Abstract: A method and apparatus for preventing contamination of a substrate or a substrate surface, and particularly relates to prevention of contamination of raw materials, semi-finished products, base materials of products and substrate surface in a high-tech industry such as an in the production of semiconductors and liquid crystals. A gas coming into contact with a base material or substrate is purified by dust removing apparatus and adsorption and/or absorption apparatus so that the concentration of fine particles in the gas is below class 1,000 and a non-methane hydrocarbon concentration is below 0.2 ppm. Thereafter, the base material or the substrate surface is exposed to this gas.

Abstract: A method that allows an individual to personally test for contaminants in an air supply. The method consists of purchasing the test kit, mounting the test kit to an existing particulate filter, placing the mounted test kit and particulate filter into the filter housing and blowing air through the test kit. The test kit is then removed from the furnace, repackaged and sent to a laboratory for analysis. The air quality test kit comprises a test filter, a filter backing pad, a support and a pair of end caps. The test filter, the filter backing pad and the support form a device to capture and retain particles carried in an airflow.

Abstract: A removable dirt separation system for a vacuum cleaner is disclosed. The dirt separation system includes a dirt cup having a number of outer walls having a first portion defined by a filter assembly and a second portion with a first translucent panel to allow viewing material which accumulates within the dirt cup. The dirt cup further includes a top opening allow emptying of the dirt cup and an inlet in fluid communication with a suction nozzle of the vacuum cleaner. The dirt separation system further includes a lid for sealing the upper opening of the dirt cup. The dirt separation system yet further include a dirt duct for routing air which exits the filter assembly to an exit opening of the dirt separation system. A method of operating a removable dirt separation system for a vacuum cleaner is also disclosed.

Abstract: A washable air filter for an internal combustion engine which has high durability and can be washed with ease to reuse it is disclosed. The washable air filter includes an outer cylindrical member 10; an inner cylindrical member 11; a first filter element 30 formed from a stainless mesh sheet which is folded in a pleated-form having peaks and valleys arranged alternately and provided between the outer cylindrical member 10 and the inner cylindrical member 11; and a second filter element 33 provided between the outer cylindrical member 10 and the first tilter element 30. Since the washable air filter uses the filter element made from the stainless mesh sheet, it is possible to effectively remove dust particles from air. Further, the washable air filter can be reused because dust particles are removed off the filter element by washing after use.

Abstract: An arrangement for separating a hydrophobic liquid phase from a gaseous stream includes a coalescer filter, a housing, a gas flow direction arrangement, and a liquid collection arrangement. The coalescer filter includes a non-woven media of fibers. The housing includes an interior having a gas flow inlet and a gas flow outlet. The liquid collection arrangement is positioned within the housing construction and is oriented for receiving liquid collected from the coalescer filter and drained therefrom.

Abstract: A method and a device for filtering polluted air, in which the air is successively subjected to the processes of extracting grease/fat and water, drying air still containing residual humidity, and adsorbing smells/odors. The filter device includes, in a direction of flow a vortex filter, layers of expanded metal, a filter for drying the air, and an odor filter, all in a filter housing. The filter for drying the air and the odor filter are, preferably, combined in a filter cassette that is disposed on the filter housing such that it can be changed/replaced.

Abstract: A method and apparatus for filtering particulate and condensation are provided. The filter is a multi-state filter that reduces contamination from sources other than the desired source by having its filtering components encased and compacted together.

Abstract: The present invention is to provide a filter medium for a turbine in which contamination is less likely to be caused in the turbine, and an increase in pressure loss is suppressed. One form of this filter medium includes a porous polytetrafluoroethylene (PTFE) membrane and an air-permeable supporting member. The air-permeable supporting member has a fiber diameter of not more than 15 &mgr;m. This filter medium is used by disposing the air-permeable supporting member on an upstream side of the porous PTFE membrane with respect to air flow passing through the filter medium toward the turbine. Another form of the filter medium of the present invention includes a porous PTFE membrane, a first air-permeable supporting member, and a second air-permeable supporting member.

