The disclosure relates to an air filtering apparatus (1) configured to provide intake air to an engine, said apparatus comprising: a filter chamber (2) comprising an air inlet opening (3), and an air outlet opening (4); a weather protection hood (5) arranged on the air inlet side of the filter chamber, said weather protection hood having an air intake opening (6) facing downward and an outlet opening (7) being connected to the air inlet opening (3) of the filter chamber; a pulse filter arrangement (8) comprising one or more pulse filters (9); a static filter arrangement (10) located at the air outlet opening (4); where the pulse filter arrangement (8) is arranged inside the weather protection hood (5) and in that a maintenance space (11) is provided in the filter chamber (2) on a downstream side of the pulse filter arrangement (8), through which the filters (9) of the pulse filter arrangement can be replaced.

The disclosure relates to an air filtering apparatus (1) configured to provide intake air to an engine, said apparatus comprising: a filter chamber (2) comprising an air inlet opening (3), and an air outlet opening (4); a weather protection hood (5) arranged on the air inlet side of the filter chamber, said weather protection hood having an air intake opening (6) facing downward and an outlet opening (7) being connected to the air inlet opening (3) of the filter chamber; a pulse filter arrangement (8) comprising one or more pulse filters (9); a static filter arrangement (10) located at the air outlet opening (4); where the pulse filter arrangement (8) is arranged inside the weather protection hood (5) and in that a maintenance space (11) is provided in the filter chamber (2) on a downstream side of the pulse filter arrangement (8), through which the filters (9) of the pulse filter arrangement can be replaced.

An air quality indicator for indicating high fine particle levels in an environment of interest. The indicator includes a frame maintaining first and second air filter media. The first air filter medium differs from the second air filter medium at least in terms of a change in visual appearance (e.g., color) when subjected to air flow containing fine particles.

A filter for compressed air systems is provided. The filter includes a filter housing with a filter therein between an air inlet and an air outlet. Compressed air flowing between the air inlet and the air outlet passes through the filter housing and the filter element. A base is removably fastened to the filter housing which may be separated from the filter housing to allow the filter element to be removed and replaced.

A filter element includes a media pack and a gasket member. The gasket member includes first and second gasket regions separated by a channel. The elements are usable in a dust collector having a dirty air inlet, a clean air outlet, and a tubesheet dividing between an unfiltered and a clean air volume. An element is removably mounted and sealed within the tube sheet. At least one projection angled relative to a plane of the tube sheet extends into the channel of the gasket member. A method of servicing a dust collector includes removing a first filter element from the tube sheet in the housing, and then sealing a second filter element against the tube sheet by orienting at least one projection extending from a plane of the tube sheet into a channel defined by a gasket member secured to the second filter element. An axial force is exerted to form a seal between the gasket member and the tube sheet.

A switchable two-stage coalescence separation system, including a coalescer housing (1), a plurality of two-stage filter elements (2), and a particle detector (5). A lower portion and an upper portion of each of the two-stage filter elements (2) are located in a lower chamber (101) and an upper chamber (102) of the coalescer housing (1), respectively. Two gas inlet branch pipes are communicated with the lower chamber (101) and the upper chamber (102), respectively and are connected to a gas inlet main pipe (8) through a first multi-way valve (6). The particle detector (5) is disposed on the gas inlet main pipe (8). Two outlet branch pipes are communicated with the lower chamber (101) and the upper chamber (102), respectively and are connected to a gas outlet main pipe 13 through a second multi-way valve (7).

A switchable two-stage coalescence separation system, including a coalescer housing (1), a plurality of two-stage filter elements (2), and a particle detector (5). A lower portion and an upper portion of each of the two-stage filter elements (2) are located in a lower chamber (101) and an upper chamber (102) of the coalescer housing (1), respectively. Two gas inlet branch pipes are communicated with the lower chamber (101) and the upper chamber (102), respectively and are connected to a gas inlet main pipe (8) through a first multi-way valve (6). The particle detector (5) is disposed on the gas inlet main pipe (8). Two outlet branch pipes are communicated with the lower chamber (101) and the upper chamber (102), respectively and are connected to a gas outlet main pipe 13 through a second multi-way valve (7).

The disclosure relates to an apparatus for reducing the quantity of solid particles in ambient air. A predefined treatment area is delimited at least in part by an enclosure. The enclosure is at least partially non-physical and formed by at least one air curtain that can be produced by an air flow generating device. At least one air filter device, which is connected in terms of flow to the ambient air of the treatment area is designed to filter solid particles directly out of the ambient air of the treatment area.

In order to provide a filter system for separating off contaminants from a stream of untreated gas that contains contaminants that is of simple construction and is operable efficiently, it is proposed that the filter system should include the following: a base construction through which the stream of untreated gas is guidable and which includes at least one filter module receptacle for receiving at least one filter module, and at least one filter module which is selectively arrangeable on and/or in the at least one filter module receptacle and/or removable therefrom, wherein the at least one filter module includes a plurality of filter element receptacles for receiving a plurality of mutually independent filter elements.

In order to provide a filter system for separating off contaminants from a stream of untreated gas that contains contaminants that is of simple construction and is operable efficiently, it is proposed that the filter system should include the following: a base construction through which the stream of untreated gas is guidable and which includes at least one filter module receptacle for receiving at least one filter module, and at least one filter module which is selectively arrangeable on and/or in the at least one filter module receptacle and/or removable therefrom, wherein the at least one filter module includes a plurality of filter element receptacles for receiving a plurality of mutually independent filter elements.