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  • ISO 11170:2003 is an international standard which defines a sequence of tests for verifying filter elements. It can be used to check their hydraulic, mechanical and separation characteristics. ISO 11170 is not intended to qualify a filter for a particular duty or replicate conditions of service. This can only be done by a specific test protocol developed for the purpose, including actual conditions of use. The procedure in ISO 11170 is applicable to individual fluids, or types of fluid having similar chemistry.