ISO/TR 15640:2011适用于液压油动力系统的污染控制原则，包括液压过滤器的选择和应用指南。尽管非颗粒污染物（如空气、水和化学品）的控制很重要，并进行了简要讨论，但ISO/TR 15640:2011的主要重点是颗粒污染物的控制以及该功能过滤器的选择和应用。

ISO/TR 15640:2011 is applicable to contamination control principles for hydraulic fluid power systems and includes guidelines for the selection and application of hydraulic filters. Although control of non-particulate contamination, e.g. air, water and chemicals, is important, and is briefly discussed, the primary focus of ISO/TR 15640:2011 is the control of particulate contamination and the selection and application of filters for that function.