Abstract: In various implementations, various feed gas streams which include hydrogen and carbon monoxide may be processed for conversion to product streams. For example, the feed gas stream may be processed using the Fischer-Tropsch process or a methanol synthesis process. Unconverted hydrogen and carbon monoxide can be recycled at high recovery and/or inert components removed to prevent build-up in the recycle system by using an arrangement of pressure swing adsorption systems designed to recover impure product gas streams.

Abstract: Desiccant bag and filter assembly adapted for insertion into an integrated condenser dryer chamber of a vehicle or mobile air conditioning system or the like. A support member (4) lies along the exterior of a desiccant containing pouch (2) with the pouch secured at both of its longitudinal ends to the support. A filter member is integral with the assembly and positioned at one end of the pouch. Rigid stand off members (10, 18) are positioned at respective ends of the assembly.

Abstract: A gas and liquid separation device for use with a fuel tank. The separation device includes a body having at least one passage therethrough in fluid communication with the fuel tank, and a gas and liquid separator carried by the body in fluid communication with the at least one passage and being oriented at an angle with respect to horizontal when in use.

Abstract: The vehicle canister comprising: the first chamber filled with the active carbon and funneled with the tank port, where the evaporating gas is infused through and the second chamber filled with the active carbon and funneled with the atmosphere port and neighboring the first chamber via the isolation wall. Also, it involves the vehicle canister installed in the canister housing which has the absorption and desorption improver to improve the absorption and desorption efficiency with heat conduction with temperature change of the active carbon occurred during the absorption and desorption of evaporation gas infused into the canister housing. The absorption and desorption improver is composed with the first and the second absorption and desorption improver.

Abstract: The present disclosure provides a method for separating and purifying a landfill gas stream. In one embodiment, the method includes a step of collecting a crude landfill gas stream which includes at least methane, carbon dioxide, oxygen, and nitrogen gases. The method also includes a step of separating the crude landfill gas stream into at least an intermediate landfill gas stream and a first waste gas stream using a membrane separation unit, wherein the intermediate landfill gas stream is enriched in methane and depleted in carbon dioxide relative to the crude landfill gas stream. The method further includes a step of separating the intermediate landfill gas stream into at least a final landfill gas stream and a second waste gas stream using a pressure swing adsorption separation unit, wherein the final landfill gas stream is enriched in methane and depleted in carbon dioxide, oxygen, and nitrogen relative to the intermediate landfill gas stream. In some embodiments.

Abstract: The invention relates to an adsorbing material (1) with a protective function against chemical toxins, especially chemical warfare agents, the adsorbing material (1) comprising a multilayered layer construction (2), the layer construction (2) comprising at least one in particular sheetlike carrier layer (3) and, associated to the carrier layer (3), a barrier layer (4) which prevents or at least retards the passage of chemical poisons, the barrier layer (4) comprising on the one hand at least one adsorbing layer (5) based on an adsorbent for chemical poisons and especially on activated carbon, and, on the other hand, at least one at least essentially water and air impervious but water vapor pervious membrane (6) which retards the passage of chemical poisons or is at least essentially impervious to chemical poisons. The adsorbing material (1) has a high wear comfort, in particular good breathability, while at the same time having excellent protection against chemical poisons.

Abstract: The present invention relates to systems and methods for controlling humidity and temperature in gases or air streams used in semiconductor processing systems. These systems and methods can be used in combination with systems and methods for contaminant detection and removal.

Abstract: A filter assembly for removing particulate contaminants and chemical contaminants from an incoming dirty air stream for a fuel cell. The filter assembly also includes a noise suppression element that reduces sound waves or noise emanating from any equipment, such as a compressor. The filter assembly can include a particulate filter portion for removing physical or particulate contaminants, a chemical filter portion for removing chemical contaminants, or can have both portions.

