Abstract: A bottled water cooler has a bottle inverted into a cooling reservoir, and a double lipped gasket seals the bottle to the reservoir. Air is admitted, to permit water flow, through a conduit ending in a housing. The housing supports a removable, and replaceable, filter element carrying an extremely fine porosity filter medium. A check valve in the housing blocks the conduit unless the filter element is in place. The housing and conduit is mounted on the cooler cabinet in a shielded, but conveniently accessible, location.

Abstract: In an apparatus for filtering gases with a closed container which is divided by a horizontal perforated plate into a lower compartment provided with a gas inlet and an upper compartment provided with a gas outlet, and with tubular or candle-shaped filter elements which are sealingly suspended in holes of the perforated plate and are supported by a flange-type enlargement at their upper end on the perforated plate, in order to also ensure reliable sealing during swivel motion of the filter elements relative to the perforated plate, it is proposed that the flangetype enlargement form a bearing surface which lies on the surface of a sphere with center point above the bearing surface and on the vertical center axis of the filter element, and that the hole in the perforated plate so surround at a distance the filter shell of the filter element downwardly adjoining the enlargement that the filter element can swivel over a certain angular range about the center point of the sphere.

Abstract: A filtering device includes a head intended to be permanently installed in a fluid dispensing machine and a disposable canister therefor. A central chamber is formed in the head which chamber is in communication with an inlet port and an outlet port for receiving an unfiltered liquid and supplying a filtered liquid, respectively. The disposable canister has a flask shaped main body with a flat top and a neck of substantially uniform diameter on the top. The neck fits in the central chamber. A tube extending through the neck defines an annular clearance between the tube and the interior of the neck which annular clearance is in fluid communication with the inlet port. The opening into the tube located at the top of the neck is in fluid communication with the outlet port in the head. A pair of tab receptacles on the head and a complementary pair of tabs on the canister are engageable with one another by 1/4 rotation of the canister to lock the canister to the head.

Abstract: An air filter assembly for a power tool such as a chain saw is provided. The assembly includes a housing with upper and lower components sandwiched about a filter element. The lower housing component includes a plurality of apertures arranged about its periphery for uniformly introducing air into the filter and through an outlet. The outlet is connected to a flexible coupling element adapted to be secured to the carburetor of an internal combustion engine which drives the tool. The upper and lower housing components are easily separated to permit access to the filter element.

Abstract: A filter assembly including a base for supporting and providing fluid connection to a removable filter cartridge, the base having a hollow connecting end for mating with the cartridge, a removable filter cartridge comprising a filter medium and having a connecting end shape to mate coaxially with the end of the base in a rotatable, telescopic relationship, the connecting end of one of the base and the cartridge having lug means extending radially toward the end of the other, the other connecting end having corresponding passage means for lockably receiving the lug means, the telescopically related mating ends of the base and cartridge providing radially opposed surfaces of circular cross-section about the mutual axis of the connecting ends of the base and cartridge, and a circular elastomeric sealing ring providing a radial seal between the circular cross-section surfaces, preventing liquid flow past it between the telescopic ends.

Abstract: A supporting structure for ceramic tubes in a gas system in which a plurality of stages of tube support plates are provided in a substantially horizontal manner in a container, and ceramic tubes are supported with their axial lines being substantially vertical between the vertically adjacent tube support plates so that through holes formed in the tube support plates are communicated with the inner passages of the ceramic tubes, and metallic ring holders are respectively fitted to the outer periphery of the lower end portion of the tubes with interposed compacted layers while the metallic ring holders are in contact with the lower end faces of the tubes, and the ring holders are respectively in contact with and are supported by the tube support plates which are placed below the ring holders. Engaging means of the ceramic tubes to the tube support plates is also disclosed.

Abstract: A device for the support of ceramic catalyst monoliths especially of square cross section as well as for the combination of several of such monoliths into one package. It is formed of an elastic gasket attached on one or both monolith ends and a metal frame attached on the gasket under pressure. The frame has recesses on two adjacent lateral surfaces, and at the two opposite lateral surfaces it has projections which can engage interlockingly into the recesses of adjacent frames.

Abstract: A bottled water cooler has a bottle inverted into a cooling reservoir, and a double lipped gasket seals the bottle to the reservoir. Air is admitted, to permit water flow, through a conduit ending in a housing. The housing supports a removable, and replaceable, filter element carrying an extremely fine porosity filter medium. A check valve in the housing blocks the conduit unless the filter element is in place. The housing and conduit are mounted on the cooler cabinet in a shielded, but conveniently accessible, location.

