| 摘要 |
Described is a filter cartridge having a clean side anti-drainback valve. The filter cartridge includes an annular filter element having a hollow core with an annular valve support 40 disposed therein. The clean side anti-drainback valve includes a valve 60 and an annular valve seat 70 having a base, a central opening, and a peripheral flange 82. The peripheral flange is mounted atop an upper surface 90 of the annular valve support such that the central opening is in alignment with the passage 50 leading out of the filter cartridge. The valve 60 is mounted on the valve seat and is biased by a coil spring to a normally closed position so that when the engine is not running clean side oil is retained within the filter cartridge. A dirty side anti-drainback valve can also be included.
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