Provided is a control valve trim, including a plug having a plurality of sections arranged in series along a longitudinal axis, wherein each of the plurality of sections has a diameter that is greater than the diameter of the preceding section, and a plurality of slots in the surface of each of the
Provided is a control valve trim, including a plug having a plurality of sections arranged in series along a longitudinal axis, wherein each of the plurality of sections has a diameter that is greater than the diameter of the preceding section, and a plurality of slots in the surface of each of the plurality of sections, and a liner, wherein the plug is disposed internal to the liner.
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1. A control valve trim, comprising: a plug and a liner, each having a plurality of stages along a longitudinal axis of the control valve trim, wherein the plug and the liner comprise an expanding area between each of the plurality of stages, the expanding area is configured to provide an increased
1. A control valve trim, comprising: a plug and a liner, each having a plurality of stages along a longitudinal axis of the control valve trim, wherein the plug and the liner comprise an expanding area between each of the plurality of stages, the expanding area is configured to provide an increased flow path area, wherein each of the plurality of stages of the plug comprises a first set of slots spaced apart from one another circumferentially around the longitudinal axis and a second set of slots spaced apart from another circumferentially around the longitudinal axis, wherein the first and second sets of slots are axially spaced apart along the longitudinal axis, each of the first set of slots are generally parallel with one another, and each of the second set of slots are generally parallel with one another. 2. The control valve trim of claim 1, comprising a three dimensional fluid flow path including axial, radial, and circumferential turns along the longitudinal axis. 3. The control valve trim of claim 2, wherein the three dimensional fluid flow path includes a plurality of turns and an increasing cross-sectional area along the longitudinal axis from an inlet to an outlet of the three dimensional fluid flow path. 4. The control valve trim of claim 1, comprising a pressure balancing chamber within the plug, wherein the pressure balancing chamber is configured to balance axial forces acting on the plug. 5. A control valve trim, comprising: a plug, comprising:a plurality of sections arranged in series along a longitudinal axis of the plug, wherein each of the plurality of sections comprises a diameter that is greater than the diameter of the preceding section, and whereineach of the plurality of sections comprises a first set of slots spaced apart from one another circumferentially around the longitudinal axis and a second set of slots spaced apart from another circumferentially around the longitudinal axis, wherein the first and second sets of slots are axially spaced apart along the longitudinal axis, and wherein the first set of slots is offset from the second set of slots by approximately 90 degrees circumferentially around the longitudinal axis; anda liner, wherein the plug is disposed internal to the liner. 6. The control valve trim of claim 5, wherein the liner comprises a plurality of annular recesses arranged in series along the longitudinal axis about an interior of the liner, and wherein each of the plurality of annular recesses comprises a diameter that is greater than the diameter of the preceding annular recess. 7. The control valve trim of claim 6, wherein each of the plurality of annular recesses corresponds to one of the first or second set of slots of one of the plurality of stages. 8. The control valve trim of claim 7, wherein each annular recess is slightly offset along the longitudinal axis from the corresponding set of slots. 9. The control valve trim of claim 5, wherein the first set of slots is rotated from the second set of slots about the longitudinal axis. 10. The control valve trim of claim 5, wherein the liner comprises a plurality of annular recesses arranged in series along the longitudinal axis about an interior of the liner, and wherein each of the plurality of annular recesses comprises a diameter that is greater than the diameter of the preceding annular recess. 11. The control valve trim of claim 5, comprising a pressure balancing chamber within the plug, wherein the pressure balancing chamber is configured to balance axial forces acting on the plug. 12. The control valve trim of claim 5, wherein the liner comprises a plurality of internal bored sections arranged in series along the longitudinal axis about an interior of the liner, wherein each of the plurality of internal bored sections comprises a diameter that is greater than the diameter of the preceding internal bored section, and wherein each of the plurality of sections of the plug correspond to a respective internal bored section of the liner. 13. The control valve trim of claim 12, wherein each section of the plug is offset along a longitudinal axis from the corresponding internal bored section of the liner. 14. A control valve system, comprising: a plug having a series of sections increasing in diameter along a longitudinal axis of the plug, wherein each of the sections of the plug includes a first pair of slots and a second pair of slots, wherein the first and second pairs of slots are spaced apart from one another by approximately 90 degrees circumferentially around the longitudinal axis, the first pair of slots is located at a different axial position from the second pair of slots along the longitudinal axis, each slot of the first and second pairs of slots is formed in a radially most distal surface of the respective section of the plug, the first pair of slots are generally parallel to one another, and the second pair of slots are generally parallel to one another. 15. The control valve system of claim 14, comprising: a liner having a series of annular recesses along the longitudinal axis, wherein the series of annular recesses increase in diameter from an inlet of the liner to an exit of the liner. 16. The control valve system of claim 15, wherein the liner comprises internal protrusions that increase in diameter from the inlet of the liner to the exit of the liner.
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이 특허에 인용된 특허 (4)
Hamblin,Nathan J.; Long,Ted A., Control valve trim and seat design for valve trim with minimal unbalanced area.
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