标准编号：ISO 14085-3:2015
中文名称：航空航天系列 液压过滤器元素 测试方法 第3部分：过滤效率和保留能力
英文名称：Aerospace series — Hydraulic filter elements — Test methods — Part 3: Filtration efficiency and retention capacity
发布日期：2015-03
标准范围
This part of ISO 14085 describes two methods to measure in repeatable conditions the filtrationefficiency of filter elements used in aviation and aerospace hydraulic fluid systems. It can be appliedwhen evaluating the overall characteristics of a filter element per ISO 14085-1, or separately.Since the filtration efficiency of a filter element can change during its service life as it is clogging, thistest method specifies its continuous measurement by using on-line particle counters with continuousinjection of test contaminant and recirculation of particles not retained by the test filter element untilthe differential pressure across the element reaches a given final or “terminal” value.This part of ISO 14085 allows the efficiency to be measured under both steady or cyclic flow conditions.It also is applied to measure the stabilized contamination levels that are produced by the filter elementwhile testing with cyclic flow.This part of ISO 14085 is not intended to qualify a filter element under replicate conditions of service;this can only be done by a specific test protocol developed for the purpose, including actual conditionsof use, for example the operating fluid or contamination.The tests data resulting from application of this part of ISO 14085 can be used to compare the performanceof aerospace hydraulic filter elements.
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