Abstract: A quick-change filter system including at least one base, and at least one quick-change filter having an inlet, an outlet, and a filter housing. The base includes a filter coupling part having a gas inlet stub for connection to the inlet, and a gas outlet stub for connection to the outlet. The filter housing is at least partly filled with filter material, and is connected to the inlet and the outlet. The quick-change filter further includes quick-change coupling containing the inlet and the outlet of the quick-change filter and arranged for cooperation with the filter coupling part. The base is configured for manual connection to the quick-change filter, and for automatic, gastight sealing of the gas outlet stub and the gas inlet stub when decoupling the quick-change filter from the base.

Abstract: An apparatus and process for abating at least one acid or hydride gas component or by-product thereof, from an effluent stream deriving from a semiconductor manufacturing process, comprising, a first sorbent bed material having a high capacity sorbent affinity for the acid or hydride gas component, a second and discreet sorbent bed material having a high capture rate sorbent affinity for the same gas component, and a flow path joining the process in gas flow communication with the sorbent bed materials such that effluent is flowed through the sorbent beds, to reduce the acid or hydride gas component. The first sorbent bed material preferably comprises basic copper carbonate and the second sorbent bed preferably comprises at least one of, CuO, AgO, CoO, CO3O4, ZnO, MnO2 and mixtures thereof.

Abstract: A combined building air-conditioning unit and NBC protection system, containing an enclosed space housing a building air-conditioning unit and further including a plurality of chambers, a first chamber having an ambient air inlet port, one prefilter and a blower for sucking air through the prefilter, a second chamber having a valve including an open and closed state, receiving air from the blower and accommodating a C-detector and a valve actuator responsible, at least indirectly to, and operable by, the C-detector, and a third chamber housing at least one C-filter and a blower for sucking air from the second chamber via the C-filter into the building when the valve is in its closed state. A method for economically controlling air purity within a protected space is also provided.

Abstract: The air-cleaner includes a housing. The air-cleaner includes a filter element located in the housing to filter an air taken into the housing. The air-cleaner includes an adsorption element for adsorbing a vaporized fuel flowing into the housing. The housing includes first and second housing components having open ends put on each other. The filter element is held between the first and second housing components, separating the housing into a clean side and a dust side. The adsorption element includes a frame at the periphery; and an adsorption portion located inside of the frame. One housing component of the first and second housing components as the clean side has an inner side back in the open end, the inner side having a mounting portion having the adsorption element mounted thereto. The mounting portion includes the adsorption element; and a support member put on the adsorption element and supporting the adsorption portion. The support member is located back in said one housing component for fixing.

Abstract: An operating room filter system connectable to a surgical body gas evacuator, such as a trocar, that includes a carbon monoxide filter media that removes carbon monoxide from a surgical waste gas. In addition, the inclusion of further filter media upstream of the carbon monoxide filter media inhibits the saturation of the carbon monoxide filter media to thereby provide an extended life to the filtration system.

Abstract: A device comprising at least one absorber, at least one cold separator from which is extracted a gaseous phase that feeds the absorber, at least one recycling to said cold separator of at least a portion of liquid effluent that is obtained from the absorber and which is mixed with the feedstock, at least one heat exchanger for cooling the mixture prior to the recycling, at least one conduit for recovering a light hydrocarbon-enriched liquid fraction obtained from the cold separator and at least one conduit for evacuating gases from the absorber, said device being useable for the treatment of a hydrogen-rich gas or for the recovery of a hydrocarbon-enriched liquid.

Abstract: An air dryer comprises a base member, a main cartridge and an intermediate cartridge. The air dryer is capable of drying and possibly filtering and/or cleaning air passing there through. The intermediate cartridge, capable of drying and possibly filtering and/or cleaning air passing there through, is arranged between the base member and the main cartridge.

