We can only replace the air filter element according to the method specified by the engine or air filter manufacturing companies or according to the air pressure difference measured by the air pressure difference indicator.
The filtration efficiency of the air filters elements of different air filters for cars will change over time. The new unused filter element has the lowest filtration efficiency, but as time goes by, dust and impurities will be filtered by the filter element, and the dust accumulated on the outer surface of the filter paper of the filter element will continuously improve the filtration efficiency of the filter element.
When replacing the outer filter element for the third time, replace the inner filter element. Notes: when the above replacement cycle is reached, replace the inner filter element.
The vortex plate has prefiltration function, which can prolong the service life of filter elements. It is usually used in harsh working environment.
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