VALVE SEAL ASSEMBLY WITH RELIEF VOLUME

摘要

An exemplary valve seal assembly is provided that includes a valve body with one or more relief volumes that may extend circumferentially and positioned in or adjacent one or both an upper and lower member of the valve body. A compression seal positioned adjacent an opening of a relief volume and a seal that is provided primarily in a volume between the upper and lower members. In an uncompressed state, the compression seal is maintained adjacent the opening of the relief volume. In a compressed state when the valve seal assembly compressively engages a valve seat, the compression seal is compressed against the relief volume, and may be either fully or partially compressed into the relief volume. A relief volume primary angle may be provided at a desired angle, and a seal retention volume primary angle may be provided at a desired angle.

主权项

1. A valve seal assembly having a relief volume, the valve seal assembly comprising:
a valve body that includes:
an upper portion that includes an upper member that extends circumferentially;a lower portion that includes a lower member that extends circumferentially, and wherein the lower member includes a strike angle portion that extends circumferentially and is operable to circumferentially contact a strike face of a valve seat when, in operation, the valve seal assembly engages the valve seat;a seal retention volume that extends circumferentially and is defined generally by the volume between an upper member seal surface of the upper member and a lower member seal surface of the lower member, and that includes a relief volume having an opening and that extends circumferentially and is defined generally by the volume that is adjacent a portion of one or both of the upper member seal surface of the upper member and the lower member seal surface of the lower member; a compression seal that extends circumferentially and is positioned in the seal retention volume at least partially adjacent the opening of the relief volume; wherein the compression seal includes a primary cross-sectional length that is greater than or equal to a height of the opening of the relief volume; and a seal that extends circumferentially and is positioned at least partially in the seal retention volume adjacent and in contact with the compression seal, the seal having an external surface with at least a portion of the external surface provided as a seal strike surface that extends circumferentially and is operable to circumferentially contact the strike face of the valve seat when the valve seal assembly compressively engages the valve seat to compress the seal, and wherein the compression seal is operable to at least partially compress or deform and at least partially extend into the relief volume through the opening when a force from the adjacent seal is applied to the compression seal in response to the seal being compressed.