辅助限位开关（提供2种装置）
Auxiliary Limit Switches (Provide in sets of 2)

　　可配置在所有高级电动阀门上。附加的内部安装单刀双掷（SPDT）限位开关与电机开关分开独立工作。一般用于指示器灯，辅助设备等。执行机构组件包可配置1到2种附加辅助开关装置。在订购更换装置时，请指明凸轮孔径（ ³/₈英寸¹/₂英寸）。
　　Available for all Premium Electric actuated valves. Additional internally mounted single pole double throw limit (SPDT) independent from the motor switches. Typically used for indicator lights, auxiliary equipment, etc. Actuation packages accept from 1 to 2 additional sets of auxiliary limit switches as indicated. When ordering replacement sets, specify hole size of cams (either ³/₈" or ¹/₂")

扭矩传感器
Torque Sensor

　　可配置在所有高级电动阀门上。内部安装传感器可调节到规定的限制扭矩，以防止阀门因卡住而损坏。
　　Available for all Premium Electric actuated valves. Internally mounted sensor is adjustable to specific torque limits to avoid damage to valve in the event of blockage.

速度控制器
Speed Controller

　　可配置在所有高级电动阀门上。通过"开"时间和“关”时间选项的组合选择，内置安装继电器（图中没有显示）和固体状态定时器可以调节各种阀门循环时间（速度）。速度可以降低，但是不能超过执行器规定的标准循环时间。
　　Available for all Premium Electric actuated valves. Internally mounted relays (not shown) and solid state timer allow variable control of valve cycle time (speed) by selecting combinations of ON time and OFF time options. Rate may be slowed, but cannot exceed the standard cycle time specified for the actuator.