Abstract: An easily manipulable camming mechanism is disposed within a cavity designed to hold a standard nuclear biological filter within an environmentally sealed military vehicle. The camming mechanism utilizes a cammed actuator to transfer a motive force to a spring which urges a piston to engage or disengage an inlet or an outlet of the filter. The spring ensures that seals on the filter are compressed to the proper force and absorbs excessive torque which might damage the filter or the mechanism.

Abstract: This is concerned with an air filter cleaning arrangement in which the filter element, meaning the pleated filter media and its frame, is functionally connected to a vibrator so that it is resiliently or vibrationally isolated from the surrounding structure. The major effective component of the vibratory motion applied to the filter media is across the width of the filter pleats. The invention is used primarily in an industrial sweeper. It can also be used in other machines or equipment which have air filter.

Abstract: A gas filter canister housing assembly (20) capable of receiving gas filter canisters (28 or 40) of differing heights. The housing assembly includes first and second housing portions (54, 56) and holding apparatus (60) capable of holding the housing portion together. The first housing portion has a cylindrical extension (70) in which a filter canister may be disposed, and the second housing portion includes a cup-shape end portion (102) and a depending flexible skirt (100) which may be held against the cylindrical portion (70) in various positions of adjustment.

Abstract: A releasable clamping apparatus for securing cartridge filter elements to a tube sheet of a dust collector apparatus. The clamping apparatus includes a clamping band which surrounds the filter element. The tube sheet includes a plurality of spaced apart J-shaped support clips surrounding each opening in the tube sheet. A plurality of latches are attached to the clamping band and cooperate with the support clips to secure the clamping band and the filter element to the tube sheet.

Abstract: A room air treatment system in which air is drawn through a large particle prefilter, a first carbon filter, a second dual honeycomb matrix carbon filter in which the honeycomb cells in adjacent matrices are offset relative to one another, a blower mounted on vibration isolation mounts and is expelled by the blower into a plenum from when it exits upwardly through a fine particle HEPA filter and finally out through a final filter which is a combination fine particle filter and carbon filter. A filter change warning system is provided which includes a 3500 hour filter change indicator, an every 7000 hour filter change indictor, a back-up warning indicator, a mute button for muting the warning indicator and a recycle system for restarting the hour count.

Abstract: A filtering unit for filtering particulates from high temperature gases uses a spiral ceramic spring to bias a ceramic, tubular filter element into sealing contact with a flange about an aperture of a metallic tube sheet. The ceramic spiral spring may contact the upper edge of the filter element and be restrained by a stop member spaced from one end of the tube sheet, or the spring may contact the bottom of the filter element and be restrained by a support member spaced from the opposite end of the tube sheet. The stop member and support member are adjustably secured to the tube sheet. A filtering system uses the ceramic spiral spring to bias a plurality of ceramic, tubular filter elements in a respective plurality of apertures in a tube sheet which divides a vessel into upper and lower enclosed sections.

Abstract: A filtering apparatus for separating particulates from a hot gas stream using hollow, tubular filter elements has a housing with a laterally extending support plate for the filter elements separating the housing into upper and lower sections. The tops of the filter elements are biased against the support plate and the bottoms thereof restrained from lateral movement by restraining rings. Blowback and purge gas systems provide for cleaning of the filter elements and maintenance of the blowback system clear of the solids or condensation products that might form during the separation. The apparatus is especially useful in filtering solids from a hot, corrosive gaseous stream, such as a zirconium tetrachloride process gas stream, where the gas stream contains gaseous constituents that are subject to condensation or solids formation during separation of the particulates and prior to discharge from the filtering apparatus.

Abstract: An assembly of a tubular filter member (2) inside an envelope (5) surrounding the member includes a gasket (9) of elastomer or polymer material disposed at at least one of the ends of the filter member and of the envelope in between the outside surface of the filter member and the inside surface of the envelope.The outside surface of the filter member is provided over at least a portion of its surface area facing the gasket with roughnesses (11) or projections or hollows of sufficient size and number to prevent the filter element from sliding longitudinally relative to the gasket.Such an assembly is applicable to microfiltration, ultrafiltration and reverse osmosis.

