What standard can judge the quality of the oil filter, weight, filter fold or brand? Many "knowledgeable people" on the Internet say that the more the filter paper is folded, the better the quality.

Comparing the original parts of a car company with the folding number of the filter paper of the same model of Merrill, the original filter paper is 36 folds, while Merrill has 48 folds. According to the "knowledgeable" statement, is the original part...

Aside from the essence, it is wrong to talk about the phenomenon. The filter element is used to filter impurities, and the quality refers to the filtering performance, not the folding number. From a professional point of view, the filtration performance of the filter element is generally reflected by the following three indicators.

Fiber thickness

A good filter material should have high precision, relatively low filtration resistance and high dirt holding capacity. Generally speaking, the finer the fibers that make up the filter material, the denser the structure of the filter material and the larger the quantification, the higher the filtration accuracy, but at the same time the resistance increases and the porosity decreases. In the case of the same quantification, the thicker filter material has stronger dirt holding capacity.

Porosity

When the oil filter paper filters the liquid, it must ensure a certain filtration speed, that is, there must be certain pores in the filter paper, so that the liquid can pass through smoothly and increase the unit output. The number of pores can be expressed by porosity. Generally speaking, the higher the porosity of the same thickness of paper, the stronger the filtration capacity.

Burst and Stiffness

The filtering principle of oil filter paper is to filter out harmful impurities in the oil from the oil pan, and supply the crankshaft, connecting rod, camshaft, supercharger, piston ring and other moving pairs with clean oil to lubricate, cool and clean, thereby extending the life of these components. When the inlet end is pressurized by the filter body, there is a certain pressure difference with the outlet end of the filter layer, so that the liquid passes through the combined filter plate of the filter frame to complete the filtration. Therefore, the oil filter paper must have a certain strength while ensuring the filtration speed, otherwise it may be damaged during the filtration process. In this way, the service life of the filter paper is shortened, and the number of filter paper replacements is increased, which not only reduces the unit output, increases the production cost of the user, directly affects the economic benefit of the user, but also damages the reputation of the product. Improving the burst resistance is one of the important factors to prolong the service life of the filter.

In addition to fiber thickness, filtration efficiency, and dust holding capacity, there are many aspects to judge the quality of the filter element, such as dust holding capacity, corrosion resistance, invisible cracks in the casing, sealing effect of rubber rings, bypass valve safety device, etc., these factors will affect the product quality.

The number of folds only reflects one of the small aspects of the filter area of the filter element. It cannot reflect the core index of the filter element. It is actually a "pseudo proposition" to judge the quality of the filter element only by the number of folds of the filter paper. Comparing one of the indicators is only comparable under the same conditions.