ISO 14085-6:2015定义了一种参考方法，用于确定飞机液压系统中使用的新滤芯的清洁度水平，在装运前生产后，或在回路中安装前。 它适用于特殊规范中规定的需要流体清洁条件的系统上使用的滤芯。 应用ISO 14085本部分得出的试验数据可用于比较航空航天液压滤芯的清洁度。

ISO 14085-6:2015 defines a reference method for determining the level of cleanliness of new filter elements for use in aircraft hydraulic systems, after production prior to shipment, or prior to installation in the circuit. It applies to filter elements used on systems requiring fluid cleanliness conditions defined in the particular specification. The tests data resulting from application of this part of ISO 14085 can be used to compare the cleanliness of aerospace hydraulic filter elements.