Abstract: A manifold assembly including a unitary manifold body including at least two component ports and an integral channel system connecting the component ports in series, and at least two fluid-treating components directly connected to the component ports in a substantially gas-tight manner. The fluid-treating components can include at least one of a coalescer, an adsorber, an absorber, a strainer, and a filter. At least one of the component ports includes an inner port section and an outer port section, the outer port section including a flow distributor arranged around and concentric to the inner port section.

Abstract: A method for cleaning a filter having Z-media includes providing a filter having Z-media and cleaning the media construction by directing a pulse of compressed gas into the media construction through the downstream flow face. Filter elements useable with such methods include elements made of Z-media. An example system utilizing the method includes a gas turbine air intake system.

Abstract: A particulate filter for an exhaust system having an exhaust flow and a nominal flow area includes a housing and a plurality of plates arranged parallel to each other within the housing. Each plate has a plurality of orifices and a plurality of micropockets configured to trap exhaust particulates.

Abstract: An air purifier discharges air directly to a room without forcing the air to pass through a HEPA filter when the level of contaminations in the air, such as dust particles, is determined to be sufficiently low. The air purifier thus minimizes air pressure loss and attenuates operational noise caused by the HEPA filter, through which air passes. In an aspect, the air purifier includes a main body defining an air passage therein to allow sucked air to pass therethrough prior to being discharged, and a first filter installed in the main body to be switched between a dosed state and an open state. The first filter removes contaminants from the sucked air in the dosed state, and allows the sucked air to pass smoothly through the air passage in the open state.

Abstract: An inline air filter for fuel injected engines that provides for the installation of the air filter into the air intake line of an air intake system of a fuel injected engine. The inline air includes a foam filter, a foam filter mesh, and a mesh filter. The foam filter is made from a flexible reticulated polyurethane foam material that allows proper air flow while maintaining good filtering capability. The inline air filter is installed onto an air intake assembly of the fuel injected engine by splicing the inline air filter into an air intake tube.

Abstract: A method and apparatus for preventing contamination of a substrate or a substrate surface, and particularly relates to prevention of contamination of raw materials, semi-finished products, base materials of products and substrate surface in a high-tech industry such as in the production of semiconductors and liquid crystals. A gas coming into contact with a base material or substrate is purified by dust removing apparatus and adsorption and/or absorption apparatus so that the concentration of fine particles in the gas is below class 1,000 and a non-methane hydrocarbon concentration is below 0.2 ppm. Thereafter, the base material or the substrate surface is exposed to this gas.

Abstract: Air in a compressed air system is cleaned by consecutively passing the air through a pre-filter, silica gel with large pores, silica gel with fine pores, a molecular sieve, and a fine filter.

Abstract: Filter media and filter structure or media pack can be engineered to exhibit high initial efficiency and to surface load particulate removed from a gaseous stream. The filter technology protects engine operation from ingested particulate and accumulates the particulate as a surface loaded layer visible on the surface of the structure. The particulate accumulates as a surface loaded layer until it achieves a certain depth of particulate or gray scale characteristic or color depth indicative of the end of the useful life of the filter prompting a change of the filter structure. The filter structure is characterized by its ability to surface load particulate, avoid accumulation of particulate in the depth media and enhance the characteristics of the material through surface loading. Such technology is particularly useful in light duty vehicle maintenance technology.

Abstract: A dust filter bag having a highly porous backing material ply and a method for producing the dust filter bag. The dust filter bag includes at least one filter material ply and at least one backing material ply, the backing material ply possessing an air permeability of at least 900 l/m2 x s, a burst strength of at least 70 kPa, a rupture strength longitudinally better than 10 and transversely better than 3 N, a flexural rigidity longitudinally better than 0.5 cN cm2 and transversely better than 0.25 cN cm2, a basis weight of 30-80 g/m2 and a droplet sink-in time of less than 10 minimum. The dust filter bag can be produced by the following steps: mixing fibers including cellulose fibers and fusible fibers into a homogenous fiber mix, processing the fiber mix into a fiber web by wet laying, drying the fiber web, curing the dried fiber web by thermofusion into a backing material ply, processing the backing material ply with a filter material ply into a raw bag, and finishing the raw bag into a dust filter bag.