Abstract: A dust trap for trapping particles such as dust in a gas pipe between a street tap and a diaphragm type regulator comprises a dust bag for trapping the dust and a retaining member for holding the dust bag in the pipe. The retaining member is of deformable material and has an outer portion of increased diameter for force-fitting the member in the pipe, and a neck portion over which the end of the dust bag is placed and securely held, for example by an outer sleeve fitted over the neck portion.

Abstract: An air-purifying apparatus comprising: a main body having an intake portion and an outlet portion; a blower disposed in the main body and adapted to induce the ambient air through the intake portion and to forward the air to the outlet portion; and a high-voltage generating means mounted in the main body; wherein the intake portion includes a intake grille, first and second net-shaped electrode plates disposed along the inner side of the intake grille and opposing each other with a large potential difference developed therebetween by the high-voltage generating means, the first net-shaped electrode plate being remoter from the intake grille than the second net-shaped electrode plate, and an air-permeable filter made of a dielectric material disposed between the first and second electrode plates, and wherein at least the intake grille and the second net-shaped electrode plate being detachable from the main body.

Abstract: A gasket (16) for sealing between a filter (10) and a support tube (12) adjacent a seat ring (14). A first sealing surface (18) is provided on the gasket (16) for sealing axially against the seat ring (14). A second sealing surface (20) on the same gasket (16) for lateral sealing against the support tube (12) to maintain a sealed condition when axial sealing cannot be sustained.

Abstract: An air cleaner for miniature internal combustion engines to be used on model boats, airplanes, and the like, which is comprised of a tubular elastic boot and a removable filter unit. One end of the tubular elastic boot is stretched over and sealingly attached to the air inlet of the engine. Into the other end of the elastic boot member is inserted the filter unit so that all the air entering the engine must pass through the filter. The filter unit is comprised of a porous open cell foam medium which is supported on a peripheral flange to sealingly engage the elastic boot member.

Abstract: There is disclosed a readily assemblable, inexpensively manufactured table top air filter of the type having a circulating fan. A unitary housing has sides and a top which defines air outlet openings. The bottom of the housing is open. A fan support assembly mounts readily within the housing where it is retained by stops and latch members which are integral with the housing sides. A replaceable filter is also mountable within the housing in line with the fan-induced air flow.

Abstract: A housing for an air filter having a detachable cover and base plate on opposite ends. The cover and base plate are secured to the housing by means of a clamping ring which is provided with a sealing gasket and/or O-ring for perfecting a seal therebetween. The cover includes a receptacle for receiving an inlet duct which is secured to the cover by a clamping ring. The housing includes a receptacle for an outlet duct which is secured to the housing by a clamping ring. An air filter is disposed within the housing to form an inlet plenum and an outlet plenum which facilitate airflow through the filter element. The cover includes a collar for securely locating the air filter element within the housing.

Abstract: An improved filter bag assembly is shown for use in a filter bag house having a plurality of filter bags, each of the filter bags being anchored at a lower end and being suspended within the bag house in tensioned relation by an upper end thereof. A bag spring is attached at one side to the bag upper end and has an opposite spring side. The bag spring is tensionable between tensed and relaxed positions. A flexible strap is provided having a spring engaging end attached to the bag spring opposite spring side and has a free end. A hanger is suspended within the filter house and the flexible strap free end is engageable with the hanger when the spring is tensed whereby relaxing the spring serves to tense the filter bag.Preferably the bag spring is a butterfly-shaped member having a central, helical coil and a pair of angularly arranged spring sides extending outwardly from the coil.

Abstract: A strainer device for railroad car air brake combined dirt collector and cut out cocks, and arranged to be applied within the swirl chamber of such cocks, and between the collector bowl, about the pedestal thereof, and the lip of the cock throat chamber, which strainer device comprises an outer shell that is open and flanged at both ends, with one end of the outer shell being disposed adjacent the throat lip, an annular seal applied between the said outer shell one end and the throat lip, an inner shell disposed within the outer shell and secured at the other end of the outer shell and adapted to receive the cock collector chamber pedestal, and a compression spring received about the pedestal within the cock collector bowl and resiliently seated against the outer shell end flange at that end of same for spring biasing the other end of the outer shell and the seal against the throat lip.

