本标准提供了气动止动阀轭执行机构规范制定的一般要求。本文件适用于最大允许工作压力（MAOP）高达250 psig且带有压缩气体（即仪表空气）的致动器。

This standard provides general requirements for the development of specifications for pneumatic scotch yoke actuators.This document applies to actuators with a maximum allowable operating pressure (MAOP) up to 250 psig with a compressed gas (i.e., instrument air).