GB/T 35348-2017Diesel engines -- Fuel filters -- Method for evaluating fuel/water separation efficiency (English PDF)

GB/T 35348-2017 is the English-translated version of 柴油机 燃油滤清器 油/水分离效率的评定方法.

GB/T 35348-2017 is the Chinese assessment method for the fuel/water separation efficiency of diesel engine fuel filters.

Clause 1 describes it as a method that uses continuous water injection and off-line water concentration measurement to determine the water separation efficiency of a fuel/water separator for insoluble water dispersed in the fuel, and states that it applies to separators with a rated flow in the range 50 L/h to 900 L/h and, where supply and demand are negotiated, to separators outside that flow range as well.

The table of contents gives clause 4, graphic symbol, clause 5, test equipment, with subclauses on the test solution, the laboratory equipment and the test stand, clause 6, Test conditions, with subclauses on the amount of fuel, the test temperature, the test flow, the water concentration for insoluble water, the pressure difference across the dispersion device and the total test time, clause 7, measuring equipment and test conditions, clause 8, verification procedures, with subclauses on the test stand and the sampling procedure, clause 9, Test Procedure, with subclauses on test preparation and the measurement of separation water efficiency, and clause 10, Test Calculation and Report, with subclauses on the calculation of water separation efficiency and the test report.

Four appendices follow: the normative Appendix A, Water dispersion device, the normative Appendix B, on the procedures for determining the small drop size distribution (DSD), the informative Appendix C, a typical filter test report, and the informative Appendix D, on the choice of the designated average bead size D50.

Clause 3 defines three terms: interfacial tension, the force required to increase the surface area between two liquid interfaces; the small drop size distribution (DSD), the distribution of droplets of different sizes, expressed as a percentage; and the background water concentration, the concentration of water dissolved in the fuel at saturation.

Clause 2 cites ISO 760, ISO 1219-1, ISO 6889, ISO 13320-1, ASTM D1401 and CEC RT-03.2003.

The foreword states that the standard is an identical translation of ISO/TS 16332:2006, that the editorial changes were limited to writing µL/L instead of ppm and L/h instead of l/h, and that it is under the jurisdiction of the National Automotive Standardization Technical Committee (SAC/TC114).

The draft breaks off after 3.3, so the text of no clause after 3.3 is shown. It was issued on 29 December 2017 and has applied since 1 July 2018; the page lists no superseded edition.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 44 pages — is available in the English PDF.

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