BS 7403-4-1998 内燃机满液流式润滑油过滤器.初始微粒滞留效率、寿命和累积效率试验方法(重力法)

标准号：BS 7403-4-1998
中文标准名称：内燃机满液流式润滑油过滤器.初始微粒滞留效率、寿命和累积效率试验方法(重力法)
英文标准名称：Full-flow lubricating oil filters for internal combustion engines - Methods of test for initial particle retention efficiency, life and cumulative efficiency (gravimetric method)
标准类型：J94
发布日期：1998/3/15 12:00:00
实施日期：1998/3/15 12:00:00
中国标准分类号：J94
国际标准分类号：21.260
适用范围：This part of ISO 4548 specifies tests for determining the performance of full-flow lubricating oil filters for internal combustion engines as follows. Section 2: Initial particle retention efficiency. This gives the test procedures and parameters for the determination of the initial particle retention efficiency of lubricating oil filter elements under defined test conditions. By reporting the results in accordance with subclause 2.6, the probable retention efficiency for any particle size may be derived. The retention efficiency is determined by the gravimetric method. Section 3: Life and cumulative efficiency. This gives the test procedures and parameters for the determination of element life and cumulative efficiency of lubricating oil filters. The cumulative efficiency is determined by the gravimetric method. NOTE —By agreement between filter manufacturer and purchaser, tests on large filters can be conducted on the basis of tests carried out on filters scaled-down in length. The relationship of the filter flow and test dust addition rate to the effective length of the filter medium should be the same in the scaled-down tests as in the full size filter. For the purposes of this part of ISO 4548, a filter having a test flow rate exceeding 100 l/min is considered large.