本文件规定了直接作用压力调节阀（以下简称“压力调节器”）的结构和性能要求以及试验方法，这些阀门用于灌溉系统，水温不超过60°C，其中可能含有农业灌溉中常用类型和浓度的肥料和化学品。 本文件适用于标称尺寸小于等于100毫米（4英寸）的压力调节器。

This document specifies construction and performance requirements and test methods for direct-acting pressure-regulating valves (hereinafter "pressure regulators") intended for operation in irrigation systems, with water at temperatures not exceeding 60？°C, which can contain fertilizers and chemicals of types and in concentrations commonly used in agricultural irrigation. This document applies to pressure regulators in nominal sizes up to and including 100？mm (4？in).