Abstract: A multi port air filter for fuel injected engines provides for the installation of the air filter into the air intake line of an air intake system of a fuel injected engine. The multi port air filter has several filtering elements including an outside filter screen, a foam filter, and inside filter screen, a foam filter mesh, and a mesh filter. The foam filter is made from a flexible reticulated polyurethane foam material that allows proper air flow while maintaining good filtering capability.

Abstract: A method that allows an individual to personally test for contaminants in an air supply. The method consists of purchasing the test kit, mounting the test kit to an existing particulate filter, placing the mounted test kit and particulate filter into the filter housing and blowing air through the test kit. The test kit is then removed from the furnace, repackaged and sent to a laboratory for analysis. The air quality test kit comprises a test filter, a filter backing pad, a support and a pair of end caps. The test filter, the filter backing pad and the support form a device to capture and retain particles carried in an airflow.

Abstract: A liquid reservoir tank assembly includes a gas-liquid separator, such as an air-oil separator. A tank body has an open end, a portion of the tank body forming a liquid separation chamber, another portion of the tank body forming a liquid reservoir. A tank cover covers the open end of the tank body, the tank body and the tank cover providing a gas inlet and a gas outlet with a gas flow through the separation chamber from the gas inlet to the gas outlet. The gas-liquid separator is mounted in the separation chamber in the gas flow between the gas inlet and the gas outlet. The separator has a coalescing stage layer and a drain stage layer arranged radially symmetrically about an axis extending through the interior of the separator, the coalescing stage layer being upstream of the drain stage layer. Each of the layers is generally frustoconical in shape.

Abstract: Disclosed is a two or three phase separator including a centrifugal separator, a demister (if a three phase separator), and a filter contained within a housing. The filter uses an outside-in flow principle. The filter includes an inner layer or a center core that defines a hollow interior. An outer layer is positioned adjacent and surrounding the inner layer. The outer layer includes a re-enforcement layer, a first particle filter layer, a coalescer layer, and a second particle filter layer. An access cover of the separator includes a cover plug, an actuator cam, a plurality of idler cam plates, and a plurality of mechanisms. The access cover cooperates with an opening and an annular groove in the housing to close off and seal the separator.

Abstract: A filter device for removing combustion gases and/or particulate matter from air comprises a cooling unit and filtering unit. The cooling unit has an inlet for receiving an air stream containing combustion gases and/or particulate matter, a cooling member for lowering the temperature of the air stream, a first outlet for discharge of a condensate, and a second outlet for discharge of the air stream containing uncondensed particulate matter. The filtering unit has an inlet for receiving the air stream containing uncondensed particulate matter from the second outlet of the cooling unit, the filtering unit having at least one filter barrier through which the air stream passes, the filter barrier being configured to catch at least a portion of the particulate matter in the air stream. The invention is also for a process for removing combustion gases and/or particulate matter from an air stream.

Abstract: The present invention provides an air filter made from a composite comprising a substrate and a polymeric foam. The air filter can comprise a single layer. The foam has a density gradient where the lower density upstream portion of the filter can trap larger particles, allowing smaller particles to penetrate into the filter and be trapped by the higher density downstream portion of the filter. The density gradient arises from intercalation of the polymeric foam with the substrate. The composite design provides comparable or improved filtration efficiencies compared to the complex prior art air filters which rely on multiple layers to provide a density gradient.

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 vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary blade driven by the motor to create a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing large solid particles from the air.

Abstract: A high-performance filter for an intake air for a gas turbine according to the present invention includes a low-efficiency filter media and a high-efficiency filter media superposed closely on each other in the named order from an upstream side in a direction of an air flow. Each of the filter media is formed with a filtering area of 20 to 35 m2. The filter media having a filtration efficiency of 40 to 70% for particles having a particle size of 0.3 &mgr;m is disposed as a layer upstream in the air flow direction, and the filter media having a filtration efficiency of 90 to 99.99% for particles having a particle size of 0.3 &mgr;m is disposed as a downstream layer. In addition, a filter unit according to the present invention is made using the above filter, Thus, even when the filter unit is used for atmospheric dusts including a high concentration of dusts having a particle size of 0.3 to 0.

