System, method and apparatus for split gate valve with mechanically isolated seal surfaces
First Claim
1. A split gate valve, comprising:
- a body having a fluid aperture extending therethrough along a fluid axis, and a valve axis perpendicular to the fluid axis;
a pair of valve seats mounted in the body along the fluid axis and on opposite sides of the valve axis;
a split gate movably mounted within the body along the valve axis between the valve seats, the split gate having a pair of gates, each with a hole, the split gate being movable between an open position wherein the holes register with the fluid aperture and the valve seats to permit fluid flow therethrough, and a closed position wherein the holes do not register with the fluid aperture and the valve seats to prevent fluid flow therethrough; and
a gate guide located in the body and in contact with the split gate for moving the pair of gates with respect to the valve seats along the fluid axis as the pair of gates moves along the valve axis relative to the gate guide between the open position and the closed position, such that the gate guide forces the pair of gates apart along the fluid axis and into contact with the valve seats in both the open and closed positions, and the pair of gates have axial play along the fluid axis when the split gate is between the open and closed positions.
1 Assignment
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Accused Products
Abstract
A split gate is movably mounted within a valve body along a valve axis between valve seats. The split gate has gates, each extending between one of the valve seats and the other gate. In an open position, gate holes register with a fluid aperture and the valve seats to permit fluid flow. In the closed position, the holes do not register with the fluid aperture to prevent fluid flow. The split gate valve also has a gate guide located in the body for moving the gates with respect to the valve seats along the fluid axis. The gate guide forces the pair of gates apart along the fluid axis and into contact with the valve seats in both the open and closed positions. The gates have axial play along the fluid axis when the split gate is between the open and closed positions.
39 Citations
25 Claims
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1. A split gate valve, comprising:
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a body having a fluid aperture extending therethrough along a fluid axis, and a valve axis perpendicular to the fluid axis; a pair of valve seats mounted in the body along the fluid axis and on opposite sides of the valve axis; a split gate movably mounted within the body along the valve axis between the valve seats, the split gate having a pair of gates, each with a hole, the split gate being movable between an open position wherein the holes register with the fluid aperture and the valve seats to permit fluid flow therethrough, and a closed position wherein the holes do not register with the fluid aperture and the valve seats to prevent fluid flow therethrough; and a gate guide located in the body and in contact with the split gate for moving the pair of gates with respect to the valve seats along the fluid axis as the pair of gates moves along the valve axis relative to the gate guide between the open position and the closed position, such that the gate guide forces the pair of gates apart along the fluid axis and into contact with the valve seats in both the open and closed positions, and the pair of gates have axial play along the fluid axis when the split gate is between the open and closed positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A split gate valve, comprising:
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a body having a fluid aperture extending therethrough along a longitudinal fluid axis, and a valve axis perpendicular and transverse to the fluid axis; a pair of valve seats mounted in the body along the fluid axis and on opposite sides of the valve axis; a split gate movably mounted within the body along the valve axis between the valve seats, the split gate having a pair of gates, each with a hole, the split gate being movable between an open position wherein the holes register with the fluid aperture and the valve seats to permit fluid flow therethrough, and a closed position wherein the holes do not register with the fluid aperture and the valve seats to prevent fluid flow therethrough; a silt barrier located between the pair of gates and coaxially aligned with the holes in the gates, such that each gate is located between one of the valve seats and the silt barrier; a hand wheel and stem mounted to the body for manually moving the split gate, the hand wheel and stem extending along and rotatable about the valve axis, and coupled to the split gate for manually moving the split gate between the open and closed positions; and a gate guide located in the body and in contact with the split gate for moving the pair of gates with respect to the valve seats along the fluid axis as the split gate moves along the valve axis relative to the gate guide between the open position and the closed position, such that the gate guide forces the pair of gates apart along the fluid axis and into contact with the valve seats in both the open and closed positions, and the pair of gates have axial play along the fluid axis when the split gate is between the open and closed positions. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A split gate valve, comprising:
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a body having a fluid aperture extending therethrough along a longitudinal fluid axis, and a valve axis perpendicular and transverse to the fluid axis; a pair of valve seats mounted in the body along the fluid axis and on opposite sides of the valve axis; a split gate movably mounted within the body along the valve axis between the valve seats, the split gate having a pair of gates, each with a hole, the split gate being movable between an open position wherein the holes register with the fluid aperture and the valve seats to permit fluid flow therethrough, and a closed position wherein the holes do not register with the fluid aperture and the valve seats to prevent fluid flow therethrough; a silt barrier located between the pair of gates and coaxially aligned with the holes in the gates, such that each gate is located between one of the valve seats and the silt barrier; a hand wheel and stem mounted to the body for manually moving the split gate, the hand wheel and stem extending along and rotatable about the valve axis, and coupled to the split gate for manually moving the split gate between the open and closed positions; a gate guide located in the body and in contact with the split gate for moving the pair of gates with respect to the valve seats along the fluid axis, such that the gate guide forces the pair of gates apart along the fluid axis and into contact with the valve seats in both the open and closed positions, and the pair of gates have axial play along the fluid axis when the split gate is between the open and closed positions; the split gate having a lateral side located adjacent the body and laterally spaced apart from both the fluid axis and the valve axis, and a recess is formed in the lateral side of the split gate for receiving the gate guide, and the recess comprises a slot extending in a direction of the valve axis, the slot having at leak one opening wedge for engaging the gate guide to bias the pair of gates along the fluid axis when the split gate is in the open position, and at least one closing wedge for engaging the gate guide to bias the pair of gates along the fluid axis when the split gate is in the closed position. - View Dependent Claims (23, 24, 25)
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Specification