美国克雷恩弹性阀座蝶阀上采用操作手柄进行启闭和节流控制。所有规格型号的齿轮执行机构不受天气的影响，既可用于地面管道，也可用于地下管道。对于阀门的人工操作，通径DN350以上的阀门需要采用齿轮执行机构，但是建议通径DN200以上的阀门都要采用齿轮执行机构。
　　 Gear operators can be used for on/off and throttling control of Crane resilient seated butterfly valves. All models are weatherproof and usable for above ground or buried service. For manual operation of valves, gear operators are required for valves 14" and larger and are recommended for valves 8" and larger.

　　特点 Features
　　美国克雷恩齿轮执行机构是 90°人工执行机构，由手轮、链轮或方形螺母输入装置构成。坚固耐用的外壳将蜗轮（在输入轴上）和扇形齿轮（在输出轴上）完全保护起来。可调节止动机构是标准配置，并在工厂安装时进行设定。作为备选方案，可以选择完全可调节记忆止动机构。地面应用的所有规格型号的齿轮执行机构，标准配置包括位置指示器。对于地下应用，有一种备选方案，需要此种备选方案，请与我们联系。
　　Gear operators from Crane are 90° manual actuators, and they come with a handwheel, chainwheel, or square nut input device. The durable housing completely encloses the worm gear (on the input shaft) and the segment gear (on the output). Adjustable stops are standard and factory set when installed at the factory. Fully adjustable memory stops are available as an option. A position indicator is standard on all models for above ground service. An optional version is available for buried service applications. Contact customer service for more information.

　　规格型号Specifications
　　操作手轮或链轮（标准配置是300mm。其它尺寸是备选方案）或2英寸方形螺母。加长输入轴是备选方案。
　　安装方式：在通径DN50～DN750的美国克雷恩弹性阀座蝶阀上，可以采用螺栓安装、钻孔安装或键槽安装等直接安装方式。双重螺栓安装模板包括不同款式设计。
　　Operation Handwheel or chainwheel (12" standard, others available) or 2" square nut. Input shaft extension available.
　　Mounting Available with bolt patterns and bore/keyway for direct mount to all 2" through 30" Crane resilient seated butterfly valves. Dual bolt patterns accommodate different pad designs.

　　注意：上列技术数据随时可能更改，恕不另行通知。
　　 NOTE: TECHNICAL DATA SUBJECT TO CHANGE WITHOUT NOTICE.