Abstract: A filter arrangement includes a first filter element having opposite first and second ends; an axial length between the first and second ends; and a plurality of flutes. Each of the flutes has a first end portion adjacent to the first filter element first end, and a second end portion adjacent to the first filter element second end. Selected ones of the flutes are open at the first end portion and closed at the second end portion; and selected ones of the flutes are closed at the first end portion and open at the second end portion. A sleeve member secured to and circumscribing the first filter element. The sleeve member is oriented relative the first filter element to extend at least 30% of the axial length of the first filter element. A seal member pressure flange at least partially circumscribes the sleeve member. The filter arrangement is particularly useful for gas turbine systems. Methods for operating and servicing filter arrangements preferably utilize constructions herein.

Abstract: Filter arrangements include a barrier media in the form of fluted media treated with a deposit of fine fibers. The media is particularly advantageous in high temperature (greater than 140 to 240° F.) systems. Such systems may include engine systems, gas turbine systems, and fuel cell systems. Filter arrangements may take the form of media packs having a circular cross-section or a racetrack shaped cross-section, or media packs formed in a panel configuration.

Abstract: The present invention is to provide a filter medium for a turbine in which contamination is less likely to be caused in the turbine, and an increase in pressure loss is suppressed. One form of this filter medium includes a porous polytetrafluoroethylene (PTFE) membrane and an air-permeable supporting member. The air-permeable supporting member has a fiber diameter of not more than 15 &mgr;m. This filter medium is used by disposing the air-permeable supporting member on an upstream side of the porous PTFE membrane with respect to air flow passing through the filter medium toward the turbine. Another form of the filter medium of the present invention includes a porous PTFE membrane, a first air-permeable supporting member, and a second air-permeable supporting member.

Abstract: A filter assembly comprises a housing (44) with an inlet (45) and an outlet (43). A filter module (10) is within the housing (44) and communicates with the inlet (45) and the outlet (43) such that fluid passing to the inlet (45) is filtered by the filter module (10) before passing to the outlet (43). The filter module (10) includes a filter membrane (11) of hollow cylindrical shape having an air throughput of at least 1300 normal cum/hr per 250 mm of the axial length of the membrane at an inlet pressure of 2 barg. Such a filter module (10) can be used in a process system (40) in which the module (10) supplies sterile air and is testable in situ.

Abstract: A filter element is provided comprising a media construction comprising a corrugated sheet secured to a flat sheet rolled into a coiled construction. The filter element includes a mounting flange secured to the coiled construction. The mounting flange projects radially from the outer, annular surface of the coiled construction. The mounting flange defines at least one fastener socket to allow for axial mounting of the filter element into a housing. An air cleaner includes a housing with filter elements, as described herein, operably installed within. Preferably, the filter element is sealed within suitable housings with a seal, such as a radially directed seal. Preferably, the filter element is secured to the housing by axial mounting of the mounting flange to the housing using fasteners. Methods for installing, assembling, using, and servicing are provided herein.

Abstract: The present invention relates to a pleated filter made of a multi-layer filter medium, including at least one filter paper layer having area weights of 30-100 g/m2, a microfiber nonwoven fabric layer having area weights 5-120 g/m2 and a support nonwoven fabric layer made of synthetic, polymeric fibers having area weights of 10-120 g/m2. The layers of the pleated filter contain fused polymer areas by which the fabric layers are bonded to the paper layer, and by which the fabric layers are made firmer within themselves. When subject to a fractional efficiency test at an initial pressure difference of at most 180 Pa, at a boundary speed of approximately 2.62 m/s and a flow speed through the filter medium of approximately 0.13 m/s, the pleated filter is able to separate at least 90% of particles greater than 0.3 &mgr;m, at least 92% of particles greater than 0.

Abstract: A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary blade driven by the motor to create a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing large solid particles from the air.

Abstract: A method and apparatus for separating fluid from exhaust air in a semiconductor cleaning device implements a separator box having at least one mesh layer disposed therein to assist in preventing separated fluid from entering exhaust ducting. The mesh layer reduces the amount of splashing and assists in maintaining an even air flow. Additional layers of mesh may be disposed above the first mesh layer to further assist in reducing fluid from entering exhaust ducting.

