A water separator element (14) for a fuel filter (10) having two water level electrodes (34, 36) for detecting backed-up water in a water collection chamber (32) of the fuel filter (10). The water level electrodes (34, 36) can be electrically contacted by means of two contact electrodes (40, 42), said contact electrodes (40, 42) being connected in an electrically conductive manner to the water level electrodes (34, 36). The disclosure further relates to a fuel filter comprising a water separator element of this type.

One embodiment is a filter element including an outer filter media and an inner filter media. The outer filter media is operable to remove particulates present in a flow of fluid and/or coalesce water contained in the flow of fluid. The inner filter media is operable to remove particulates from the flow of fluid, separate water form the flow of fluid, and remove particulates from the flow of fluid. Other embodiments include unique apparatus, devices, systems, and methods relating to fuel filters and filtration. Further embodiments, forms, objects, features, advantages, aspects, and benefits of the present application shall become apparent from the detailed description and figures included herewith.

A filter element is provided with a folded bellows that has a first pleated section with parallel arranged first pleats and a second pleated section with parallel arranged second pleats. The first pleats of the first pleated section are positioned at an angle relative to the second pleats of the second pleated section. The end face edges of the first pleats of the first pleated section adjoin a first clean chamber. The end face edges of the second pleats of the second pleated section adjoin a second clean chamber. The second clean chamber is delimited by a longitudinal side of an edge-side pleat of the first pleated section. The first and second clean chambers are connected to each other. A filter insert with such a filter element is provided.

The disclosure pertains to a spin-on fluid treatment device, including a treatment medium disposed within a housing, a top surface having an internally threaded bore and an outlet tube at least partially disposed inside said threaded bore in a concentric position. The outlet tube can have an externally oriented sealing portion for engaging with a complementary element of an inlet spud of an entity that receives said treated fluids. The outlet tube can be configured as an alignment feature to guide the treatment device onto the inlet spud during installation. The outlet tube can be configured with both an externally oriented sealing portion and an alignment feature. The disclosure also pertains to a system comprising a machine having a treatment device head and a spin-on fluid treatment device, a kit, a spin-on fluid filter cartridge, and a method of mounting a spin-on filter cartridge onto a filter head.

A filter element comprises one or more several tubular filter media element segments, which may be pleated filter media ring segments. One or more heat activated disks are used to connect each tubular filter media element segments together and/or to connect tubular filter media element segments with one or more end cap supports. The heat activated disks are solid in form for assembly with tubular filter media ring segment and then heat activated to bond with tubular filter media ring segments. Multiple end caps can be simultaneously bonded to one or more tubular filter media element segments if a filter stack assembly of component are heated together, such as in an oven. Filter media may also be simultaneously cured. Heat activated disks may be used as pleat stabilizers and/or for and/or as part of end caps.

A deaeration system is disclosed. A preliminary filtration stage is configured to filter particles from and nucleate gas in a fluid stream to create a filtered fluid stream. A primary filtration stage is downstream of the preliminary filtration stage configured to separate the filtered fluid stream into a first liquid stream and an air cavity concentrate stream. A secondary filtration stage is configured to receive the air cavity concentrate stream and separate the air cavity concentrate stream into a second liquid stream and a gas stream.

An oil filter that includes an outer filter and an inner filter. The inner filter is placed inside the outer filter, creating a space between them. This space is connected to an outlet. The inner filter also has an inlet that allows fluid to flow into its interior.

A filter assembly includes a filter element and a filter housing. The filter housing includes a shell defining an inner cavity, and a lid configured to engage the shell at an opening of the inner cavity. The filter element is disposed within the inner cavity and includes a media pack, a first endplate, and a sealing member. The first endplate is sealingly engaged with a media pack first end and includes a skirt extending along a longitudinal axis of the media pack from the first end toward the second end. The sealing member is coupled to the skirt and is positioned between and forms a seal between the lid and the shell.

A composite filter cartridge is adapted to filter raw water to produce purified water, and includes an inner carbon tube, an outer carbon tube, a first end cap, a second end cap, and a plurality of resin granules. The inner carbon tube defines a water outlet channel adapted to output the purified water. The outer carbon tube is concentric with the inner carbon tube, and is spaced apart from the inner carbon tube. The first and second end caps respectively limit two ends of the inner and outer carbon tubes. The first end cap closes an end of the water outlet channel. The second end cap has a water outlet communicating with the water outlet channel. The second end cap cooperates with the inner carbon tube, the outer carbon tube, and the first end cap to define a resin granule accommodation space where the resin granules are accommodated.