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 being at least partially formed in the outer surface to a prescribed length therein and extending in generally parallel relation to the axis of the bore, each of the flow paths further defining a single, dedicated feed opening and a single, dedicated outlet opening which fluidly communicates with the bore;
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.
27 Citations
20 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 being at least partially formed in the outer surface to a prescribed length therein and extending in generally parallel relation to the axis of the bore, each of the flow paths further defining a single, dedicated feed opening and a single, dedicated outlet opening which fluidly communicates with the bore; 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)
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13. 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 are each at least partially formed in the outer surface to a prescribed length therein and extend in generally parallel relation to the axis of the bore, each of the resistance paths being in fluid communication with a single, dedicated path inlet opening and a single, dedicated path discharge opening which each fluidly communicate with the bore; 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 (14, 15, 16, 17, 18, 19, 20)
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Specification