| 摘要 |
A liquid filtration device that efficiently filters a filter element and vents pressurized vapors from inside the filter element. The liquid filtration device is comprised of a vent valve apparatus that is furnished within the main body of the filter head and a plug which is located on the filter housing. The main body has a first opening that is located on the outside of the filter housing, a second opening that communicates with the inside of the filter element, an opening that communicates with the second opening and the first opening and a third opening. The third opening permits communication between the filter element and the filter housing as well as between space and the passage found within the third opening. The plug is installed within this passage, and can move between a first position that does not vent pressurized vapors that are within the housing and a second position that vents pressurized vapors that are within the housing.
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