Abstract: In a dust filter baghouse which employs a small-diameter filter cartridge, the same attachment structure is adapted for installation of the cartridge from either below or above the baghouse tube sheet. The cartridge has an annular cap having an external bead which is received within an annular recess of a skirt portion of a hollow boot which is clamped to the cap of the cartridge and extends up to the tube sheet. Where the cartridge has to be installed from below the tube sheet, a cylindrical cup is provided having an inward flange at its upper end which is secured to the tube sheet. The cylindrical cup has an annular external recess which receives an annular internal bead on the hollow boot. Where the cartridge is installed from above the tube sheet, an external annular groove in an outwardly extending flange at the upper end of the hollow boot is received within the peripheral edge of the hole in the tube sheet.

Abstract: A filter cartridge is suspended from a baghouse tube sheet by an array of generally vertical spring metal fingers which are welded to the upper edge of the filter cartridge. Each of the fingers has an inward projection, a bag cup having an external annular groove is suspended from the tube sheet. The filter cartridge is installed by pushing it upwardly toward the tube sheet. When the lowermost edge of the bag cup is engaged by the inward projections on the fingers, the fingers are cammed outwardly and the inward projections ride on the wall of the bag cup until they come into registry with the annular groove in the bag cup at which time they snap into the groove, thus latching the filter cartridge. A hosetype clamp secures the filter cartridge after it has snapped into latched position.

Abstract: A filter assembly comprising a filter retainer apparatus, an air filter frame and having a removable pleated filter media. The pleated filter element is secured within the frame by the retainer apparatus which comprises an expandible retainer having elongated flanges disposed on opposite ends. One flange is secured to a rod which slidably fits within a sleeve to which the other flange is attached. Resilient apparatus, preferably an elongated helical spring positioned between the sleeve and the rod, keeps the flanges in spaced relationship. One of the flanges engages one end fold in the filter element and forces it into contact with the frame. The rod is then forced into the sleeve compressing the spring and the other flange engages the other end fold of the filter element, forcing the other end fold into contact with the frame. The spring forces the rod and the sleeve apart so that the flanges securely hold the filter element in the frame.

Abstract: In a reverse-air dust collector, each of a plurality of small-diameter filter cartridges is suspended from the baghouse tube sheet in registry with one of the tube-sheet openings by a cap adhesively secured to the filter cartridge and a collar having a shoulder adhesively attached to the cap. The collar has an outwardly flared rim and a depending annular portion which is press fitted into a double-beaded outwardly-spring-biased fabric cuff which is positioned between the depending collar portion and the edge of the opening in said tube sheet. The upper bead of the cuff rests on and is supported by the tube sheet. The rim of the collar rests on and is supported by the cuff.

Abstract: A vacuum cleaner is provided with a dirt cup and a dirt cup holder that telescopically engages with a handle of the cleaner for the guidance of it as the handle of the cleaner pivots relative to the main body of the cleaner.

Abstract: An arrangement for connecting an air filter for automotive vehicles to an associated carburetor. The filter including a cap and a housing having at least one sleeve projecting from the bottom wall thereof. Said sleeve being closed at its free end by a cross wall provided with a slot which is registerable with complimentary slots in the cap. A connecting device comprising a seat for the end of a pin permanently fixed to said carburetor and projecting from it. The seat is in an insert having on its outer surface two diametrically opposite ribs adapted to engage teeth provided on surfaces facing each other of two diametrically opposite legs when the insert, on moving upwardly, penetrates between the legs, thereby catching the end of the pin. At the end of the connecting device opposite the seat is a head adapted to be received through said registerable slots and rotated relative thereto to thereby secure the assembled filter relative to the carburetor.

Abstract: A two stage air filter adapted for use on an air pump as used in a motor vehicle for emission requirements, has a cylindrical, coarse filter element mounted along one end to a broadside of a thin, rigid baffle plate and a cylindrical, fine filter element mounted along one end to the other broadside of the baffle plate. The baffle plate cooperates with the end bell of the air pump to snappingly retain the filter in the pump and to compressingly hold the fine filter element inside the end bell.

Abstract: An air filter bag is disclosed for use in vacuum cleaners. The filter bag includes a plastic collar having an annular rim for retaining the collar on a flanged inlet air duct and for establishing an air seal with the duct. The collar also includes an annular sealing lip spaced radially inward of the rim which engages a peripheral surface of the air duct thereby providing a dual sealing arrangement. In order to facilitate removal of the filter bag from the duct, the collar is provided with a tab portion integrally attached to the rim.

