Abstract: Filtration apparatus are disclosed. An example filtration apparatus includes a housing including a plurality of walls defining a cavity, a filter located in the cavity, and a cleanout system coupled to the housing. The cleanout system includes a cleanout passageway between an outer surface of the housing and the filter. The cleanout system includes a cleanout inlet accessible from the outer surface of the housing and a cleanout outlet in fluid communication with the filter. The cleanout system enables removal of particulate from the filter without removing the filter from the housing.

Abstract: A filter cartridge configured to be removably positionable within an inner opening of a housing, wherein the filter cartridge includes a media pack having an inlet end, an outlet end, and an outer surface having an outer peripheral shape, at least one of: (a) a frame member at least partially surrounding the media pack, the frame member including a frame wall having a shape that is different from the outer perimeter shape of the media pack; and (b) a shell at least partially surrounding the media pack, the shell including a shell wall having a shape that is different from the outer perimeter shape of the media pack, and a sealing member extending at least partially around the inlet end of the media pack, wherein the sealing member connects the media pack to at least one of the frame member and the shell.

Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.

Abstract: A cyclone filter includes an air cyclone. A cyclone chamber is connected to the air cyclone. The cyclone chamber includes a cyclone constriction path and a crossflow filter. A return path portion is connected externally to the cyclone chamber.

Abstract: A rigid, channel-framed, non-compressible, non-nestable, pleated air filter, comprising: a tightly-pleated air filter media comprised of a nonwoven fibrous web and with an upstream face and a downstream face, wherein the tightly-pleated air filter media comprises a plurality of upstream (and downstream) pleat tips and upstream (and downstream) pleat valleys, the tightly-pleated air filter media comprising a plurality of upstream (and downstream) linear bridging filaments that are at least substantially parallel to each other and are oriented at least substantially orthogonal to the pleat direction and are extrusion-bonded to at least some of the upstream (and downstream) pleat tips, and, a channel frame comprising four major frame portions, with each major frame portion being mounted on one of the four major edges of the pleated air filter media.

Abstract: An air-oil separation system for a gas turbine engine system comprises a housing that extends circumferentially around an axis to define an interior chamber of the housing and a separation unit located in the chamber. The housing is formed to include an inlet configured to receive a mixture of air and oil, an oil outlet configured to conduct oil to exit the housing, and an air outlet configured to conduct air to exit the housing. The air-oil separation unit separates air from the oil.

Abstract: A filter system for a containment through which a gas flows, comprising at least one filter unit. First docking means on the filter unit removably connect the filter unit to a receiving port of the containment. The filter unit further has a closure element having an adjusting mechanism to block and open an entry into the filter unit. A drive unit can be connected to the adjusting mechanism. The connection between the adjusting mechanism and the drive unit is preferably dockable. The drive unit has a motor preferably in the form of an electric motor with a pinion or a gear. The transmission ratio of the motor to the transmission part is greater than 1:20, preferably greater than 1:30, for example 1:33. A control unit can switch and monitor the position of a plurality of closure elements according to a program. The adjusting mechanism can also be actuated manually.

Abstract: A support structure for an interior volume of a construction of pleated media is operably oriented in the interior volume and structurally supports the media. The support structure can pass directly through an innermost 60% of the interior volume. It can have a void volume not more than 80%. It can be inner liner-free and extend in a non-curved path. It can include a first sheet and second sheet of porous material. At least a first brace construction secures the first sheet and second sheet together and in spaced apart, opposing relation. The support structure can include a pleated construction having pleats extending in a direction non-parallel and angled to the direction of pleats of the pleated filter media. The support structure can be molded spacers.

Abstract: The present disclosure relates to a process for removal of an aerosol, comprising the steps of directing a process gas comprising an aerosol to contact an inertial demister providing a first demisted process gas, and directing the first demisted process gas to contact a coalescing demister providing a second demisted process gas, characterized in said first inertial demister being more open than said coalescing demister, where more open is defined as having a higher void fraction or a lower density with the associated benefit of such a process providing an efficient removal of a large volume of liquid from the inertial demister, while avoiding flooding of the demister system. It further relates to a process plant for sulfuric acid production employing such a pair of demisters.

Abstract: Filter assemblies are described and shown. Components, features and methods of assembly and use are described. Many of the principles relate to preferred cartridge configurations for engagement with selected housings. Selected optional features described can be used to provide indication to a service provider that a proper cartridge is not positioned appropriately in the housing for use.

