Industrial vacuum systems are disclosed, as are filter chambers for industrial vacuum systems and other filtration applications. The filter chambers in these systems use two distinct types of filtering elements within a single chamber, arranging the filter elements such that air cannot pass through a secondary filter element until the air has first passed through and been filtered by a number of primary filter elements. The airflow within the filter chamber may be essentially vertical, and the secondary filter element may be positioned above the primary filter elements. The filter chamber may also include an agitation system for cleaning the filtering elements. The agitation system may be constructed such that it can operate while the system is in use.

A filter (10) for filtering fluid, in particular air, water, fuel, oil, or urea-water solution, in particular of an internal combustion engine, in particular of a motor vehicle, a multiple-bellows hollow filter element (44), a filter housing (30) of a filter (10), and a seal (90) of a hollow filter element (44) are described. The filter (10) comprises at least one filter housing (30), which comprises at least one inlet (28) for fluid to be filtered and at least one outlet (36) for filtered fluid. At least one hollow filter element, in particular a multiple-bellows hollow filter element (44) can be arranged in the at least one filter housing (30) such that it separates the at least one inlet (28) from the at least one outlet (36). The at least one filter housing (30) comprises at least one first housing part (42) having at least one installation opening (40) for the at least one hollow filter element (44), which can be closed using at least one second housing part (38). The at least one hollow filter element (44) comprises at least one filter bellows (46, 48), which comprises at least one filter medium (50), through which flow can occur for filtering of the fluid. The at least one filter bellows (46, 48) at least partially delimits at least one element interior (60, 64). An element axis (32) of the at least one hollow filter element (44) extends coaxially, axially, or in parallel in relation to an installation/removal axis of the at least one hollow filter element (44), in relation to which the hollow filter element (44) can be installed in the filter housing (30) and removed from the filter housing (30) through the at least one installation opening (40) in parallel, axially, or coaxially.

A hollow filter element, in particular a multiple-bellows hollow filter element (44) of a filter (10) for filtering fluid, in particular air, water, fuel, oil, or urea-water solution, in particular of an internal combustion engine, in particular of a motor vehicle, a filter (10), a filter housing (30) of a filter (10), and a seal (90) of a hollow filter element (44) are described. The hollow filter element (44) comprises at least two filter bellows (46, 48), which each comprise at least one filter medium (50), through which flow can occur for filtering of the fluid. The at least two filter bellows (46, 48) at least partially delimit at least one element interior (60, 64). The hollow filter element (44) comprises at least one end body (56, 68, 70) on an axial front and/or rear end side (52, 54) of the hollow filter element (44) with respect to an element axis (32). The hollow filter element (44) comprises at least one seal (90), which is arranged at least partially circumferentially with respect to the element axis (32) in the region of at least one of the end sides (54) of the hollow filter element (44). The at least one seal (90) comprises at least one partially circumferential radial outer and/or radial inner seal section (92, 94), which can cooperate with at least one corresponding sealing surface (100) of a filter housing (30) of the filter (10) to form a radial seal with respect to the element axis (32).

A separating device for separating a liquid from gas is provided with a separating element that has a housing with housing cover closing off an end face of the housing. A filter element is arranged in the housing. A coupling element is provided to couple the separating element to a connector device. The housing cover has a central first gas passage and a second gas passage arranged radially outwardly of the first gas passage. The housing cover has a housing cover thread correlated with the first gas passage. The housing cover thread is to be screwed to a coupling element thread of the coupling element. A fluid discharge channel is arranged within the coupling element for discharging separated liquid from the separating device. The housing cover thread and the coupling element thread, in a position of use of the separating device, are connected substantially seal-tightly to each other.

A filtration element, which includes filtering tubes that are drilled with straight conical holes, and a central supporting tube and connecters/headcaps. The filtering tubes are arranged so that drilled surface portions face outwarded and the remaining undrilled surface portions are positioned adjacent to the central supporting tube. The filtration media can be made of tubular or flat metals or alloys. A plurality of filtration elements can be bundled using specially designed connectors to meet specific requirements for filtering of fine solid particles from liquids or gases or even liquid-gas-solid three phase. These elements can be used for various applications in filtration fields.

An air cleaner is provided. The air cleaner may include a first air cleaning module including a first fan, a first filter, and a first inlet through which air is suctioned in a radial into the first filter; a second air cleaning module provided over the first air cleaner including a second fan, a second filter, and a second inlet through which air is suctioned in the radial direction to the second filter; and an air flow controller coupled with the second air cleaning module and including a third fan to control a flow of the air discharged from the second air cleaning module.

A yoke arrangement is provided including three leg assemblies connected together to releasably mount a filter assembly to a tube sheet. The filter assembly can include a filter element having a first end cap that acts as a spring. The filter assembly can have filter elements with end caps having built in end stops to prevent over-compression.

An air cleaner is provided. The air cleaner may include a first air cleaning module including a first fan, a first filter, and a first inlet through which air is suctioned in a radial into the first filter; a second air cleaning module provided over the first air cleaner including a second fan, a second filter, and a second inlet through which air is suctioned in the radial direction to the second filter; and an air flow controller coupled with the second air cleaning module and including a third fan to control a flow of the air discharged from the second air cleaning module.

An air cleaner is provided that may include a first air cleaning module including a first fan that generates air flow toward a first discharge outlet from a first suction inlet; a second air cleaning module including a second fan that generates air flow toward a second discharge outlet from a second suction inlet; and a divider provided between the first air cleaning module and the second air cleaning module, the divider being configured to block air discharged through the first discharge outlet from being suctioned into the second suction inlet.

A baghouse and filter assembly is provided for at least partially removing particulate matter from a gas stream. The filter assembly includes a first and second filter sections to be coupled together by a coupler for establishing fluid communication between the first and second filter sections when connected. The coupler includes a first coupling portion including an interior passage through which the gas stream can pass in an axial direction between the first and second filter sections and a hook projecting from the first coupling portion. The coupler includes a gasket that sealingly engages both the first and second coupling portions when the first coupling portion is connected with the second coupling portion to form a substantially gas-tight seal.