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原文
Valve actuator failure and repair Valve actuator failure will not affect other parts of the valve, repair and replacement work can not be removed the valve case. (1) The yoke sleeve: aluminum bronze yoke sleeve configuration needle thrust bearings, to minimize operating torque. (2) Stem: length of thread until the bracket; pin and spot welding; with stability. (3) Pressure seal: simple structure, configuration, and silver-plated mild steel sub-ring gasket, helping to achieve the best demolition and sealing of the valve cap. (4) Seat Ring: welded seat ring perpendicular to the flow channel, easy to maintain. (5) Executive agencies: These valves can be configured electric, hydraulic or pneumatic actuator. The following configuration standards DN300 hand hands wheel, DN350 above configuration helical gear operator. (6) yoke: completely fabricated yoke through seismic testing, ease of maintenance and installation of the actuator. (7) gland: two-piece, self-adjusting gland, to avoid being ejected. (8) as a whole back seat: hard surface, the longest service life. (9) valve: the valve spring load to self-regulation, to reduce the actuator's torque demand. (10) as a whole stop: the whole cast bracket stop device, positioning the valve assembly of the bracket, making the seat more stable and reliable.
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译文：
阀门执行机构的故障不会影响到阀门的其它部分，维修和更换工作能够在不拆下阀门的情况下进行。 (1)轭架套管：铝青铜轭架套管配置针形止推轴承，最大程度减少操作扭矩。 (2)阀杆：螺纹长度直到托架；销钉和点焊；具有稳定性。 (3)压力密封：结构简单，配置分段扣环和镀银低碳钢垫圈，有助于拆卸和实现最好的阀帽密封。 (4)阀座环：焊接阀座环垂直于流动通道，易于维护。 (5)执行机构：这些阀门可以配置电动、液动或气动执行机构。DN300以下配置标准手动手轮，DN350以上配置斜齿轮操作机构。 (6)轭架：完全装配式轭架通过抗震测试，易于维护和安装执行机构。 (7)压盖：两件式，自调节压盖，避免被弹出。 (8)整体后座：硬面，使用寿命最长。 (9)阀瓣：弹簧负载阀瓣能够自行调节，减少执行机构的扭矩需求。 (10)整体止动：整体铸造托架止动装置，定位组装的托架阀瓣，使得阀座更加稳定可靠。

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