Patent ID: 8528880
Filing Date: 2013-09-10
Classification: F16J,F16K

Abstract:
1. A butterfly valve plate sealing assembly comprising: a plate having a first outer diameter surface and an annular groove, the annular groove formed in an outer periphery of the plate and including an opening section and a cavity section, the opening section extending from the first outer diameter surface to the cavity section; a sealing ring having a radial ring section and an axial ring section, the radial ring section extending through the opening section of the annular groove into the cavity section of the annular groove, the axial ring section disposed in the cavity section of the annular groove and extending axially from the radial section toward a surface defining the cavity section of the annular groove, the axial ring section including a second outer diameter surface and a contact face, the contact face adjacent to the surface defining the cavity section and including a contact surface and an annular channel, the contact surface configured to contact the surface defining the cavity section and located radially outward relative to the annular channel, the annular channel forming a gap between the surface defining the cavity section and at least a portion of the contact face; and a retention spacer positioned adjacent the sealing ring and within the opening section of the annular groove.