Low recovery rotary control valve
First Claim
Patent Images
1. A rotary control valve for controlling fluid flow through a conduit comprising:
- a plug element rotatable in the conduit having a plurality of ducts extending through the plug from a first face to a second face and at least one transverse duct communicating between at least two of the plurality of ducts, the transverse duct and the said two ducts defining fluid flow paths therethrough, the average cross sectional area of the flow path of the transverse duct being less than the average cross sectional area of the flow paths of the said two ducts;
a first trim element located in the conduit abutting the plug, having a plurality of ducts extending from an outside face to an inside face, the inside face being dimensioned to closely conform to the first face of the plug; and
wherein the location and dimension of the ducts on the inside trim face coincide with the location and dimension of the ducts on the first plug face.
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Accused Products
Abstract
A rotary control valve for controlling fluid flow through a conduit comprising at least one fixed trim element and a rotatable plug element located in the conduit in closely abutting position. The trim element and the plug element have a plurality of ducts extending therethrough. The plug element has at least one transverse duct communicating between at least two of the plurality of ducts. The opening of the ducts on the inside face of the trim registers with the opening of the ducts on a face of the plug.
95 Citations
16 Claims
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1. A rotary control valve for controlling fluid flow through a conduit comprising:
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a plug element rotatable in the conduit having a plurality of ducts extending through the plug from a first face to a second face and at least one transverse duct communicating between at least two of the plurality of ducts, the transverse duct and the said two ducts defining fluid flow paths therethrough, the average cross sectional area of the flow path of the transverse duct being less than the average cross sectional area of the flow paths of the said two ducts; a first trim element located in the conduit abutting the plug, having a plurality of ducts extending from an outside face to an inside face, the inside face being dimensioned to closely conform to the first face of the plug; and wherein the location and dimension of the ducts on the inside trim face coincide with the location and dimension of the ducts on the first plug face. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A rotary control valve for controlling fluid flow through a conduit comprising:
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a plug element rotatable in the conduit having a plurality of ducts extending through the plug from a first face to a second face and at least one transverse duct communicating between at least two of the plurality of ducts, the transverse duct and the said two ducts defining fluid flow paths therethrough, the average breadth of the flow path of the transverse duct being less than one half the average length of the said two ducts; a first trim element located in the conduit abutting the plug, having a plurality of ducts extending from an outside face to an inside face, the inside face being dimensioned to closely conform to the first face of the plug; and wherein the location and dimension of the ducts on the inside trim face coincide with the location and dimension of the ducts on the first plug face. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification