Cam valve self-centering seat
AssigneeFisher Controls International LLC
InventorsRonald R. Brestel, Dale L. Meyer
Life of this patent
Estimating the term…
Abstract
A fluid valve capable of operation in high pressure, bidirectional flowpaths includes a chamber having a circular port in which an axially and radially movable seat ring is engaged by an eccentrically movable valve plug having a spherically convex sealing surface. The plug is mounted to a valve shaft supported in the body for rotation about an axis transverse to, but offset from, the centerline of the port. The seat ring, body and a retainer ring include among them a pair of annular channels for retaining a pair of seals adapted for improving their sealing action with pressure.
Claims19
A fluid valve comprising:
- a body including a valve chamber defining a flowpath;
- a valve shaft extending into said body;
- a valve plug, having a spherically convex sealing surface, rotatably mounted in said body for limited eccentric movement about an axis in response to the movement of said valve shaft;
- an annular seat ring adapted for sealing engagement with the sealing surface of said valve plug to block said flowpath;
- means mounting said seat ring in said body for limited movement of the center of said annular seat ring axially to and transversely of said valve plug such that said valve plug tends to center said seat ring during closure of said valve;
- and
- sealing means sealing the periphery of said seat ring and said body against fluid leakage.
A fluid valve comprising:
- a body including a valve chamber defining a generally circular fluid port establishing a first axis in said chamber;
- bearing means in said body defining a second axis in said chamber perpendicular to and offset from said first axis;
- a valve shaft rotatably mounted in said bearing means and extending outside said body;
- a valve plug having a spherically convex sealing surface mounted to said valve shaft for limited eccentric movement about said second axis toward and away from said port responsive to movement of said valve shaft;
- an annular seat ring adapted for sealing cooperation with the spherically convex sealing surface of said valve plug to block fluid flow through said port;
- means supporting said annular seat ring for limited movement both axially along and transversely of said first axis of said port such that said valve plug tends to center said annular seat ring during closure of said valve;
- and
- pressure sealing means between said annular seat ring and said body for blocking fluid leakage.
A fluid valve adapted for bidirectional high pressure fluid flow comprising:
- a body including a valve chamber defining a generally circular fluid port establishing a first axis in said chamber along the centerline of said port;
- a pair of bearings in said body defining a second axis transverse to and offset from said first axis;
- a valve shaft mounted for rotation in said bearings responsive to externally applied forces;
- a valve plug having a spherically convex sealing surface mounted to said valve shaft, said valve plug being offset for limited eccentric movement about said second axis for opening and closing said fluid port;
- an annular seat ring adapted for sealing cooperation with the spherically convex sealing surface of said plug to block fluid flow in either direction through said port;
- means mounting said seat ring in said body for limited movements parallel to and transverse of the centerline of said valve plug when in its closed position such that said valve plug tends to center said seat ring during closure of said valve;
- and
- sealing means sealing the periphery of said seat ring from fluid leakage in either direction in said valve chamber.
Dependencies are inferred from the claim text.