Coupling assembly for rotary valves and related valve trim
By using the coupling components of expansion pins and tapered pins in the rotary valve, the problem of unstable connection between the flow control element and the valve shaft is solved, and more stable fluid control is achieved, which improves the reliability and accuracy of fluid control.
CN120332487APending Publication Date: 2025-07-18FISHER CONTROLS INT LLC
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Patent Information
- Application Number
- CN202510079103.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-01-17
- Filing Date
- 2025-01-17
- Publication Date
- 2025-07-18
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Figure CN120332487A_ABST
Abstract
The invention relates to a rotary valve and an associated valve trim. A valve trim of a rotary valve assembly includes a valve shaft, a flow control element coupled to the valve shaft, and a coupling assembly for coupling the valve shaft to the flow control element. The coupling assembly includes an expansion pin having a central bore and a taper pin sized for insertion into the central bore of the expansion pin. The expansion pin and the taper pin together are dimensioned to be inserted into the cross bore of the flow control element and through the lateral bore of the valve shaft. The retainer is arranged to maintain the taper pin in the central bore of the expansion pin. The retainer limits movement of the taper pin relative to the expansion pin.
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