Abstract: This gas-liquid separator is provided with: a tank part which stores and separates a refrigerant; and a pipe connection part forming outlet/inlet ports for the refrigerant from the tank part. The pipe connection part has: a first connection part having a first connection pipe which guides the refrigerant to an expansion valve; a second connection part having a second connection pipe through which the cooled refrigerant returns; a third connection part having a third connection pipe which guides the refrigerant to a compressor; a fourth connection part having a fourth connection pipe which guides the refrigerant into the tank part from an outdoor heat exchanger; and a first flow path switching valve which allows the inside of the tank part to communicate with the third connection pipe during heating operations, and allows the second connection pipe to communicate with the third connection pipe during cooling operations.

Abstract: A filter cartridge for cleaning an air flow includes a base, a cover provided with a central recess, and at least one pleated filter element arranged between the cover and the base. The at least one filter element encloses an interior space. The cover has a venturi nozzle, and the venturi nozzle engages in the pleated filter element. The venturi nozzle is spread out in comb-like fashion in the region of its end engaging in the filter element.

Abstract: A method of making a filter cap by die stamping a composite sheet to form the filter cap where the composite sheet includes: a sheet metal layer having a planar surface; and a heat liquefiable adhesive that is adhered to the planar surface of the sheet metal layer and is solid at room temperature.

Abstract: A separator apparatus is described for separating liquids and solids from a gas. The separator apparatus includes a reverse flow cyclone comprising a cylindrical section, a conical section, and a top, the cylindrical section having a feed inlet, the top having a gas outlet, and the conical section having a reject outlet at the bottom thereof. An axial cyclone is disposed in the cylindrical section, the axial cyclone oriented with a first end located proximate to the top of the apparatus and a second end opposite the first end, the axial cyclone having a tapered entrance fixture at the second end thereof and having a wall with a plurality of openings located between the first end of the axial cyclone and a midpoint of the axial cyclone. A drain plate is coupled to the cylindrical section below the openings of the axial cyclone.

Abstract: A two-stage separator system having a housing extending between a first end and a second end. The housing defines a housing inlet, a separator outlet towards the second end, and a filtration outlet on the first end. A filter assembly has a first sheet of filter media coupled to a second sheet of filter media mutually defining a plurality of flutes extending in an axial direction. The filter assembly defines an inlet flow face and an outlet flow face. The filter assembly is disposed in the housing and coupled to the housing about the filtration outlet such that the outlet flow face is in fluid communication with the filtration outlet. The inlet flow face of the filter assembly has an axial flow face length.

Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium (10) has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A thickness of the first porous PTFE membrane is in the range of 4 to 40 ?m and a specific surface area of the first porous PTFE membrane is 0.5 m2/g or less.

Abstract: A concentrating apparatus for concentrating compressed air includes a first hollow cylindrical concentrating unit which is adapted to cause compressed air to: (i) collide with an upstream side of a collision plate so as to be concentrated and partially liquefied; (ii) move to an annular passage and be jetted into an air moving chamber so as to be adiabatically expanded and partially liquefied; (iii) be compressed in an air compressing passage and pushed out so as to retreat along a conical partition wall; (iv) collide with a downstream side of the collision plate so as to be concentrated and partially liquefied; (v) be introduced into an upstream end of an outlet tube; and (vi) move to a downstream end of the outlet tube and into a second hollow cylindrical concentrating unit.

Abstract: An air filter arrangement is disclosed. The air filter arrangement includes media comprising corrugated media secured to facing media and defining a media pack having opposite flow faces. Media pack arrangements including such media are described. Also described are filter cartridges including such media packs and air cleaners including the filter cartridges. Advantageous housing seal arrangements having a pinch seal member and forming a trough are described. Methods of assembly and use are also provided. Also, systems of use are described.

Abstract: According to the present disclosure, air cleaner assemblies, components, features, and methods relating thereto, are described. These features, in part, relate to configuration of a preferred seal arrangement and seal surface of the cartridge. Particular arrangements are shown, in which: the filter cartridge includes a seal arrangement having a axial pinch seal surface with a projection/recess contour including at least one projection thereon; and, the cartridge includes a seal contour projection stabilizing portion at a location in perimeter alignment with the portion of the seal pinch arrangement including the first housing engagement projection. Additional features are included that relate to clean air separator section tubes of a precleaner arrangement secured to a cartridge. These features can be used in cartridges including features outlined above, or in alternative cartridges. Additional features of air cleaner arrangements and filter cartridges in accord with the above are described.

Abstract: Air cleaner assemblies, components, and features are described. The features can be used to provide that the air cleaner assembly cannot be fully closed, even if a cartridge is nested therein, and appears to be sealed, unless that cartridge is a proper one for the system of concern. The effect is to prevent an inappropriate cartridge, that does not properly seal, from being inadvertently installed in the assembly.