Abstract: Methods for cleaning air intake for a gas turbine system include utilizing filter arrangements that include a barrier media, usually pleated, treated with a deposit of fine fibers. The media is particularly advantageous in high operating temperature (140 to 350° F.) and/or high humidity (greater than 50 to 90% RH) environments.

Abstract: A filter is provided for coalescing droplets of oil in a stream of gas, comprising an oil coalescing layer of a microfibrous material and a second layer of an oil drainage material located downstream of and in face to face contact with the first layer. The drainage layer is for receiving oil from the coalescing layer and providing a path for oil to flow by gravity from the filter. Oil carry-over is reduced by providing a drainage layer which is a non-woven felt or wadding thermally bonded by bi-component polyester fibers.

Abstract: The filter system for filtering particulate material from a generally unidirectional fluid stream comprises a first filter removably positioned in the fluid stream and a second filter removably positioned in the fluid stream downstream of the first filter. The first filter comprises a pre-filter and includes a layer of fluid-permeable material having a plurality of spaced-apart openings extending completely therethrough. The method of utilizing the fluid filter system of this invention is also disclosed and comprises the steps of: (1) removably positioning a first filter in the fluid stream; and (2) removably positioning a fluid-permeable second filter in the fluid stream downstream of the first filter.

Abstract: Exhaust gases from an internal combustion engine operating with leaded or unleaded gasoline or diesel or natural gas, are used for energizing a high-speed gas turbine. The convoluting gas discharge causes a first separation stage by stratifying of heavier and lighter exhaust gas components that exit from the turbine in opposite directions, the heavier components having a second stratifying separation in a vortex tube to separate combustible pollutants from non-combustible components. The non-combustible components exit a vortex tube open end to atmosphere. The lighter combustible, pollutants effected in the first separation are bubbled through a sodium hydroxide solution for dissolving the nitric oxide, formaldehyde impurities in this gas stream before being piped to the engine air intake for re-combustion, thereby reducing the engine's exhaust pollution and improving its fuel economy. The combustible, heavier pollutants from the second separation stage are piped to air filter assemblies.

Abstract: A filtration system, includes a filtration unit and processor. The filtration unit operates to filter ablative particles generated by thermal imaging of media and transmits a signal corresponding to a parameter, such as a pressure or pressure differential, representing a current state of the operation of the filtration unit, such as the state of the filters, during the filtering of the ablative particles. The processor receives the transmitted signals and generates, responsive to the receipt of the transmitted signal, a signal representing operator information associated with the current state operation, such as a warning or instructions for correcting a deficiency, and/or a signal to stop the imaging of the media.

Abstract: An industrial vacuum assembly suitable for use with waste material hoppers, particularly bin-type hoppers, is described. The assembly includes a vacuum powerhead and a hopper. Mounted between the powerhead and the hopper is a vented partition adapted to collect fiberous material in the hopper and serve as a barrier to restrict the fiberous material from entering into the powerhead. The partition is adapted to disrupt the airflow within the hopper such that fiberous material drawn into the hopper becomes entangled together in the hopper.

Abstract: The use of fine fiber or fiber having a fiber diameter of about 0.0001 to 0.5 microns has become an important design tool for filter media. Common filter media have been prepared with a layer of fine fiber on typically formed the upstream or intake side of the media structure. The fine fiber increases the efficiency of filtration by trapping small particles which increases the overall particulate filtration efficiency of the structure. Improved fine fiber structures have been developed in which a controlled amount of fine fiber is placed on both sides of the media to result in an improvement in filter efficiency but a substantial improvement in lifetime.

Abstract: The present disclosure relates to systems and methods that use a hydrophobic medium to remove salt and moisture from the intake air of a gas turbine system. The disclosure also relates to systems and methods that use a two stage filtering process to remove particulate material, salt and moisture from the intake air of a gas turbine system. Particulate material is filtered from the intake air at a first stage air cleaner. Subsequently, salt and moisture are removed from the intake air at a second stage salt barrier located downstream from the first stage air cleaner. In certain embodiments, the second stage salt barrier uses a hydrophobic medium to remove salt and moisture from the intake air.

