A control element for a fluid flow control device includes a stem, a plug, and a fastener. The stem includes an elongated member with a first end and a second end. The first end is adapted to be operably coupled to an actuator and the second end including a fastener recess including a plurality of i
A control element for a fluid flow control device includes a stem, a plug, and a fastener. The stem includes an elongated member with a first end and a second end. The first end is adapted to be operably coupled to an actuator and the second end including a fastener recess including a plurality of internal threads. The plug is disposed adjacent to the second end of the stem. The fastener fixing the plug to the stem and includes a threaded portion extending from the plug and engaging the plurality of internal threads of the fastener recess.
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1. A control element for a fluid flow control device, the control element comprising: a stem comprising an elongated member with a first end and a second end, the first end adapted to be operably coupled to an actuator and the second end including a fastener recess including a plurality of internal
1. A control element for a fluid flow control device, the control element comprising: a stem comprising an elongated member with a first end and a second end, the first end adapted to be operably coupled to an actuator and the second end including a fastener recess including a plurality of internal threads;a plug disposed adjacent to the second end of the stem;a fastener fixing the plug to the stem, the fastener including a threaded portion extending from the plug and engaging the plurality of internal threads of the fastener recess; andan anti-rotation device disposed between the second end of the stem and the plug for preventing rotation of the stem relative to the plug and fastener,wherein the anti-rotation device comprises washer having a disc-shaped body and one or more tabs extending radially outwardly from the disc-shaped body, and the second end of the stem includes one or more flat surfaces each engaging a corresponding tab of the one or more tabs. 2. The control element of claim 1, wherein the plug comprises a compression cap, a plug body, and a seal member disposed between the compression cap and the plug body, and wherein the engagement between the fastener and the fastener recess compresses the seal member between the compression cap and the plug body. 3. The control element of claim 2, wherein the compression cap is disposed between the second end of the stem and the plug body. 4. The control element of claim 1, wherein the fastener is formed as one piece with at least a portion of the plug. 5. The control element of claim 4, wherein the fastener is formed as one piece with the plug body of the plug. 6. The control element of claim 1, wherein the plug defines a through-bore, a first surface adjacent to the second end of the stem, and a second surface spaced from the stem. 7. The control element of claim 6, wherein the fastener comprises an elongated shank disposed through the through-bore in the plug and having a first end and a second end, the first end of the shank including the threaded portion of the fastener disposed in the fastener recess, the second end of the shank including a head disposed adjacent the second surface of the plug. 8. The control element of claim 7, further comprising a head recess disposed in the second surface of the plug, the head of the fastener being disposed in the head recess for preventing rotation of the head relative to the plug. 9. The control element of claim 7, wherein the first end of the shank of the fastener includes a first diameter and the second end of the shank of the fastener includes a second diameter that is larger than the first diameter. 10. The control element of claim 9, wherein the shank further comprises a shank shoulder disposed between the first and second ends and the plug comprises a plug shoulder engaged by the shank shoulder for aligning the fastener and the plug. 11. The control element of claim 1, wherein the second end of the stem further comprises a flat ring surface circumscribing the tapered surface and engaging the plug outside of the circular recess for aligning the stem and the plug. 12. The control element of claim 1, wherein the plug includes a circular recess with an angled sidewall and the second end of the stem includes a tapered surface engaging the angled sidewall of the circular recess for aligning the stem and the plug. 13. The control element of claim 12, wherein the circular recess in the plug further comprises flat floor surface circumscribed by the angled sidewall and the second end of the stem further comprises a flat ring surface circumscribed by the tapered surface, the flat ring surface of the stem engaging the flat floor surface of the recess in the plug. 14. A fluid flow control device, comprising: a valve body including an inlet, an outlet, and a gallery disposed between the inlet and the outlet;a cage mounted within the gallery and including a plurality of openings for allowing the passage of fluid through the cage and the gallery;a control element including a stem, a plug, and a fastener fixing the plug to the stem, the plug being slidably disposed within the cage for controlling the flow of fluid through the valve body,the stem comprising an elongated member with a first end and a second end, the first end extending out of the valve body for being operably coupled to an actuator, the second end including a fastener recess including a plurality of internal threads,the plug disposed adjacent to the second end of the stem, andthe fastener including a threaded portion extending from the plug and engaging the plurality of internal threads of the fasten er recess; andan anti-rotation device disposed between the second end of the stem and the plug for preventing rotation of the stem relative to the plug and fastener,wherein the anti-rotation device comprises washer having a disc-shaped body and one or more tabs extending radially outwardly from the disc-shaped body, and the second end of the stem includes one or more