An air cleaner is provided that may include a first air cleaning module having a first fan that generates air flow from a first suction inlet toward a first discharge outlet; a second air cleaning module having a second fan that generates air flow from a second suction inlet toward a second discharge outlet; a dividing plate provided between the first air cleaning module and the second air cleaning module; and a display provided at inside of the dividing plate and in which a light source is provided.

A variable efficiency filter media. The variable efficiency filter media is a composite media formed of at least two different types of filter media, such as standard efficiency media and high efficiency media. The variable efficiency filter media has at least two different efficiency levels. The different efficiency levels can be spread across different zones. The filter media types for both the standard and high efficiency media can be spun media, melt blown media, nanofiber media, micro-glass media, cellulose media, carded staple fiber media, and the like. The variable efficiency filter media may be produced by any of an air laid or wet laid process.

The disclosure relates to a filter cartridge for removing impurities from a stream of raw gas to be filtered, including a cylindrical filter element which is made of a filter material and in which a filter insert is inserted, an interior space being formed between the filter element and the filter insert, the filter material being designed to be cleaned when a stream of compressed air is applied against a flow direction of the stream of raw gas, a cap designed as a flow guiding device being provided for guiding the stream of compressed air, wherein the cap is arranged such that it projects beyond an axial length of the filter element in the axial direction. The disclosure further concerns a filter system for removing impurities from a stream of raw gas to be filtered. In addition, the disclosure relates to a method for cleaning such a filter cartridge.

A Diesel Particulate Filter (DPF) assembly configured to be incorporated in the exhaust gas stream, the DPF assembly comprising: Quartz/Composite ceramic mixture disposed as filter elements, mechanical support components and optional electrical soot removal solutions including electrical, di-electrical and microwave solutions.

A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.

An upper end cap is attached to an upper end portion of a filter assembly, and the upper end cap includes an inner peripheral wall that is fitted into a central space portion of an inner-filter member, an intermediate wall that surrounds the outer periphery of an outer-core member, and an outer peripheral wall that surrounds the outer periphery of an outer-filter member. The height of the intermediate wall is smaller than the height of the outer peripheral wall and the height of the inner peripheral wall. The inside of the upper end cap is filled with adhesive having a depth that enables the intermediate wall to be embedded in the adhesive, and the upper end portion of the filter assembly is bonded to the upper end cap in a state where the upper end portion is inserted in the adhesive.

A first filter element of a filter system is arranged in a housing, with a second filter element arranged coaxially and concentrically inside the first filter element. The first filter element has a first end disk at a first outlet-side end face and a second end disk at a second oppositely positioned end face. First and second end disks each have a central opening and extend annularly about the respective end face. The second filter element has a first outlet-side end face and a second oppositely positioned end face. The second end face of the second filter element is closed fluid-tightly by a cover. The cover closes the opening in the second end disk of the first filter element fluid-tightly. Between the second end faces of the first and second filter elements, a seal interface is arranged sealing directly the first and second filter elements against each other.

A first filter element of a filter system is arranged in a housing, with a second filter element arranged coaxially and concentrically inside the first filter element. The first filter element has a first end disk at a first outlet-side end face and a second end disk at a second oppositely positioned end face. First and second end disks each have a central opening and extend annularly about the respective end face. The second filter element has a first outlet-side end face and a second oppositely positioned end face. The second end face of the second filter element is closed fluid-tightly by a cover. The cover closes the opening in the second end disk of the first filter element fluid-tightly. Between the second end faces of the first and second filter elements, a seal interface is arranged sealing directly the first and second filter elements against each other.

A device is provided that provides an unbiased filtration effect and an effect of removing captured substances through backwashing by causing a fluid to uniformly pass through a filter element over the entire length in an axial direction at the time of backwashing so as to efficiently rotate a captured-substance removal tool in a filtration unit 1 which includes the captured-substance removal tool 20 axially supported inside the tubular filter element 2 to be rotatable.

The invention features a filtration segment having a top seal, a bottom seal and a primary filter core and the method of filtering with the design of the filtration segment. The primary filter core is operatively coupled to at least one opening which is located either on the top seal or on the bottom seal. The filtration segment also includes one or more interior filters surrounding the primary filter core. Each interior filter includes a filter material surrounding a secondary core which is operatively coupled to at least one opening which is located either on the top seal or on the bottom seal. Each filter may optionally include a retaining medium enclosing the filter material. The filtration segment has one or more layers of an exterior filter media which operatively surround the interior filters and are operatively coupled to the top seal and the bottom seal.