A filter element for filtering liquids or gases, having a concentrically arranged filter medium with zigzag pleats. The filter medium is provided with end disks on its axial end faces, each end disk having an inside that is connected to the filter medium and an outside that faces away from the filter medium. At least a first end disk carries a valve element which is situated concentrically inside the filter medium. This valve element includes a valve seat which bulges outward above the plane of the outer side of the end disk. The valve element includes a valve body which cooperates with the valve seat and which is arranged on the first end disk so that it is axially movable and is inside of and surrounded by the filter medium.

A reusable fluid filter unit is disclosed. The reusable fluid filter unit encloses a filter and is removably connected to a manifold. In an embodiment, the filter unit includes an end cap that is detachable so as to replace the filter inside the filter unit. In an embodiment, the filter unit may include embossments or other structures that depress a mechanical valve in the manifold when the filter unit engages the manifold.

A filtering membrane module and a filtering apparatus having the same, which is capable of remarkably reducing a vibration of filtering membrane module during an aeration process for a maintenance cleaning of filtering membrane, and preventing a crack from occurring in the filtering membrane module by the vibration, wherein the filtering membrane module comprises a filtering membrane; a header, to which the filtering membrane is potted, including a first lateral side and a second lateral side opposite to the first lateral side; a first coupling unit provided at the first lateral side; and a second coupling unit provided at the second lateral side.

A device for cleaning liquids or gaseous media, having a cup-shaped or pot-shaped housing, having an exchangeable interior precipitating element, a medium inlet for medium to be cleaned, a medium outlet for cleaned medium and a housing cover, removably connected to the housing by a connection. The housing has a first circumferential connector and the housing cover has a compatible second circumferential connector, which can be engaged and disengaged by circumferential twisting relative to each other. The first connector or the second connector have at least one interruption extending in the connector axial direction and the precipitating element has at least one positioning arm which, in the installed state of the precipitating element and when the housing cover is connected to the housing, is received at least partially in the at least one connector interruption, in a position and orientation corresponding to the connector interruption.

A filter cartridge can be used in a filter assembly for a system in an in tank filter for a hydraulic return filter. The filter assembly includes a safety construction to ensure that a cover is not place over the bowl of the filter assembly, without a filter cartridge mounted therein. The safety construction includes a lock arrangement on the cover member arrangement, cooperating with a flange on the tank. Methods of servicing use steps to lock and unlock the lock arrangement.

A filter system and filters and housing components for use in the filter system are provided. The filter system includes at least one filter received within a housing having a cover and a housing body. The filter includes at least one latch tab engaged by the cover to secure the cover. First and second seals seal the system. The latch tab extends axially beyond a catch of the housing body. A filter system is also provided that includes a pre-cleaner through which fluid moves in a first direction different than a second direction as the fluid flows through the filters thereof. Methods of servicing the filter system are also provided.

A device for treating water having a cartridge, which includes a container for receiving treatment means and a connecting head. Furthermore, a connecting device is provided, which is equipped with a holder, a valve device, and a locking device. The holder has at least one side wall, on which the inflow and outflow openings are disposed. The valve device has a valve element, which surrounds the connecting head at least partially and is disposed movably in the holder. The associated cartridge provides at least one inlet opening and at least one outlet opening on at least one side surface. The cartridge has at least one recess and/or a lug for the engagement of a locking element of a locking device of the connecting device.

A filter element for a filter device of an internal combustion engine, in particular a motor vehicle, is disclosed. The filter element for filtering a fluid of the internal combustion engine can be inserted in the direction of an insertion axis along a lateral wall of a filter housing. The filter element has at least one sealing element for fluidically blocking at least one throughflow opening formed in the lateral wall.

A filter unit is provided for filtering a liquid. The filter unit is intended to be connected to a cap including a first liquid passage and a second liquid passage 114. The filer unit includes: a canister; and a filter cartridge rotatably arranged within the canister, the filter cartridge includes a first filter connection for liquid to pass through, the first filter connection is intended to be connected to the first liquid passage in the cap, wherein the canister is intended to be rotatably attachable to the cap such that, when the canister is attached to the cap by a rotating action, the filter cartridge is stationary to the cap.

A liquid filter having a housing and a hollow insert. The housing has a dirty liquid feed, a clean liquid outlet and a drainage channel, and is closed by a detachable cover. In the channel, a valve is arranged, having a valve body axially displaceable between a closed and an open position. The cover on the housing presses the valve body into the closed position. When the cover is removed from the housing, the valve body is carried to its open position and then is detachable from the cover or insert and is retainable in its open position by a spring holding element. The holding element automatically expands into the opening position by spring force and engages a spring element restraint holding the valve body in its open position. A force contracts the spring element, displacing the valve body in the closing direction, releasing engagement with the spring restraint.