“2线”控制继电器
"2-Wire" Control Relay

　　可配置在高级电动球阀和蝶阀上。通过内部安装控制继电器，特殊控制开关进行操作就如同电磁阀一样。当控制开关开启时阀门开启，而当控制开关关闭时阀门关闭。采用4线，2线连接到线电压，2线连接到单刀单掷控制开关。可提供正常关闭或正常开启设置。
　　Available for Premium Electric actuated Ball valves and Butterfly Valves. Special control switch setup operates like a solenoid valve through internally mounted control relay. Valve opens when control switch is open and closes when control switch is closed. Uses 4-wire connection with 2 wires to line voltage and 2 wires to SPST control switch. Available either in normally closed or normally open configuration.

定位器主板（调制）
Positioner Board (Modulating)

　　可配置在所有高级电动阀门上。调制用于根据外部控制信号对流量进行控制或调节。内部安装的固体状态定位器主板能够精确控制阀门从开启到关闭的各种位置。可提供下列执行器电压和输入信号（注：调峰服务备选件包括工作循环升级最小到75%）。
　　Available for all Premium Electric actuated valves. Modulation is used to control or throttle flow in response to an external control signal. An internally mounted, solid state positioner board accurately controls valve position from open to close. Available in the actuator voltages and input signals shown (Note: Modulating Service option includes Duty Cycle Upgrade to a minimum of 75%).

LED位置指示器灯
LED Position Indicator Lights

　　可配置在所有高级电动阀门上。LED（发光二极管）红/绿指示器灯安装在执行器外壳上，用于显示开启/关闭位置。
　　Available for all Premium Electric actuated valves. LED (light emitting diode) red/green indicator lights mounted on actuator enclosure to designate open/closed position.

加热器和温度调节装置
Heater and Thermostat

　　可配置在所有高级电动阀门上。安装在内部，在低温环境中壳内加温以防止冷凝并保持内部润滑剂处于液体状态。当外壳内部温度下降到设置点以下时，温度调节装置启动加热器。可提供各种温度调节装置，在订购时必须指定设置点。
　　Available for all Premium Electric actuated valves. Mounted internally, heats the inside of the enclosure in low temperature environments to prevent condensation and keep internal lubricants fluid. The thermostat activates the heater when the enclosure internal temperature drops below the set point. There are a variety of thermostats available and a set point must be specified at the time of ordering.