阀门定位器工作原理及三断保护功能应用

Working principle of valve positioner and design scheme of failure lock

阀门定位器作为气动调节阀的关键附件,在工业过程控制领域得到广泛应用。本文介绍了阀门定位器的工作原理;根据特定场合工艺过程安全生产中阀门定位器的类型不同,使用与调节阀相应的功能应用方式,实现三断保护要求。

Valve positioner,as a key accessory of pneumatic valve,has been widely used in industrial process control.This paper introduce the working principle of valve positioner,and according to process safety production requirement,Valve position lock under lost control signal,power and instrument air supply,design corresponding schemes for different types of valve positioner.