本技术报告适用于闭环控制应用中的节流控制阀。概念 在开环控制应用中有一定的应用。它不涉及开关中使用的控制阀 控制服务。本文件中的“控制阀”包括以下部件:阀门:阀门是用于控制流体流动的装置。它由一个含有流体的阀体组成 组件，连接开口和可移动闭合构件之间的一个或多个端口 打开、限制或关闭端口（见ANSI/ISA-75.05.01-2000，“控制阀术语”）。 促动器:促动器是一种提供力并导致阀门关闭运动的装置 成员通常为流体或电动（见ANSI/ISA-75.05.01-2000）。执行器经常 使用空气，但其他类型使用电动、液压和电液动力。运动转换机构:安装在阀门和发动机动力装置之间的机构 必要时，致动器可在线性和旋转运动之间转换。转换可以是线性的 执行机构动作到旋转阀操作，或从旋转执行机构动作到线性阀操作。附件:控制阀操作中使用的附加装置。 如中所述 ANSI/ISA-75.05.01-2000，典型示例包括定位器、传感器、信号增压继电器、空气装置、， 缓冲器等。

This technical report applies to throttling control valves in closed loop control applications. The concept has some application to open loop control applications. It does not address control valves used in on-off control service. The "control valve" in the context of this document includes the following components:Valve:A valve is a device used for the control of fluid flow. It consists of a fluid containing valve body assembly, one or more ports between connection openings and a moveable closure member, which opens, restricts or closes the port(s) (see ANSI/ISA-75.05.01-2000, "Control Valve Terminology").Actuator:An actuator is a device that supplies the force and causes the movement of the valve closure member. Commonly these are fluid or electrically powered (see ANSI/ISA-75.05.01-2000). Actuators often use air but other types use electric, hydraulic and electro-hydraulic power.Motion conversion mechanism:A mechanism installed between the valve and the power unit of the actuator to convert between linear and rotary motion where required. The conversion may be from linear actuator action to rotary valve operation or from rotary actuator action to linear valve operation.Accessories:Additional devices used in the operation of the control valve. As described in ANSI/ISA-75.05.01-2000, typical examples include a positioner, transducer, signal booster relay, air set, snubber, etc.