flat surfaces each engaging a corresponding tab of the one or more tabs. 15. The device of claim 14, wherein the plug comprises a compression cap, a plug body, and a seal member disposed between the compression cap and the plug body, and wherein the engagement between the fastener and the fastener recess compresses the seal member between the compression cap and the plug body. 16. The device of claim 15, wherein the compression cap is disposed between the second end of the stem and the plug body. 17. The device of claim 14, wherein the fastener is formed as one piece with at least a portion of the plug. 18. The device of claim 17, wherein the fastener is formed as one piece with the plug body of the plug. 19. The device of claim 14, wherein the plug defines a through-bore, a first surface adjacent to the second end of the stem, and a second surface spaced from the stem. 20. The device of claim 19, wherein the fastener comprises an elongated shank disposed through the through-bore in the plug and having a first end and a second end, the first end of the shank including the threaded portion of the fastener disposed in the fastener recess, the second end of the shank including a head disposed adjacent the second surface of the plug. 21. The device of claim 20, further comprising a head recess disposed in the second surface of the plug, the head of the fastener being disposed in the head recess for preventing rotation of the head relative to the plug. 22. The device of claim 20, wherein the first end of the shank of the fastener includes a first diameter and the second end of the shank of the fastener includes a second diameter that is larger than the first diameter. 23. The device of claim 22, wherein the shank further comprises a shank shoulder disposed between the first and second ends and the plug comprises a plug shoulder engaged by the shank shoulder for aligning the fastener and the plug. 24. The device of claim 14, wherein the second end of the stem further comprises a flat ring surface circumscribing the tapered surface and engaging the plug outside of the circular recess for aligning the stem and the plug. 25. The control element of claim 14, wherein the plug includes a circular recess with an angled sidewall and the second end of the stem includes a tapered surface engaging the angled sidewall of the circular recess for aligning the stem and the plug. 26. The device of claim 25, wherein the circular recess in the plug further comprises flat floor surface circumscribed by the angled sidewall and the second end of the stem further comprises a flat ring surface circumscribed by the tapered surface, the flat ring surface of the stem engaging the flat floor surface of the recess in the plug. 27. A control element for a fluid flow control device, the control element comprising: a stem comprising an elongated member with a first end and a second end, the first end adapted to be operably coupled to an actuator and the second end including a fastener recess including a plurality of internal threads;a plug disposed adjacent to the second end of the stem, the plug comprising a through-bore, a plug body, a compression cap, and a seal member, the compression cap disposed between the second end of the stem and the plug body, the seal member disposed between the compression cap and the plug body, the compression cap defining a first surface of the plug adjacent to the second end of the stem, and the plug body defining a second surface of the plug spaced from the second surface of the stem;a fastener including an elongated shank disposed through the through-bore in the plug and having a first end and a second end, the first end of the shank including a threaded portion engaging the plurality of internal threads in the fastener recess of the stem, the second end of the shank including a head disposed adjacent to the second surface of the plug, thereby compressing the seal member between the compression cap and the plug body; andan anti-rotation device disposed between the second end of the stem and the first surface of the plug for preventing rotation of the stem relative to the plug and fastener, wherein the anti-rotation device comprises washer having a circular body and one or more tabs extending radially outwardly from the circular body, and the second end of the stem includes one or more flat surfaces each engaging a corresponding tab of the one or more tabs. 28. The control element of claim 27, further comprising a head recess disposed in the second surface of the plug, the head of the fastener being disposed in the head recess and preventing rotation of the head relative to the plug. 29. The control element of claim 27, wherein the second end of the stem further comprises a flat ring surface circumscribing the tapered surface and engaging the first surface of the plug outside of the circular recess for aligning the stem and the plug. 30. The control element of claim 27, wherein the first end of the shank of the fastener includes a first diameter and the second end of the shank of the fastener includes a second diameter that is larger than the first diameter. 31. The control element of claim 30, wherein the shank further comprises a shank shoulder disposed between the first and second ends and the plug includes a plug shoulder engaged by the shank shoulder for aligning the fastener and the plug. 32. The control element of claim 27, wherein the first surface of the plug includes a circular recess with an angled sidewall and the second end of the stem includes a tapered surface engaging the angled sidewall of the circular recess for aligning the stem and the plug. 33. The control element of claim 32, wherein the circular recess in the plug further comprises flat floor surface circumscribed by the angled sidewall and the second end of the stem further comprises a flat ring surface circumscribed by the tapered surface, the flat ring surface of the stem engaging the flat floor surface of the recess in the plug.
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이 특허에 인용된 특허 (4)
Fleming,Leslie E., Apparatus to connect a stem to a valve member.
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