Abstract: A canister is connected to a fuel tank to adsorb fuel vapor vaporized in the fuel tank and includes a canister housing and a canister main body, which is received in the canister housing and communicates with the fuel tank at one end. The canister housing includes an atmospheric port and a filter chamber, and the filter chamber receives a filter and communicates between the other end of the canister main body and the atmospheric port, which in turn communicates with the atmosphere. The filter includes an active carbon part, an atmosphere-side unwoven fabric and a tank-side unwoven fabric. The active carbon part includes active carbon granules, which adsorb fuel vapor vaporized in the fuel tank. The atmosphere-side unwoven fabric and the tank-side unwoven fabric sandwich the active carbon part therebetween in a flow direction of air, which passes through the active carbon part.

Abstract: A serviceable filtering oil removal cartridge for use in a compressed air assembly of a vehicle air brake system includes a housing having a first end and a second end. A filtering element is disposed within the housing for agglomerating and removing oil from compressed air entering the oil removal cartridge. A load plate is disposed within the housing for supporting the filtering element. The load plate includes a connecting portion dimensioned to allow the oil removal cartridge to be removed and installed as a single unit. The connecting portion is preferably a threaded annulus. A thermal vent can be included, wherein pressure is released from the oil removal cartridge upon reaching a threshold temperature.

Abstract: A filter cleaner for wet/dry vacuum is provided for effectively cleaning filter cartridges employed for use in a class of vacuum cleaners commonly referred to as “wet/dry vacs.” The filter cleaner apparatus includes a cylindrical catch tank supported by a base. The catch tank supports an attachable circular lid. A motor cover, which is disposed atop the circular lid, is mounted with a handle. Housed within catch tank is an electric motor which spinably drives an upper filter plate via a rotatable shaft. A lower filter plate assembly housed within catch tank includes a rotatable lower filter plate being spring-biased in an upward manner. The lower filter plate assembly further includes a debris directional funnel which directs debris to a removable collection tray.

Abstract: Disclosed herein is a system for simultaneously removing dust and volatile toxic organic compounds. The system comprises a dust collecting unit disposed between an inlet duct and an outlet duct for removing dust, an organic compound removing unit disposed between the inlet duct and the outlet duct for removing volatile toxic organic compounds, and an inlet blower disposed between the dust collecting unit and the organic compound removing unit. The dust collecting unit is made up of a bag filter, which comprises a housing formed in the shape of a box and connected to the inlet duct, a plurality of filtering members, such as cloth or felt, arranged in the housing, and dust collecting layers defined between the housing and the filtering members. The organic compound removing unit comprises an absorbing apparatus for absorbing the volatile toxic organic compounds, and regenerating heaters attached on the outer circumference of the absorbing apparatus.

Abstract: A device for enriching air with oxygen by pressure swing adsorption in a molecular sieve bed provides for the separation of water from the air to be enriched with oxygen. The water separator is arranged directly upstream of the molecular sieve bed (8). The water separator is designed as a cyclone type water separator (5).

Abstract: An adsorber for cleaning raw gas has at least one filter element wherein the at least one filter element is made of electrically conducting adsorber material. A filter module has a module housing in which such an adsorber is arranged. The housing has at least one inlet opening for the raw gas entering the filter module and at least one outlet opening for the clean gas exiting the filter module. A first ventilation damper unit closes the inlet opening as needed and a second ventilation damper unit closes the outlet opening as needed for performing regeneration and adsorption phases.

Abstract: A process for concentrating and recovering methane and carbon dioxide from landfill gas includes absorption of commonly occurring pollutants using a carbon dioxide absorbent which itself may be in situ recoverable constituent. Separated methane is concentrated into a high heating value fuel, and a carbon dioxide product may also be recovered. Process streams may be used to provide fuel for compression and refrigeration and to regenerate carbon dioxide absorbent.

Abstract: The blue smoke control collector system is used for the collection of the blue haze which is actually comprised of tiny oil droplets that hover over hot asphaltic concrete mix. The system is designed to collect and filter the air generated at hot mix asphalt transfer points, asphaltic concrete silo loading areas and truck loading areas and to remove the oil therefrom. Oil captured in the system settles into a plenum and is then drained therefrom for suitable disposal. The filtered air can be released in to the atmosphere. An optional activated charcoal filter stage can be included to reduce odor in the released air.

