A precision mechanical interface connecting the valve stem to the plug for torque transmission and sealing.
The stem connection in a valve plug assembly is a critical interface component that mechanically links the actuator stem to the plug disc. It transmits rotational or linear motion from the actuator to the plug, enabling precise flow control while maintaining structural integrity under pressure, temperature, and mechanical stress. Common configurations include threaded connections (internal/external threads), pinned joints (shear pins, taper pins), splined shafts, or keyed couplings, each designed for specific torque requirements, alignment precision, and maintenance accessibility.
诱因 → 失效模式 → 工程缓解
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Threaded connections (most common for precise adjustment), pinned connections (for high-torque or quick-disassembly applications), splined shafts (for high-torque transmission without backlash), and keyed couplings (for positive torque transfer with alignment).
Use stress-relieved materials, proper thread engagement (minimum 1.5x diameter), anti-galling coatings, regular lubrication with compatible greases, and implement torque monitoring during assembly to avoid over-tightening.
ISO 5211 for mounting dimensions, ISO 5752 for valve stem ends, DIN 3337 for valve attachments, and ASME B1.1 for thread specifications. Industry-specific standards include API 6D for pipeline valves.
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CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。
说明目标数量、应用场景、交期和关键技术要求，用于准备 RFQ 或供应商评估。