IS 13535 : 2025/ISO 16889 : 2022 Hydraulic Fluid Power - Filters - Multi-Pass Method for Evaluating Filtration Performance of Filter Element
Revised Standard from Last Update.
NATIONAL FOREWORD
This Indian Standard (Third Revision) which is identical to ISO 16889 : 2022 'Hydraulic fluid power - Filters - Multi-pass method for evaluating filtration performance of filter element' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Fluid Power System Sectional Committee and approval of the Production and General Engineering Division Council.
This standard was first published in 1994 and was subsequently revised in 2005 and 2017. This revision has been brought out to align it with the latest version of ISO 16889. In this revision, following major changes have been incorporated:
a) Table 4 (previous references to Table 4 have been replaced by references to ISO 11943 : 2021, Table C.2) has been deleted; and
b) Conductivity levels have been harmonized with ISO 23369.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.