Before the 1980s, the engine oil filters were mostly replaceable. The filters of this structure were to put the filter elements and other parts into a metal shell, and to fasten the casing filter elements to a metal filter seat through the pull rod
Its advantages are low cost, need only regular maintenance to change the filter element, the shortage is easy to cause oil leakage, and with lots trouble to change the element.
After the 1980s , The Filters improve to Rotary filter ,which characterized that the inside of the filter is internally provided with a check valve and a bypass valve , the sealing point has only one,have to change integral filter,the sealing property is greatly improved ,and the filter is easy to change.
The High quality filter element material is export filter paper , so the filter with high filtration efficiency, the flow resistance is small , and the service life is long .
Now, All the small car use this Rotary filter,almost Minivans, large bus, medium bus and small buses, trucks, heavy trucks and agricultural vehicles use the Rotary Filter.
China Everlasting Parts Co., LTD supply the filters with the HV Filters Parper, Ahlstrom Filters Paper..
