Valve trim
First Claim
1. A valve trim body for a flow control valve, wherein said flow control valve has a body with a passage extending therethrough, said body having a seat formed therein, a plug movable relative to said seat, said valve trim body forming a cage around said plug and comprising:
- a plurality of perforated plate means stacked together, each of said plate means being generally ring-shaped, having inner and outer edges and having hole patterns formed therein whereby fluid flowing between said inner and outer edges must flow through one of a plurality of tortuous paths, each of which includes at least two of said plates, andwherein said hole pattern on each plate is a repeating pattern of four offset holes wherein the first of said four holes communicates with and opens into said inner edge of said plate, the second hole is angularly aligned with said first hole, and said second hole does not open into said inner or said outer edge, the third hole and fourth holes are each offset angularly and radially with respect to said first and second holes, said third and fourth holes are angularly aligned with each other, said third hole does not open into said inner or outer edge, and said fourth hole communicates with and opens into said outer edge of said plate, and each repeating pattern on a single plate is separated by a region without perforations.
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Accused Products
Abstract
A valve trim is provided for a flow control valve wherein a plurality of perforated plates are stacked together. Each plate has a series of hole patterns formed therein, including a repeating pattern of four offset rectangular holes. As the plates are assembled, each plate is rotated in the same direction so that the hole patterns create tortuous pathways that include multiple episodes of change of direction, sudden contraction and sudden expansion of the high pressure fluid as well as forcing the fluid to flow through two or more of the plates.
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Citations
7 Claims
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1. A valve trim body for a flow control valve, wherein said flow control valve has a body with a passage extending therethrough, said body having a seat formed therein, a plug movable relative to said seat, said valve trim body forming a cage around said plug and comprising:
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a plurality of perforated plate means stacked together, each of said plate means being generally ring-shaped, having inner and outer edges and having hole patterns formed therein whereby fluid flowing between said inner and outer edges must flow through one of a plurality of tortuous paths, each of which includes at least two of said plates, and wherein said hole pattern on each plate is a repeating pattern of four offset holes wherein the first of said four holes communicates with and opens into said inner edge of said plate, the second hole is angularly aligned with said first hole, and said second hole does not open into said inner or said outer edge, the third hole and fourth holes are each offset angularly and radially with respect to said first and second holes, said third and fourth holes are angularly aligned with each other, said third hole does not open into said inner or outer edge, and said fourth hole communicates with and opens into said outer edge of said plate, and each repeating pattern on a single plate is separated by a region without perforations. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification