Abstract: A controlled and closed agricultural system includes a growing space and an air handling system having an enthalpy wheel and cooling coil. The enthalpy wheel is capable of transferring sensible and latent heat and is positioned in and rotatable through a recirculating air duct and an outside air duct. The recirculating air duct is in fluid connection with the growing space and one or more recirculation fans, while the outside air duct is in fluid connection with one or more outside air fans positioned to cause outside air to flow countercurrent to recirculating air. A cooling coil is positioned within the recirculating air duct, downstream of and in series with the enthalpy wheel. The cooling coil circulates a heat transfer fluid to remove additional heat from the recirculating air.

Abstract: A device for cleaning of polluted gas from a combustion engine, includes a centrifugal separator with a centrifuge rotor arranged to cause the polluted gas to rotate. The centrifuge rotor comprises a stack of truncated conical separating discs disposed at mutual spacing so they delimit intermediate spaces between them for the gas to flow through. An outlet chamber is disposed centrally within the stack of separating discs, whereby the centrifuge rotor is configured for counterflow separation. The centrifugal separator comprises a gas outlet which communicates with the outlet chamber. The stack of separating discs is disposed for rotation in a space formed within the combustion engine and arranged to receive the polluted gas, to which end the intermediate spaces between the separating discs communicate directly with the space, and the gas outlet is arranged to conduct the cleaned gas out from the space through a wall which delimits the space.

Abstract: A gearbox includes an inlet configured to receive a mixture of air and oil from an external source and a deoiler. The deoiler includes a shaft including an inlet passage and an outlet passage, both formed on an inner portion of the shaft and separated from one another, a separator unit coupled to and surrounding a portion of the shaft and including an inlet and an outlet and a pre-pressuring component coupled to the shaft that increases the pressure of the mixture of oil and air to form a pressurized mixture and provides the pressurized mixture to the inlet of the separator unit.

Abstract: An assembly includes a housing having a housing cavity, an inlet, and an outlet, a rotatable shaft positioned proximate the outlet, and a seal positioned at an interface of the rotatable shaft and the housing. The seal includes porous material adjacent the shaft and the housing and a shell substantially separating the porous material from the housing cavity. The shell includes an inlet that allows fluid flow from the housing cavity to the porous material and an outlet that allows fluid flow from the porous material to the housing interior. The inlet is positioned radially inward of the outlet.

Abstract: A gas-liquid rotating separator has first and second sets of magnetically permeable members magnetically interacting with each other to effect rotation of a separator element. A nonauthorized replacement separator element missing the second set of magnetically permeable members will not effect designated operation, thus ensuring, at maintenance servicing, installation of an authorized replacement separator element.

Abstract: A separation device for removing at least part of a liquid from a mixture which comprises a gas and the liquid in the form of droplets, comprises: a) a housing comprising first, second and third separation sections for separating liquid from the mixture, wherein the second section is arranged below the first section and above the third section, the respective sections are in communication with each other, and the second section comprises a rotating coalescer element; b) tangentially arranged means to introduce the mixture into the first section; c) means to remove liquid from the first section; d) means to remove liquid from the third section; and e) means to remove a gaseous stream, lean in liquid, from the third section. A separation process for removing at least part of a liquid from a mixture comprising the liquid in the form of droplets using the separation device.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: A deoiler including a hub mounted on the vent shaft and a cover mounted on the hub between two stop faces which fix the cover avoiding the need to weld or bolt the cover.

Abstract: A centrifugal oil separator (3) provided with a metallic foam structure (4) and at least one high-voltage discharge electrode (5) arranged upstream of the metallic foam structure (4) is a component of a hollow engine shaft (2), with the metallic foam structure (4) and the high-voltage discharge electrode(s) (5) being integrated into the engine shaft (2) and energy transmission to the high-voltage discharge electrodes (5) being transformatory. Such a centrifugal oil separator, space-savingly arranged in an engine shaft, enables a high rate of oil separation to be achieved despite the centrifugal forces being low in particular in the area of the engine shaft, thus ensuring low oil consumption and preventing oil-contaminated air from getting into the atmosphere.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: On a centrifugal oil separator for an aircraft engine for separating the oil particles contained in the vent air, a metallic foam body (7), into which the loaded vent airflow (3) is introduced, is firmly integrated into a hollow-type engine shaft (1), while high-voltage electrodes (6), which electrostatically charge the oil droplets in the vent air, are arranged outside the engine shaft (1) within the vent airflow (3) forwarded to the engine shaft (1). The simply designed oil separator, which can be space-savingly arranged and cost-effectively produced, ensures efficient separation of even minute oil droplets from the air-oil mixture.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: The present invention relates to a separator and more specifically, but not exclusively, to a centrifugal separator for the cleaning of a gaseous fluid. A centrifugal separator is provided as comprising a housing defining an inner space, and a rotor assembly for imparting a rotary motion onto a mixture of substances to be separated. The rotor assembly is located in said inner space and is rotatable about an axis relative to the housing. The rotor assembly comprises an inlet for receiving said mixture of substances, an outlet from which said substances are ejected from the rotor assembly during use, and a flow path for providing fluid communication between the inlet and outlet, wherein the outlet is positioned more radially outward from said axis than the inlet.

Abstract: A gearbox that includes an inlet configured to receive a mixture of air and oil from an external source and a deoiler. The deoiler includes a shaft including an outlet passage formed on an inner portion of the shaft, a separator unit coupled to and surrounding a portion of the shaft and including an inlet port, and a synchronizer including one or more blades and that is coupled to the shaft proximate the inlet port.

Abstract: Separation systems can utilize a combination of forces to separate constituent components of a working fluid from each other. Some separation systems utilize one or more of centrifugal and gravitational forces in the purification of hydrogen gas. Some separation systems can utilize one or more of electromotive and magnetic forces in the purification of hydrogen gas.

Abstract: A cyclone separator arrangement is made by forming a hollow cylindrical wall, making an L-shaped cut beginning at a first open end of the wall to form a flap, bending the flap inwardly to form a tangential inlet, enclosing the open end of the wall, and providing an outlet tube extending through the first end into the interior of said cylindrical wall along the central longitudinal axis.

Abstract: A system of sampling a fluid comprises a fluid separator having a central axis. The fluid separator includes an insulating sleeve. In addition the fluid separator includes a separator assembly coaxially disposed within the sleeve. Further, the fluid separator includes an annulus radially disposed between the sleeve and the separator assembly. The separator assembly includes a conduit, a support rod coaxially disposed within the conduit, and a plurality of separator members coupled to the support rod within the conduit.

Abstract: The present invention relates to a system and method for the separation of gaseous components from gaseous mixtures in order to control emissions and treatment of the gaseous components. In one embodiment, the system makes use of a fan or gas moving device to first impose centrifugal forces on gas streams as the gas moves from the center of the fan toward the periphery of the fan housing. Heavier gases are forced to the outer regions of the fan housing while lighter gases remain closer to the fan axis. The heavier gases and lighter gases exiting the fan housing flow into a duct at different flow rates, and the heavier gases are diverted from the larger volume gas streams and then processed.

Abstract: An oil separator rotor for a turbomachine, including a tubular hub that includes an external annular flange and an annular cover which, in cross section, is substantially L-shaped and mounted around the hub. The hub flange includes, at its external periphery, a mechanism to radially retain the free end of the cylindrical wall of the cover, so as to center this end and prevent it from deforming in the radially outwards direction under the effect of centrifugal force.

Abstract: A system of sampling a fluid comprises a fluid separator having a central axis. The fluid separator includes an insulating sleeve. In addition the fluid separator includes a separator assembly coaxially disposed within the sleeve. Further, the fluid separator includes an annulus radially disposed between the sleeve and the separator assembly. The separator assembly includes a conduit, a support rod coaxially disposed within the conduit, and a plurality of separator members coupled to the support rod within the conduit.

Abstract: A compressor incorporated with an oil separator having a separation chamber and communication holes. The separation chamber is placed adjacent to a discharge chamber, has a space formed in the entire inside of the separation chamber, separates oil-containing gas, which is introduced into the separation chamber, into gas and oil by centrifugal separation, allows the separated oil to drop downward, and upwardly extracts the separated gas. The communication holes interconnect the discharge chamber and the separation chamber and introduce the oil-containing gas, coming from the discharge chamber, into the separation chamber. The communication holes are arranged in the separation chamber, in a direction extending from a gas release side to an oil drop side. The structure of an oil separation section is simplified to improve productivity and reduce cost, and a high degree of design freedom of the position of a discharge port is obtained.

Abstract: Device (34) for separating particles and/or drops of solid/fluid material out of a fluid, which device has a cyclone (14) with an inlet (16) and an outlet (28). The device also has a centrifuge (36) that is arranged to separate particles and/or drops of solid/fluid material from the outlet fluid in the cyclone (14). The centrifuge (36) is located downstream of the cyclone (14) and is located in the cyclone (14). The centrifuge's axis of rotation is arranged to extend in the same direction as the cyclone's axis of rotation. The centrifuge (25) has a plurality of lamellae (40) that is arranged coaxially on a shaft (42) at a distance from one another so that fluid channels are formed between adjacent lamellae (40) and so that fluid flows in between adjacent lamellae (40) in a direction from the lamellae's periphery (40p) towards the shaft (42) when the centrifuge (36) is in use.

Abstract: A separation housing houses a rotor with multiple suspension chambers. Each chamber has a radially extending web portion between two rotating discs. An orifice is provided through the radially extending web portion. Another web portion urges gas radially out of the rotor. Passages through the rotating disks permit entry of gas and solid particle mixtures into the suspension chambers at high speed traveling toward each other in a suspension adjacent to the orifice. The web portion that urges gas out of the chamber pulls gas away from the suspension zone. Gas moving through the aperture and into a clean gas chamber pulls gas in the opposite direction. The result is gas in the suspension zone being fixed relative to the rotor or changing direction. Centrifugal force moves solid particles radially out of the chamber.

Abstract: A forced air open-ventilation systems for cooling electrical machines is provided. The forced air open-ventilation system includes an air cleaner having an air chamber with a first end, where air is drawn in from the surroundings, and a second end, opposite the first end, where air is drawn out of the air chamber, via a first outlet. A rotating means is contained within the air chamber and may be driven to rotate about an axis that extends between the first end and the second end of the chamber. The rotating means applies a centrifugal force to any airborne particles entering the air chamber and throws them radially outwards from the central axis. These particles are then drawn out of the air chamber, via at least one second outlet formed adjacent to a radially outer edge of the rotating means, by a high-velocity outlet stream of the open-ventilation system.

Abstract: A drum is for a rotary separator including a shaft rotatable about a central axis. The drum includes an inner drum member having inner and outer circumferential surfaces and being disposed generally about the shaft such that a first flow passage is generally defined between the inner drum member inner surface and the shaft. The inner drum inner surface is configured to separate liquids from a fluid flow contacting the surface. An outer drum member has inner and outer circumferential surfaces and is disposed generally about the inner drum member such that a second flow passage is generally defined between the outer drum member inner surface and the inner drum member outer surface, the second flow passage being generally coaxial with the first flow passage. Further, the outer drum inner surface is also configured to separate liquids from a fluid flow contacting the surface.

Abstract: A de-oiler system for an aircraft engine including a casing defining a volume containing a rotary shaft and a mixture of air and oil for processing is disclosed. The system includes a hollow rotary axle; a de-oiler structure fastened to the hollow rotary axle and rotating together with the hollow rotary axle, the de-oiler structure having an inlet first face communicating with the volume and an outlet second face connected to a passage formed in the hollow rotary axle; and a transmission device between the hollow rotary axle and the rotary shaft for communicating to the hollow rotary axle a speed of rotation V about its axis in such a manner that the speed of rotation V is greater than a speed of rotation v of the rotary shaft.

Abstract: The present invention provides a free vortex air-oil separator that may be used in systems for separating oil from air oil mixtures. The free vortex air-oil separator comprises a free vortex chamber having a first chamber wall, a second chamber wall located axially aft from the first chamber wall and a rim located in a radially outer region from an axis of rotation, a plurality of vent holes in the rim and a cavity formed by the first and second chamber walls, and the rim, wherein a free vortex is created when there is a flow into the cavity through the plurality of vent holes.

Abstract: A compact suction and separation device is shown and described. The suction and separation device includes a pump and a separator. The pump includes a vertically oriented rotary vane pump comprising a suction inlet and an exhaust outlet. The separator includes a collector configured to receive combinations of solids, liquids and air. The separator separates solids and/or liquids from the air. Air from the separator is routed from an air discharge into the suction inlet of the pump. Solids and/or liquids are drained from a liquids/solids discharge of the separator. The separator may be gravity-based or centrifuge-type separator driven by the pump motor.

Abstract: A system and method for supplying clean dry gas to gas seals of a compressor. The system uses a rotary separator magnetically coupled to a source of rotational power, along with a gas stream cooling unit configured to condensate liquids out of a wet gas stream before the wet gas stream is supplied to the rotating separator. The system may further include a gas stream pressure booster, a heating unit to heat a dry gas stream generated by the rotary separator, and a controlled recirculation loop configured to continually recirculate the wet gas through the driven rotary separator until a desired amount of condensates are removed from the wet gas stream.

Abstract: Vortex gas separation is forced in radial counterflow between counter-rotating coaxial centrifugal impellers. Feed is at the axis of rotation. Axial extraction of nitrogen and water vapor is driven by an axial pump and by back pressure from the tank while radially outward flow of carbon dioxide and scrubbing targets is driven by the impellers. Scrubbing of the concentrated targets is in high turbulence during a long residence time. Tiny centrifugation effects of innumerable turbulent eddy vortices in a shear layer between the impellers and in the tank are integrated by the forcing regime of the impellers and the axial pump. Radial vortices caused by shear between the counter-rotating impellers provide coherent sink flow conduits for axial extraction of nitrogen ballast. Fine fly ash (PM-2.5) scrubbing is concurrent with NOx and SOx scrubbing and with carbon capture.

Abstract: This invention relates to a liquid-gas separator (1), namely for a vacuum cleaner, including, on the one hand, an upstream conduit (3) and a downstream conduit (4) connected through a communication opening (9) and, on the other hand, mounted mobile in rotation inside either conduit, filtering means (5), pervious to gas, and designed capable of conveying by centrifugation the liquid collected at its periphery. It is characterized in that said filtering means (5) constitutes means for closing said communication opening (9).

Abstract: A module mountable in the crankcase of a vehicle for removing gases therefrom including a housing having an opening communicable with the crankcase, a set of bearings disposed in such housing, a hollow shaft journaled in such bearing having first and second partitions providing first and second axially disposed chambers, cooperating with said housing to provide first and second annular chamber, such shaft having a passageway intercommunicating the first axial chamber and the first annular chamber, a passageway intercommunicating the first axial chamber and the second annular chamber and a passageway intercommunicating the second axial chamber and the second annular chamber, a spiral, centrifugal separator mounted on such shaft in the first annular chamber, and a pillar mounted on the shaft in the second annular chamber and means connectable to motive means for rotating such shaft.

