Evaluating the quality of the filter element is a comprehensive judgment process involving many aspects, the key is to identify its material, gum, filtration effect, life and the impact of several core factors on the equipment:
1. Material evaluation
(1) Filter paper quality: the filter material of the filter element is usually composed of filter paper, and its quality directly affects the filtration effect. High-quality filter paper should have a uniform color and a flat surface. The color of the filter paper of the genuine filter element is uniform and the paper is smooth. On the contrary, poor quality filter paper color uneven, rough surface, easy to lead to dust into the engine, affecting its normal work.
(2) Rubber elasticity: The structure of the filter element usually contains a rubber component for fixing and sealing. High quality filter rubber has good texture and elasticity. If the rubber texture of the filter element is poor, it may affect the adhesion with the filter paper, resulting in reduced sealing performance.
2. Gum judgment
(1) crease recovery: The quality of gum can be judged by observing the speed and degree of recovery after folding the filter element in half. The genuine filter element can be quickly restored to its original state after loosening, while the inferior filter element has obvious traces in the middle of the fold due to the rubber texture problem, and the recovery is slow.
(2) Edge sealing: carefully check the edge sealing of the filter element, the edge of the genuine filter element should be tightly fitted without significant gaps. A poorly sealed filter element cannot effectively prevent dust and impurities from entering, thus damaging the engine.
3. Filtering effect analysis
(1) Filtration accuracy: a high-quality filter element should be able to effectively filter particles and impurities in the air, such as the microporous structure of the PP filter element can filter harmful impurities greater than 1 micron.
(2) Air permeability test: The air permeability of different filter elements can be compared by a simple blow test. Point the hair dryer at the filter element to blow air, feel the air intake and resistance of different filter elements, and the filter element with better permeability is more conducive to the air-fuel ratio regulation of the engine.
4. Service life assessment
(1) Replacement cycle: high-quality filters usually have a clear cycle of use, such as car air filters are recommended to be cleaned every 5000 kilometers, and the replacement cycle is moderately reduced according to different road conditions and environments.
(2) Durability comparison: Measuring the quality of the filter element also needs to consider its durability under normal working conditions. The high-quality filter element should maintain a good filtration effect before reaching the replacement cycle, and it will not be deformed or damaged by water pressure or external force.