A filter element for filtering a fluid is connectable to a filter head with a drainage channel. The filter element has a closure element that closes the drainage channel of the filter head when the filter element is connected to the filter head. The closure element is eccentrically arranged relative to a longitudinal axis of the filter element at an end face of the filter element. The closure element extends away from the end face of the filter element in an axial direction of the filter element. A stand is locked at the filter element and extends away from the end face of the filter element in the axial direction to a level of a free end of the closure element or past the free end of the closure element.

A water purifying filter cartridge structure includes: a filter cartridge main body and a filter cartridge bottom seat. The filter cartridge main body includes: a filter barrel, a filter barrel cover, a filter body, a filter chamber, and a back flow check component. The filter barrel cover is disposed on a top portion of the filter barrel. The filter body is adapted to remove impurities from water. The filter chamber is disposed in the filter barrel, and the back flow check component is disposed in the filter barrel. The back flow check component includes a first back flow check piece, a second back flow check piece, and a third back flow check piece. The first back flow check piece and the second back flow check piece are adapted to prevent back flow at the water input end.

An exchangeable filter system is provided with an exchangeable filter module that has at least one fluid inlet, at least one fluid outlet, and a fluid path connecting the at least one fluid inlet and the at least one fluid outlet with each other. The exchangeable filter module is provided with at least one filter element for filtering a fluid. A flange element and a counter flange element are provided. The flange element is provided to releasably engage the exchangeable filter module and to releasably engage the counter flange element. A valve device is arranged in the flange element. The valve device blocks the fluid path when the flange element is in engagement with the exchangeable filter module and is disengaged from the counter flange element. An internal combustion engine is provided with such an exchangeable filter system to filter fuel, lubricant or urea.

A filter device includes in a filter housing a hollow cylindrical filter element having frontal end plates. A port having a first sealing element is incorporated into a cover the filter housing, said sealing element being arranged coaxially relative to a second sealing element in a flow opening in the end plate.

The fluid filter assembly includes a container and a filter media that is disposed in the container and partially divides it into an unfiltered space and a filtered space. A bypass valve assembly is disposed at one axial end of the filter media and includes an end cap and a valve housing, which has a through opening. The end cap is in engagement with an end face of the filter media. The bypass valve assembly further includes a valve plug which has a head portion and a tail portion. The valve plug is biased into a closed position by a compression spring and is moveable from the closed position to an open position to allow the fluid to flow directly from the unfiltered space to the filtered space. The valve housing and the end cap are made as a monolithic piece.

The invention provides a filtration system with a rotating core driving thimble opening and closing water passage, comprising a casing, a filter and a connector, wherein the filter and the connector are connected and fixed in an inner cavity of the casing, the casing consists of an upper cover of the casing and a lower cover of the casing, which are connected via a connecting member; a connector core of the present invention has a groove and a boss thereon, the connector core, a water intake thimble and a water outtake thimble are tightly pressed by a spring, when the connector is rotated, the water intake thimble and the water outtake thimbles are raised from the position of the groove to the position of the boss, and the water passage is opened. When disassembled, the connector is lowered from the position of the boss to the position of the groove, and the water passage is closed, preventing the leakage of the connector water due to the removal of a filter element. Due to the action of the spring, even if the water intake thimble and the water outtake thimble are worn seriously, the water intake sealing ring and the water outtake thimble sealing ring is attached to a water intake thimble sleeve and a water outtake thimble sleeve, realizing the sealing and not causing the leakage phenomenon.

A filtration system with a rotating core driving thimble opening and closing water passage, including: a casing, a filter and a connector, wherein the filter and the connector are connected and fixed in the casing; the filter includes a filter element body and a carbon rod; the connector includes a connector core, a water intake thimble, a water outtake thimble; the connector core is provided with a water inlet boss on which a first arc groove is provided, and a water outlet boss on which a second arc groove is provided; the water intake thimble and the water outtake thimble are lifted and falls through the rotation of the connector core, so that a water intake passage and a water outtake passage are opened and closed.

A filter element has a filter material defining a raw side and a clean side of the filter element and to be flowed through by a medium to be filtered from the raw side to the clean side. A non-return element is disposed on the filter material. The non-return element allows a return flow of the filtered medium from the clean side back to the raw side and prevents a flow of the unfiltered medium from the raw side to the clean side. A filter and a filter system with such a filter element are disclosed. The filter system has a pump to supply medium to be filtered to the filter.

A diesel fuel pre-filtering system may include a structure for housing at least two filtering areas, a fuel inlet area, and a fuel outlet area. The system may also include an inspection window including a drain for water, a first filtering area structured to define a restriction connecting between the fuel inlet area and a subsequent filtering area, and a second filtering area structured to define a restriction connecting between a preceding filtering area and the fuel outlet area. The structure and the inspection window may be composed of a thermoplastic material distinct from each other and connected to each other via a permanent bond.

A fluid filter having a filter canister, a fluid inlet, a fluid outlet, filter media, and a pressure sensitive valve assembly is described. The pressure sensitive valve assembly comprises an orifice surround, a pressure relief spring, and a valve plug comprising a valve head and first and second retention legs. The first and second retention legs of the valve plug are spaced apart from one another, extend from a leg base positioned at the sealing side of the valve head to a distal end of the retention leg, and comprise respective seating regions, tapered transition regions, and clearance regions. Each of the respective seating regions comprises a spring engaging hook structurally configured to receive a seating portion of the pressure relief spring. The pressure relief spring is compressed between the orifice surround and the spring engaging hooks to bias the pressure sensitive valve assembly towards the closed state.