Abstract: A quick-change filter system provided with at least one base and at least one quick-change filter, which base is provided with a filter coupling provided with a gas inlet stub for connection to an inlet of the filter and with a gas outlet stub for connection to an outlet of the filter, the filter being provided with a housing, which is at least partly filled with filter material and to which the inlet and the outlet are connected, and with a quick-change coupling arranged for cooperation with the filter coupling of the base, the coupling containing the inlet and the outlet of the filter, the base being provided with a mechanism for manually connecting the filter to the base, and being provided with a sealing mechanism for automatic, gastight sealing of the gas outlet stub and the gas inlet stub when decoupling the filter from the base.

Abstract: The subject of the present invention is a method and a device for the separation of fuel-vapor/air mixtures into their components, in particular for purification of vapor mixtures, such as occur in fuel tanks of motor vehicles. A preseparator is arranged between the fuel tank and the filter. In the preseparator, the hydrocarbons are separated from the mixture and are supplied to the fuel tank again. The remaining mixture is supplied to the filter.

Abstract: This invention provides systems and methods of supplying oxygen-enriched air to an enclosed space or compartment. The systems and methods may distill oxygen from ambient air by a molecular sieve pressure cycle mechanism, such as a pressure swing absorption, may generate oxygen from water using electricity or may use oxygen enriched air produced by membrane filtration. The invention helps people improve their wellness, productivity and comfort, improve performance of mental and/or physical tasks, increase their alertness, quality of life and pleasure, reduce their drowsiness, and aid in curing and preventing disease by increasing the percentage of oxygen in the enclosed space to a beneficial and safe level.

Abstract: An air dryer and reservoir assembly for providing compressed air from an air compressor (20) on a heavy motor vehicle which includes an air dryer (14) connected to receive compressed air from the air compressor (20) and a secondary reservoir (12), including an integral purge volume (34), for storing compressed air which passes through the air dryer (14), with the air dryer (14) and the secondary reservoir (12) being securely attached to a housing (16) to form an air dryer reservoir module (10). A primary, reservoir (18) for storing compressed air from the air dryer (14) is located remote from the air dryer reservoir module (10). A pressure equalizing mechanism (57) is disposed between the primary reservoir (18) and the secondary reservoir (12) for keeping pressure in the two reservoirs (12,18) equal.

Abstract: An apparatus and process for abating at least one acid or hydride gas component or by-product thereof, from an effluent stream deriving from a semiconductor manufacturing process, comprising, a first sorbent bed material having a high capacity sorbent affinity for the acid or hydride gas component, a second and discreet sorbent bed material having a high capture rate sorbent affinity for the same gas component, and a flow path joining the process in gas flow communication with the sorbent bed materials such that effluent is flowed through the sorbent beds, to reduce the acid or hydride gas component. The first sorbent bed material preferably comprises basic copper carbonate and the second sorbent bed preferably comprises at least one of, CuO, AgO, CoO, Co3O4, ZnO, MnO2 and mixtures thereof.

Abstract: A filter assembly for removing particulate contaminants and chemical contaminants from an incoming dirty air stream for a fuel cell. The filter assembly also includes a noise suppression element that reduces sound waves or noise emanating from any equipment, such as a compressor. The filter assembly can include a particulate filter portion for removing physical or particulate contaminants, a chemical filter portion for removing chemical contaminants, or can have both portions.

Abstract: A concentrating chamber in an oxygen concentrating apparatus is provided, in which a process for adsorbing nitrogen to concentrate oxygen is performed in a single case. The concentrating chamber in an oxygen concentrating apparatus includes: a casing having upper and lower openings; an adsorption unit for performing an oxygen concentration through a compressed air and counter-flowing the stored oxygen to perform a nitrogen rinsing in the casing; a check valve operating according to a predetermined pressure, for supplying the oxygen concentrated in the adsorption unit and rinsing the nitrogen adsorbed in the adsorption unit; and upper and lower manifolds for supplying the concentrated oxygen through the upper and lower ends of the casing, or supplying the compressed air and simultaneously exhausting the rinsed nitrogen, through the upper and lower ends of the casing. The concentrating chamber in an oxygen concentrating apparatus includes at least two casings.

