The diesel filter shall undergo the following tests in accordance with the ISO4020 standard (Road Vehicles - Test Methods for Fuel Filters for Automotive Diesel Engines).
1. New filter cleaning test
Determine whether the inner side of the filter element has been cleaned of residual dust and impurities during production, storage, and transportation.
2. Bubble method test
Used to verify whether there are pores in the filter element that are greater than the filtration accuracy.
3. Filtering efficiency and service life test
The filtration efficiency refers to the percentage of specific particles that are filtered out, and the filter life is expressed as the time when the blockage test pressure difference is greater than 0.07MPa.
4. Water separation validity test
Determine the percentage of water in the oil-water mixture separated by the oil filter.
5. Filter element damage test
Determine the anti rupture pressure of the filter element.
6. Oil filter assembly damage test
Measure the ability of the assembly to withstand internal pressure.
7. Pulsating pressure fatigue test
Measure the mechanical strength of the oil filter assembly under pulsating pressure (simulating engine start or stop).
8. Anti vibration fatigue test
Determine the mechanical strength of the oil filter against vibration under normal usage conditions.