Abstract: A filter arrangement includes a first filter element having opposite first and second ends; an axial length between the first and second ends; and a plurality of flutes. Each of the flutes has a first end portion adjacent to the first filter element first end, and a second end portion adjacent to the first filter element second end. Selected ones of the flutes are open at the first end portion and closed at the second end portion; and selected ones of the flutes are closed at the first end portion and open at the second end portion. A sleeve member secured to and circumscribing the first filter element. The sleeve member is oriented relative the first filter element to extend at least 30% of the axial length of the first filter element. A seal member pressure flange at least partially circumscribes the sleeve member. The filter arrangement is particularly useful for gas turbine systems. Methods for operating and servicing filter arrangements preferably utilize constructions herein.

Abstract: This invention is directed to a method and system for purifying hexafluoroethane near its critical temperature and pressure, particularly where the hexafluoroethane contains at least about 1 ppb by weight of a non-volatile residue. A combination of a sand trap, an adsorption assembly made of a glass wool-molecular sieve-glass wool combination, and a filter is used.

Abstract: A separation device includes a casing and a first and a second rotation blade. A pulverization chamber is defined between the casing, the first, and the second rotation blade. Operating an urging device and at least one of the first and the second rotation blades, creates channeling vortices within the pulverization chamber. Fly ash containing unburned carbon is feed into the pulverization chamber, and through at least repeated self-collision, unburned carbon is segregated and reduced in size while remaining particular matter is similarly segregated and reduced in size. A method implements the separation device and provides simple results.

Abstract: A method and apparatus for preventing contamination of a substrate or a substrate surface, and particularly relates to prevention of contamination of raw materials, semi-finished products, base materials of products and substrate surface in a high-tech industry such as in the production of semiconductors and liquid crystals. A gas coming into contact with a base material or substrate is purified by dust removing apparatus and adsorption and/or absorption apparatus so that the concentration of fine particles in the gas is below class 1,000 and a non-methane hydrocarbon concentration is below 0.2 ppm. Thereafter, the base material or the substrate surface is exposed to this gas.

Abstract: The present invention refers to a device for high-purity filtering and disinfecting breathing air. The device includes a fine-dust filter and fan arranged on a housing. An elongate air flow tube is also arranged on the housing and is oriented to receive air flow from the housing. A second filter for disinfecting air is included in the elongate air flow tube. Arranged in series in the air flow tube are a third, main filter for removing microorganisms and a fourth, activated carbon filter for removing noxious fumes.

Abstract: A dual- or multi-layer filter medium for air filtration, having at least one meltblown layer (2, 2a and 5) at least one meltblown layer (2 and 2a) is placed on the inlet side of the filter medium. The meltblown layer has a pore size larger than that of the next following layer or layers.

Abstract: A filter device for removing combustion gases and/or particulate matter from air comprises a cooling unit and filtering unit. The cooling unit has an inlet for receiving an air stream containing combustion gases and/or particulate matter, a cooling member for lowering the temperature of the air stream, a first outlet for discharge of a condensate, and a second outlet for discharge of the air stream containing uncondensed particulate matter. The filtering unit has an inlet for receiving the air stream containing uncondensed particulate matter from the second outlet of the cooling unit, the filtering unit having at least one filter barrier through which the air stream passes, the filter barrier being configured to catch at least a portion of the particulate matter in the air stream. The invention is also for a process for removing combustion gases and/or particulate matter from an air stream.

Abstract: The present invention relates to methods and apparatuses for the purification and reuse of waste air mixed with additives (for example, solvents) or impurities, in particular for the purification and reuse of waste air mixed with solvents from dryer appliances of web-fed offset printing machines, in a first method step the waste air being led through at least one condenser in order to condense out additives or impurities contained in the waste air, in a second method step the waste air, treated according to the first method stop, being led through at least one separator element for the further purification of the waste air to remove condensed additives or impurities contained in it, and, finally, the waste air, treated according to the second method step, being recirculated for the renewed absorption or suction-removal of additives and impurities.