Fluid flow control valve with composition seal
AssigneeFisher Controls International LLC
InventorGary Witt
Life of this patent
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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.
Claims23
A valve, comprising:
- a housing having an inlet and an outlet in fluid communication with a bore therethrough, the bore defining a primary flowpath;
- a ball element mounted in the housing and adapted to move between a closed position, fluidically disconnecting the inlet from the outlet, to an open position, fluidically connecting the inlet and outlet;
- and
- a seal assembly disposed within the housing, the seal assembly comprising a seal housing and a biased main seal, wherein the biased main seal includes an insert that engages the ball element during the opening and closing of the valve.
A valve, comprising:
- a housing having an inlet and an outlet in fluid communication with a bore therethrough, the bore defining a primary fluid flowpath;
- a seal assembly including a main seal and a seal housing, the seal assembly including a secondary flowpath therethrough;
- and
- a ball element mounted proximate to the seal assembly, wherein the ball element moves in a rotary motion relative to the seal assembly to rotatably engage an insert in the main seal during the opening and closing of the valve.
A method of operating a valve, comprising:
- providing a valve body having an inlet, an outlet and a seal assembly, wherein the seal assembly comprises a main seal, a secondary seal, and a seal housing;
- inserting an insert into an annular groove disposed at an end of the main seal;
- biasing the main seal toward a ball element;
- controlling a first flow through the valve by rotating a ball element mounted to the valve body into and out of engagement with the insert;
- and
- impeding a second fluid flow through the a secondary seal.
The method of operating a valve of claim. 21, wherein securing the insert includes forcing a wall of the groove over a ledge on the insert.
Dependencies are inferred from the claim text.