Seal cartridge control valve
AssigneeDresser, Inc.
InventorBrian J. Caprera
Life of this patent
Estimating the term…
Abstract
A flexible seal ring includes a first sealing face and a rear face is disposed opposite the front sealing face, the rear face is axially offset relative to the front sealing face. An upper face disposed between the front face and the rear face, the upper face extending from the rear face towards the front face such that an interior angle between the upper face and the rear face is greater than 110 degrees. Another flexible seal ring includes a first front sealing face, a rear face, at least one downwardly disposed upper face disposed between the front face and the rear face, at least one downwardly disposed lower face, and a second front sealing face disposed between the downwardly disposed lower face and the first front sealing face. A cartridge seal includes a flexible seal ring and an upper retaining ring.
Claims22
A seal cartridge for sealing an outer surface of a plug to an inner wall of a cage in a control valve, the seal cartridge comprising:
- a flexible seal ring disposed in a seal groove, said flexible seal ring including:
- a first front sealing face adapted for sealing contact with the outer surface of the plug or with the inner wall of the cage,
- a rear face,
- at least one upper face disposed downwardly with respect to an up direction from which energizing fluid pressure is in use applied to the flexible seal ring upper face, said upper face being disposed between the first front sealing face and the rear face,
- at least one lower face, disposed downwardly with respect to said up direction, and
- a second front sealing face disposed upwardly with respect to said up direction between the downwardly disposed lower face and the first front sealing face;
- and
- an upper retaining ring disposed adjacent to the flexible seal ring, said upper retaining ring including:
- at least one lower face disposed downwardly with respect to said up direction and proximal to the downwardly disposed upper face of the flexible seal ring;
- wherein said at least one upper face of the flexible seal ring is adapted to flex away from the at least one downwardly disposed lower face of the upper retaining ring, and said lower face of the flexible seal ring is adapted to flex downward upon the application the energizing fluid pressure to the flexible seal ring upper face.
A control valve including an inlet port, an outlet port, a plug movably disposed in a cage, and a seal cartridge for sealing an outer surface of the plug to an inner wall of the cage, the seal cartridge comprising:
- a flexible seal ring disposed in a seal groove, said flexible seal ring including:
- a first front sealing face adapted for sealing contact with the outer surface of the plug or with the inner wall of the cage,
- a rear face,
- at least one upper face, disposed downwardly with respect to an up direction from which energizing fluid pressure is in use applied to the flexible seal ring upper face, said face being disposed between the first front sealing face and the rear face, and
- at least one lower face,
- a second front sealing face disposed upwardly with respect to said up direction between the downwardly disposed lower face and the first front sealing face;
- an upper retaining ring disposed adjacent to the flexible seal ring, said upper retaining ring including:
- at least one lower face disposed downwardly with respect to said up direction and proximal to the downwardly disposed upper face of the flexible seal ring;
- wherein said at least one upper face of the flexible seal ring is adapted to flex away from the at least one downwardly disposed lower face of the upper retaining ring, and said lower face of the flexible seal ring is adapted to flex downward upon the application the energizing fluid pressure to the flexible seal ring upper face.
A seal cartridge for sealing an outer surface of a plug to an inner wall of a cage in a control valve, the seal cartridge comprising:
- a flexible seal ring disposed in a seal groove, said flexible seal ring including:
- a first front sealing face adapted for sealing contact with the outer surface of the plug or with the inner wall of the cage,
- a rear face,
- at least one upper face, with respect to an up direction from which energizing fluid pressure is in use applied to the flexible seal ring upper face, the at least one upper face being disposed between the first front sealing face and the rear face,
- at least one lower face, and
- a second front sealing face disposed between the lower face and the first front sealing face;
- and
- an upper retaining ring disposed adjacent to the flexible seal ring, said upper retaining ring including:
- at least one lower face disposed downwardly with respect to said up direction and proximal to the downwardly disposed upper face of the flexible seal ring;
- a lower retaining ring disposed adjacent to the flexible seal ring, said lower retaining ring including:
- at least one upper face disposed proximal to the downwardly disposed lower face of the flexible seal ring,
- wherein said lower face of the flexible seal ring is adapted to flex toward the at least one upper face of the lower retaining ring;
- a split ring seal element disposed in a recess in a portion of the first lower retaining ring that is disposed toward the plug,
- wherein the cartridge seal is configured to be disposed in a seal groove in the wall of the cage and wherein said second front sealing face of the flexible seal ring is adapted to flex toward the plug;
- and
- wherein said at least one upper face of the flexible seal ring is adapted to flex away from the at least one downwardly disposed lower face of the upper retaining ring, and said lower face of the flexible seal ring is adapted to flex downward upon the application the energizing fluid pressure to the flexible seal ring upper face.
Dependencies are inferred from the claim text.