液压传动.在循环流动条件下评价过滤元件过滤性能的多通道方法

[中文适用范围]： 本文件规定： a) 在循环流动条件下对液压流体动力过滤元件进行连续污染物注入的多通道过滤性能测试。 b) 确定污染物容量、颗粒去除和压差特性的程序。 c) 目前适用于液压流体动力过滤元件的测试，对于粒径≤25 µm(c)，平均过滤比大于或等于 75，最终测试系统储液器重力水平小于 200 mg/L。 有必要通过验证来确定测试设施中可使用的流速范围和粒径下限。 d) 使用 ISO 12103-1 A3 介质测试粉尘污染物和测试液体进行测试。 本文件提供了一种测试程序，可产生可重复的测试数据，用于评估液压流体动力过滤器元件的过滤性能，而不受静电电荷的影响。 本文件适用于三种测试条件： ——上游基本重力水平为 3 mg/L； ——上游基本重力水平为 10 mg/L； ——上游基本重力水平为 15 mg/L。 [外文原描述]： This document specifies: a) A multi-pass filtration performance test under cyclic flow conditions with continuous contaminant injection for hydraulic fluid power filter elements. b) A procedure for determining the contaminant capacity, particulate removal and differential pressure characteristics. c) A test currently applicable to hydraulic fluid power filter elements that exhibit an average filtration ratio greater than or equal to 75 for particle sizes ≤25 µm(c), and a final test system reservoir gravimetric level of less than 200 mg/L. It is necessary to determine by validation the range of flow rates and the lower particle size limit that can be used in test facilities. d) A test using ISO 12103 ‑ 1 A3 medium test dust contaminant and a test fluid. This document provides a test procedure that yields reproducible test data for appraising the filtration performance of a hydraulic fluid power filter element without influence of electrostatic charge. This document is applicable to three test conditions: — Base upstream gravimetric level of 3 mg/L; — Base upstream gravimetric level of 10 mg/L; — Base upstream gravimetric level of 15 mg/L.