Abstract: A method and an apparatus for controlling airflow in a desiccant drying system having two desiccant beds (10, 12). A first diverter valve (14) communicates with each of the desiccant beds, a regeneration air inlet (22), and a press air outlet (20). A second diverter valve (16) communicates with each of the desiccant beds, a process air inlet (18), and a regeneration air outlet (28). First and second regeneration air control valves (24, 30) are also provided which during a cooling phase of the regeneration cycle admit a cooling bleed stream of process air to the desiccant bed being regenerated and then convey the cooling air bleed stream from the desiccant bed and through a heat exchanger (42) back to the process air inlet.

Abstract: An air demoisturizer for an oil expansion vessel of an electrical power unit like an oil-filled transformer, tap changer or choke, has a heating element in the body of absorbent and utilizes a heat-regeneratable absorbent which is cut off by a moisture detector from the oil expansion vessel when the absorbent is saturated and is thermally regenerated. The demoisturizing column is provided in line with an oil receiver through which the dry air is passed before reaching the oil expansion vessel.

Abstract: An air dryer and reservoir assembly for providing compressed air from an air compressor (20) on a heavy motor vehicle which includes an air dryer (14) connected to receive compressed air from the air compressor (20) and a secondary reservoir (12), including an integral purge volume (34), for storing compressed air which passes through the air dryer (14), with the air dryer (14) and the secondary reservoir (12) being securely attached to a housing (16) to form an air dryer reservoir module (10). A primary reservoir (18) for storing compressed air from the air dryer (14) is located remote from the air dryer reservoir module (10). A pressure equalizing mechanism (57) is disposed between the primary reservoir (18) and the secondary reservoir (12) for keeping pressure in the two reservoirs (12,18) equal.

Abstract: A material disposal system ideally suited for use in container filling operations and includes a cover member and a hopper having a lower door operable relative to the hopper by pneumatic or other actuating means for opening and closing the passage disposed above a drum or other container to be filled. The cover member and hopper are fixedly attached to each other. The cover member forms a seal around the inside of the container opening such that air and other gases escaping from the container by the filling or other material handling operation are directed through filter means which separate airborne particulates therefrom. The material disposal system is adaptable for covering and sealing a wide variety of containers. The filter means is adaptable for filtering a wide variety of materials and particulate sizes for removal of noxious gases, vapors and other airborne effluents.

Abstract: A facility for improving the environmental atmosphere of an interior space, which includes a negative ion discharger; a plurality of electric poles connected to the output wires of the negative ion discharger. The aforementioned negative ion discharger is placed in a corner of the interior space, and the plurality of electric poles are situated in the upper part of the interior space. By means of an active carbon layer beneath the floor indoors, an invisible shelter will be formed by the negative ions released from the negative ion discharger. Accordingly, the ion energy will be effectively decreased, and the particle condition of the indoor space will be harmonized.

Abstract: Water vapor is removed from a mixture of air, metabolic carbon dioxide (CO2), and water vapor prior to removing the CO2 from the mixture. The water vapor-containing mixture is passed through a membrane module which is operative to separate the water vapor from the air and CO2 mixture. The water vapor in the entering mixture will pass in one direction through the membrane in the module from an entry side of the membrane to an exit side of the membrane. The membrane divides the module into two chambers, one of which receives the water vapor-containing mixture, and the other of which receives CO2-free air from a CO2 adsorbant station. The water vapor-containing mixture is removed from a closed habitable environment such as a space station, a space suit, a submarine, or the like, and is moved through the membrane module where the water vapor is removed from the gas stream.

