DOUBLE PISTON EFFECT LIP SEAL SEATING ASSEMBLIES
First Claim
1. A valve comprising:
- a hollow valve body;
a ball disposed in a cavity of the hollow valve body, wherein the ball includes a flow port and is rotatable for controlling flow through the valve; and
a seat assembly including a seat in contact with the ball, a ring positioned on an opposite side of the seat from the ball, and unidirectional lip seals, wherein the seat assembly is a double piston effect seat assembly and the seat, the ring, and the unidirectional lip seals are positioned with respect to one another for providing the double piston effect.
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Accused Products
Abstract
A valve including a double piston effect seat assembly with unidirectional lip seals is provided. In one embodiment, a valve includes a ball disposed in a cavity of a hollow valve body. The ball includes a flow port and is rotatable to control flow through the valve. The valve also includes a seat assembly having a seat in contact with the ball, a ring positioned on an opposite side of the seat from the ball, and unidirectional lip seals. The seat assembly is a double piston seat assembly, with the double piston effect provided by the arrangement of the seat, the ring, and the unidirectional lip seals. Additional valve systems, devices, and methods are also disclosed.
73 Citations
15 Claims
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1. A valve comprising:
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a hollow valve body; a ball disposed in a cavity of the hollow valve body, wherein the ball includes a flow port and is rotatable for controlling flow through the valve; and a seat assembly including a seat in contact with the ball, a ring positioned on an opposite side of the seat from the ball, and unidirectional lip seals, wherein the seat assembly is a double piston effect seat assembly and the seat, the ring, and the unidirectional lip seals are positioned with respect to one another for providing the double piston effect. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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receiving fluid in a ball valve disposed between first and second sections of a fluid conduit, the ball valve including a ball disposed in a valve body and a seat that seals against the ball; and maintaining sealing of the seat against the ball during operation of the ball valve using a double piston effect seat assembly installed in a recess of a valve component, the double piston effect seat assembly including the seat, a piston ring, and first and second lip seals oriented in opposite directions. - View Dependent Claims (14, 15)
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Specification