Abstract: A rotary phase separator system generally includes a step-shaped rotary drum separator (RDS) and a motor assembly. The aspect ratio of the stepped drum minimizes power for both the accumulating and pumping functions. The accumulator section of the RDS has a relatively small diameter to minimize power losses within an axial length to define significant volume for accumulation. The pumping section of the RDS has a larger diameter to increase pumping head but has a shorter axial length to minimize power losses. The motor assembly drives the RDS at a low speed for separating and accumulating and a higher speed for pumping.

Abstract: A device for recovering liquid droplets from a fluid flow stream including a rotatable element comprising wall elements configured to partially enclose a volume with an annular perimeter wall that includes an inside surface radially offset from and facing an axial center, a fixed base wall supports the rotatable element about the axial center, an input fluid conduit delivers the fluid flow stream into the fluid volume, means for rotating the rotatable element for generating a centrifugal force capable of forming a layer of liquid held by the centrifugal force against the inside surface, and an output liquid conduit disposed to collect liquid from the layer of liquid, wherein the layer of liquid rotates with the inside surface with a tangential velocity vector and the collection aperture is fixed in position opposed to the tangential velocity vector such that liquid in the layer of liquid enters the collection aperture.

Abstract: A cyclonic separator for separating particles and/or liquids from an airflow using means for causing the air to follow a cyclonic flow pattern through the separating chamber (12; 112; 212) and around an axis (17; 117) for causing cyclonic separation of a least a portion of the particles and/or liquids from the airflow within the separating chamber (12; 112; 212). An interior surface portion of a drum (18; 118; 218) bounding the separating chamber (12; 112; 212) and extending circumferentially around the axis (17; 117) is rotatable about the axis (17; 117) so that separation of particles and/or liquid from the airflow is improved. A vacuum cleaner including such a separator is also described.

Abstract: Ventilation Air Methane (VAM) exhaust gases from coal pre-mine gob wells, landfills and oil refinery (Installations) vent stacks are used, after adequate compression, for energizing a high-speed gas turbine. The convoluting gas discharge cause a first separation stage by stratifying of heavier non-combustible and lighter combustible gas components that exit from the turbine in opposite directions; the heavier components having a second stratifying separation in a vortex tube to separate non-combustible, heaviest pollutants from non-combustible medium heavy components. The non-combustible, medium components exit a vortex tube open end to atmosphere. The lighter combustible Methane gas effected in the first separation is piped to the Installation's engine for combustion, thereby reducing its Methane pollution and improving its fuel economy.

Abstract: The invention relates to a method for separating gas mixtures by means of an inventive gas centrifuge during which a compressible working fluid from an axial central supply tube (1) is introduced into the enlarging casing space (2) whereby passing through the flow channels (6) of the compression area (A) of a double-walled centrifuge rotor (3) and, in the axially distant area (B) inside the double tube, is guided in flow channels (6) having a constant flow cross-section (4) when in the centrifuged state. The flow of gas is separated into a specifically heavier and a specifically lighter gas fraction at a separating barrier (8) that is dependent on the individual gas volume portion. Inside the flow channels (6), the separated gas fractions are forcibly guided, slowed down and diverted in a separate manner with decreasing axial distance. The acceleration of the gas molecules in compression area (A) and the slowing down of the gas fractions in expansion area (C) ensue in a manner that is proportional to mass.

Abstract: In an apparatus for cleaning of gases a centrifugal rotor is supported by two bearings, in which it is rotatable about a rotational axis. The two bearings are lubricated by means of an oil mist, which is generated in a space, when oil is sprayed against a turbine wheel supported by the rotor. Whereas the bearing, which is situated nearest said space, is lubricated by oil mist present in the space, the second bearing is lubricated by oil mist being conducted to it through a central channel in the centrifugal rotor.

Abstract: An apparatus is configured for supplying air to a cooling package for an internal combustion engine that powers an agricultural machine. The apparatus includes an air intake housing defining an air intake opening and a sump. The sump has a wall and a port. A gating device is positioned in communication with the port. The gating device has a first position wherein the port of the sump is closed and a second position wherein the port of the sump is not closed.

