular resilient seats are disposed on opposing sides of the valve member to provide sealing between the interior of the valve body and the exterior of the valve member. A pair of removable annular liners are dimensioned to closely fit within opposite ends of the central passage of the valve body and include end portions abutting the resilient seats. The liners are constructed from non-corrosive material to prevent corrosion of the valve body.

Abstract: The specification discloses a flange valve having a metal valve body with a longitudinal central passage therethrough and annular flanges extending outwardly from the ends thereof. A truncated ellipsoid valve member is located in the central portion of the passage, the ellipsoid member having major and minor axes and being truncated at the opposite ends of the major axes. An aperture is formed through the ellipsoid member along the major axis. Annular resilient seats are disposed on opposing sides of the valve member to provide sealing between the interior of the valve body and the exterior of the valve member. A pair of removable annular liners are dimensioned to closely fit within opposite ends of the central passage of the valve body and include end portions abutting the resilient seats. The liners are constructed from non-corrosive material to prevent corrosion of the valve body.

Abstract: The specification discloses a valve including a valve body with a longitudinal central passage therethrough. A truncated ellipsoid valve member is located within the central passage of the valve body. The ellipsoid member has major and minor axes and has an aperture extending along the major axis thereof. Annular resilient seats are disposed in contact with opposite end portions of the ellipsoid member. A handle is provided to rotate the ellipsoid member between open and closed positions. In the open position, the aperture through the ellipsoid member is aligned with the central passage of the valve body and the ellipsoid member causes deformation of the resilient seats to prevent leakage of fluid around the exterior of the ellipsoid member.