Development history of oil filter

Before the 1980s, most domestic engines used replaceable filters. The filter with this structure puts the filter element and other parts, such as springs, sealing rings, etc., into a metal shell, and connects and fixes the shell filter element and the like with a metal filter seat through a pull rod. The advantage of the replaceable machine filter is that it has low cost of use and only needs regular maintenance and replacement of the filter element; the disadvantage is that there are too many sealing points, maintenance and replacement of the filter element may miss parts, which is easy to cause loopholes, and replacement is troublesome. Since the early 1980s, spin-on filters have gradually been approved and selected by domestic OEMs. The spin-on filter is characterized by a check valve, a bypass valve, and only one sealing point. The integral replacement greatly improves the sealing performance and is easy to replace. The filter element material is mostly imported filter paper, so the filtration efficiency is high. , The flow resistance is small, and the life is long.