Abstract: There is provided a method and an apparatus for collecting a rare gas, which are capable of effectively collecting the rare gas contained in an exhaust gas exhausted from a rare gas using apparatus such as a plasma apparatus or the like, and moreover capable of securely supplying the rare gas having a predetermined purity to the rare gas using apparatus, and the method for collecting rare gas which comprises collecting a rare gas contained in an exhaust gas exhausted from a rare gas using apparatus operated under decompression, the method comprises the step of collecting the rare gas by separating the rare gas and impurities contained in the exhaust gas via at least two gas separating steps.

Abstract: Disclosed is an air purification device with oxygen-supplying function, in which air in an automobile is sucked by a vacuum pump and purified by a dust collector or an adsorbent such as activated carbon and zeolite, and oxygen is enriched in air to supply oxygen enriched air into the automobile. The air purification device enriches oxygen in air according to a VSA (vacuum swing adsorption) process using a difference between pressure in the adsorption bed and atmospheric pressure, in which nitrogen adsorbed into the adsorbent is released using the vacuum pump. The air purification device comprises an air filter for removing impurities from air sucked from an inside of the automobile by the vacuum pump, an adsorbent for adsorbing nitrogen from air passing through the air filter and passing oxygen, an oxygen tank for storing oxygen supplied from the adsorbent and releasing oxygen using a vacuum, and if necessary, an anion generator or a scent generator.

Abstract: A gas adsorbent system includes a molded gas adsorbent within a housing. The molded gas adsorbent is disposed in the housing so that shifting is prevented without adhering the gas adsorbent to the housing, for example, by completely filling the housing. The gas adsorbent may include activated zeolite 13X. The gas adsorbent may be formed from a polymer solution such as polysulfone, and contain an organic binder.

Abstract: An air dryer and reservoir assembly for providing compressed air from an air compressor (20) on a heavy motor vehicle which includes an air dryer (14) connected to receive compressed air from the air compressor (20) and a secondary reservoir (12), including an integral purge volume (34), for storing compressed air which passes through the air dryer (14), with the air dryer (14) and the secondary reservoir (12) being securely attached to a housing (16) to form an air dryer reservoir module (10). A primary reservoir (18) for storing compressed air from the air dryer (14) is located remote from the air dryer reservoir module (10). A pressure equalizing mechanism (57) is disposed between the primary reservoir (18) and the secondary reservoir (12) for keeping pressure in the two reservoirs (12,18) equal.

Abstract: A serviceable filtering oil removal cartridge for use in a compressed air assembly of a vehicle air brake system includes a housing having a first end and a second end. A filtering element is disposed within the housing for agglomerating and removing oil from compressed air entering the oil removal cartridge. A load plate is disposed within the housing for supporting the filtering element. The load plate includes a connecting portion dimensioned to allow the oil removal cartridge to be removed and installed as a single unit. The connecting portion is preferably a threaded annulus. A thermal vent can be included, wherein pressure is released from the oil removal cartridge upon reaching a threshold temperature.

Abstract: A flow system includes an air mover operable to cause the flow. A first stage, such as a coarse filter, is disposed upstream of the air mover and operates on the flow. A second stage, such as an adsorbent cell or muffler, is disposed downstream of the air mover and further operates on the flow. Other stages, such as a fine filter, may be disposed between the first and second stages.

Abstract: A gas separation apparatus and process has a first pressure swing adsorption (PSA) unit (110) receiving feed gas (112), which comprises a first and a second component. First PSA unit (110) produces first product gas (114) pre-dominantly containing the first component, and first off gas (116) containing at least some of the first component and second component. Compressor (120) is coupled to first PSA unit (110) to compress first off gas (116) to form compressed off gas (126), which is passed downstream to absorber unit (130), which employs a solvent to remove at least part of the second component from compressed off gas (126), forming an enriched compressed off gas (136B). Second PSA unit (140) receives enriched compressed off gas (136B) and produces second product gas (142) which predominantly contains the first component and a second off gas that is sent to waste or reformer burner (150).

