BS ISO 9912-4:2018规定了用于农业灌溉系统的加压颗粒介质过滤器（以下简称介质过滤器）的结构要求和试验方法。它既适用于手动清洗介质过滤器，也适用于自动自清洗介质过滤器，用作单个装置或电池（两个或多个装置并联工作）。本文件涵盖了介质过滤器的操作和性能，以及过滤器操作所需的所有相关阀门、反冲洗机构、地下排水管、歧管和其他相关附件。交叉引用: ISO 9912-2:2013ISO 9912-3ISO 9912-1ISO 9644购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS ISO 9912-4:2018 specifies construction requirements and test methods for pressurized granulated media filters, hereinafter referred to as media filters, intended for operation in agricultural irrigation systems.It is applicable to both manual cleaning media filters and automatic self-cleaning media filters, used as single unit or in batteries (two or more units working in parallel).This document covers the operation and performance of a media filter, together with all related valves, back flushing mechanism, underdrains, manifolds and other related accessories necessary for the operation of the filter.Cross References:ISO 9912-2:2013ISO 9912-3ISO 9912-1ISO 9644All current amendments available at time of purchase are included with the purchase of this document.