Abstract: A separator for a wet vacuum cleaner has a bottom and a sidewall connected to the bottom. The sidewall has lamellas delimiting slots, wherein through the slots an air/gas flow enters an interior of the separator, delimited by the bottom and the sidewall, wherein the air/gas flow contains dirt/dust particles and/or water droplets. The lamellas each have at least one radial outer widened section, extending in a rotational direction of the separator, and at least one remaining lamella section, wherein the at least one radial outer widened section and the at least one remaining lamella section delimit together a turbulence chamber, respectively.

Abstract: Apparatus for continuously separating a stream of solid particles and a gas is provided including a housing with a tangential inlet for the stream of solid particles in a gas, a first outlet for the solid particles and a second outlet for the gas, a rotor rotatably mounted within the housing and including a plurality of carriers thereabout, the tangential inlet and the first outlet being disposed on the periphery of the housing spaced from each other in the circumferential direction, and an airtight discharge conduit associated with the first outlet, and second outlet being located centrally in the housing.

Abstract: A grill for indoor cooking includes a base which has a grilling surface on a top surface thereof and a stanchion which extends vertically from the base. The grill also includes a filter unit which has a hood having a downwardly-depending post which telescopically engages the stanchion such that the filter unit is selectively positionable in a vertical direction relative to the base. The filter unit includes a selectively removable filtering element for removing contaminants from a medium which emanates from the grilling surface into the air during grilling. A ventilation system creates an air flow for drawing the medium through the filtering element.

Abstract: An air cooled internal combustion engine has the usual intake radiator housing in front of its suction fan. A generally frustoconical body is mounted for rotation in front of the radiator. The body is made up of radially extending deflector fins extending outwardly in convergent relationship and spaced uniformly peripherally apart to provide elongate air entrance slits between them. Mechanism drives the body in rotation at a speed to deflect particles seeking to enter the slits without materially decreasing the rate of air flow created by the suction fan.

Abstract: The present invention provides a method, apparatus and system for safely and efficiently controlling a ventilation hood having at least one blower unit disposed within a hood. The blower unit operates at a first speed which is substantially below a threshold speed when a speed controller is in a first setting and a sensor does not detect a trigger condition. The blower unit also operates at or above the threshold speed when the speed controller is in a first setting and the sensor detects the trigger condition. In addition, the blower unit operates at or above the threshold speed when the speed controller is in a second setting, and deactivates when the speed controller is in a third setting.

Abstract: There is provided an integrated exclusion filter and pressurizing device which prevents leakage of unfiltered fluid across the interface area between a rotating filtering apparatus and non-rotating bulkhead. The exclusion filter utilized is of the type which utilizes Boundary Layer Momentum Transfer methodology to achieve filtration, and which includes a cylindrical stack of substantially flat annular plates. A pressurizing device is utilized downstream from the exclusion filter to repressurize filtered fluid and direct the filtered fluid toward the interface area. Either all the filtered fluid or only a portion may be repressurized, and some of the filtered fluid may be directed toward the bulkhead itself to aid pressurization by creating a local stagnation region. The pressurizing device may utilize flow diverting vanes in a housing, including blowers, pumps, compressors, and fans.

Abstract: A centrifuge including a non-rotatable containment vessel, a rotatable centrifuge tube within said vessel, an inlet assembly for dirty gas, an outlet assembly for clean gas, and an outlet assembly for dirty gas, said inlet assembly for the dirty gas and said outlet assembly for the dirty gas being located in close mutual proximity and at or towards one end of the centrifuge tube, the outlet for the clean gas being located at the opposite end of the centrufuge tube, the flow of gas entering the centrifuge tube being reversed within the centrifuge tube so as to increase the residence time of the dirty gas within said centrifuge tube. The centrifuge tube is supported on spaced foil bearings located at predetermined spacings relative to each other and to the ends and center of the centfrifuge tube.