Abstract: An adsorption bed arrangement includes a plurality of adsorption elements, a housing, and a gasket member. Each of the adsorption elements has a first adsorptive media and a second adsorptive media contained within a respective element. The first and second adsorptive medias remove different contaminants from the incoming air stream. For example, the first adsorptive media removes acidic contaminants and the second adsorptive media removes basic contaminants. Each of the adsorption elements is selectively openable to provide access to the adsorptive medias. The housing defines an interior, a plurality of inlet openings, and a plurality of outlet openings. The adsorption elements are positioned within the housing interior and the housing is selectively openable to provide access to the adsorption elements. The gasket member is between the housing and the adsorption elements.

Abstract: A serviceable filtering oil removal cartridge for use in a compressed air assembly of a vehicle air brake system includes a housing having a first end and a second end. A filtering element is disposed within the housing for agglomerating and removing oil from compressed air entering the oil removal cartridge. A load plate is disposed within the housing for supporting the filtering element. The load plate includes a connecting portion dimensioned to allow the oil removal cartridge to be removed and installed as a single unit. The connecting portion is preferably a threaded annulus.

Abstract: A gas adsorbent is made by dissolving a polymer in one or more first solvents to form a polymer solution; mixing an inorganic adsorbent with the polymer solution to form a precursor; molding the precursor; and leaching the first solvents from the precursor with a second solvent.

Abstract: A filter apparatus is connected to an outlet portion of a canister mounted on a fuel supply system for a vehicle. A housing and a filter element are provided. The housing has a connection-opening portion connected to the outlet portion and atmospheric release opening portion communicating with the atmosphere. The filter element includes a frame which surrounds a filter body and is joined over its entire periphery to an inner wall of the housing, dividing an interior of the housing into a clean-side and dirty-side zone. The frame includes only one one-way valve, which allows fluid flow only from the clean-side zone to the dirty-side zone, bypassing the filter element. The filter apparatus is arranged so that fluid entering the housing by the connection-opening portion may pass through the filter element and exit by the atmospheric release opening portion.

Abstract: A method for delivering at least two working gases from a common air supply comprising the steps of depleting the air in O2 in order to obtain a first gas mixture having an O2 content less than or equal to t1; delivering at least a portion of this first gas mixture as a first working gas; depleting another portion of this first gas mixture in O2 in order to obtain the second gas mixture having an O2 content less than or equal to t2, wherein t1 is greater than t2; and delivering the second gas mixture as a second working gas.

Abstract: A system for discharging gas emitted from an apparatus or facility having a vacuum pump which sucks the gas emitted from the apparatus or facility while being supplied with a gas other than the sucked gas, the system comprising a unit for recovering at least part of the gas discharged from the vacuum pump, and recirculating the recovered gas to the vacuum pump as the gas other than the sucked gas. Part of the recovered gas may be recirculated to the apparatus or facility emitting the gas. The system reduces or eliminates emission to the atmosphere of global warming gases such as perfluorocompounds discharged from the vacuum pump, and also reduces the energy required for operating the vacuum pump. A method for discharging gas emitted from an apparatus or facility using a vacuum pump, wherein emission of global warming gases to the atmosphere is reduced or eliminated, is also disclosed.

Abstract: An air dryer and reservoir assembly for providing compressed air from an air compressor (20) on a heavy motor vehicle which includes an air dryer (14) connected to receive compressed air from the air compressor (20) and a secondary reservoir (12), including an integral purge volume (34), for storing compressed air which passes through the air dryer (14), with the air dryer (14) and the secondary reservoir (12) being securely attached to a housing (16) to form an air dryer reservoir module (10). A primary reservoir (18) for storing compressed air from the air dryer (14) is located remote from the air dryer reservoir module (10). A pressure equalizing mechanism (57) is disposed between the primary reservoir (18) and the secondary reservoir (12) for keeping pressure in the two reservoirs (12,18) equal.