Axial resistance valve trim design
First Claim
Patent Images
1. A multi-stage control valve, comprising:
- a valve body;
a flow control element disposed within the valve body and including;
a cage having an outer surface and an inner surface at least partially defining a bore which extends therethrough along an axis; and
a plurality of flow paths, each of the flow paths having opposed ends, being at least partially formed in the outer surface to a prescribed length therein and extending along the axis of the bore, each of the flow paths further defining a single, dedicated feed opening which is proximate one of the opposed ends and a single, dedicated outlet opening which is proximate the remaining one of the opposed ends, each flow path being in communication with the bore only at the single, dedicated outlet opening; and
a sleeve plug reciprocally movable along the axis in a manner which allows for selective variations in a portion of the cage, and a number of feed openings of the flow paths, covered thereby.
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Accused Products
Abstract
A control valve which includes a discrete, multi-stage, multi-path valve trim, located in concentric cylinders, along the outlet axis of the valve, with potential to characterize flow resistance at different opening points.
37 Citations
22 Claims
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1. A multi-stage control valve, comprising:
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a valve body; a flow control element disposed within the valve body and including; a cage having an outer surface and an inner surface at least partially defining a bore which extends therethrough along an axis; and a plurality of flow paths, each of the flow paths having opposed ends, being at least partially formed in the outer surface to a prescribed length therein and extending along the axis of the bore, each of the flow paths further defining a single, dedicated feed opening which is proximate one of the opposed ends and a single, dedicated outlet opening which is proximate the remaining one of the opposed ends, each flow path being in communication with the bore only at the single, dedicated outlet opening; and a sleeve plug reciprocally movable along the axis in a manner which allows for selective variations in a portion of the cage, and a number of feed openings of the flow paths, covered thereby. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A multi-stage control valve, comprising:
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a valve body; and a flow control element disposed within the valve body and including; an inlet element defining an inner chamber and a plurality of inlet openings which each fluidly communicate with the inner chamber; and a resistance element having an outer surface and an inner surface at least partially defining a bore which extends therethrough along an axis, the resistance element defining a plurality of resistance paths which each have opposed ends, are each at least partially formed in the outer surface to a prescribed length therein and extend along the axis of the bore, each of the resistance paths being in fluid communication with a single, dedicated path inlet opening which is proximate one of the opposed ends and a single, dedicated path discharge opening which is proximate the remaining one of the opposed ends and fluidly communicates with the bore, each resistance path being in communication with the bore only at the single, dedicated path discharge opening; the inlet element being reciprocally movable along the axis in a manner which allows for selective variations in a number of the inlet openings covered by the resistance element and selective variations in a number of the path inlet openings covered by the inlet element. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification