Actuation of a valve requires both a mounting device for attaching the actuator to the valve, and a coupling device to interface actuator input/output with the valve stem.

• 阀门的执行机构需要安装装置，用于将执行机构附加在阀门上；和连接装置，用作执行机构输入/输出与阀门阀杆的交互界面。