Abstract: A filter assembly for use especially with air conditioning and heating ducts, comprising first and second rectangular frames, the latter frame being detachably positioned in the first one, and a filter element sandwiched between the rear end of the second frame and a flange seat on the first frame. Interiorly separable snap lock elements on the first and second frames serve to retain the latter frame and filter element in position in the first frame. The second frame is formed into a louver or grill and includes a plurality of horizontally-spaced and inclined slats, the spacing being so as to permit ample flow of air through the assembly, the slats serving as a handle for the insertion and withdrawal of the second frame relative to the first one.

Abstract: A rotary drum filter apparatus comprising a rotary drum, a plurality of axial, parallel slots spaced circumferentially around the drum, a filter cloth positioned peripherally around the drum and portions thereof extending into each of the axial slots, flexible metal means inserted into each of the slots over the portion of the filter cloth extending into the slots and caulking means for holding each of the metal means and each of said portions of said filter cloth in a locked position in their respective axial slots. The metal means may comprise a stranded metal cable wherein caulking means are unnecessary.

Abstract: An air cleaner which includes a support (23) having a first concave conical surface (26) and compression means (50) extending along the axis of said surface away from the apex of said surface; an hollow inner filter (37) including a first end cap (41) with a rim (43) defining a first convex conical surface having the same apex angle as said first concave surface, and a second end cap (42) for axial engagement by said compression means; and a hollow, outer filter (32) including an end cap (57) with a resilient lip (61) extending inwardly to be sealingly received between said conical surfaces when said compression means engages said second end cap. The second end cap of the inner filter may have a second convex conical surface (47), and the outer filter may have a second end cap with a resilient lip extending to be sealingly engaged by the second convex conical surface.

Abstract: A structure for supporting an air filter on a carburetor, the air filter having a casing accommodating an air filtration element and a cap adapted to close the upper opening of the casing, the cap being adapted to be centered and fixed to the carburetor by a cooperation of a center bolt projecting upward from the carburetor and a butterfly nut. The supporting structure has a supporting member adapted to be fixed to the carburetor, an annular disc-shaped first resilient member connected at its inner periphery to one end of the supporting member and at its outer periphery to the casing of the air filter, and a second resilient member through which the cap of the air filter is fixed to an opposite end of the supporting member. The vibration of the casing and the cap of the air filter is avoided thanks to the first and the second resilient members which insulate the casing and the cap from the vibration caused by the engine to which the air filter is attached.

Abstract: An air-filter assembly having a filter cap and a filter case, both being made of elastic material such as synthetic rubber and which are formed integrally with each other. The air filter assembly is provided at an air inlet pipe portion of a valve for use in an exhaust gas emission cleaning system.

Abstract: A filter bag support member for fastening a filter bag to an apertured bag header plate member disposed between the dirty gas inlet and the clean gas outlet of a filter bag housing comprising a flow-through venturi-like tube having one end releasably fastened to the plate member and a clamp at the other end receiving the filter bag in supporting sealed relation.

Abstract: A filter for preventing the infiltration of contaminants into a kinescope envelope, includes a ring having a sloped surface to conform with the conical section of the kinescope neck. The ring also includes a support portion to which is affixed a non-oxidizable fluid permeative member. The ring is configured and dimensioned to rest against the inside surface of the conical neck section through a temperature range of approximately 20.degree. C. to 500.degree. C. so that fluid enters the envelope only through the permeative member. Specially configured clips remain resilient throughout the 20.degree. C. to 500.degree. C. temperature range to hold the filter in the conical section.

Abstract: An air prefilter is disclosed for use with internal combustion engine air filters of the type having replaceable filter elements. The prefilter has a perforated sleeve connected between the usual intake openings and the filter element of the conventional air filter. This perforated sleeve is enveloped by an open-pore foam filter medium, which is of such porosity that engine intake air primarily passes therethrough rather than through the intake openings of the conventional air filter. The prefilter prevents foreign matter and water vapor from reaching and blocking the conventional filter element, which blocking causes the engine to receive insufficient air for efficient combustion. When the prefilter medium is saturated or blocked with impurities, the conventional air filter operates as usual, until the prefilter medium is cleaned or replaced. An adjustable deflector helps prevent foreign matter from blocking the prefilter medium.

Abstract: An improved cylindrical two-stage air cleaner in which the overall efficiency of the cleaner is improved by changing the configuration of filtering means therein from a cylindrical one to a conical one, and in which improved structure is included for sealing the cleaner to prevent passage of incoming air to the outlet without being cleaned, and to automatically scrape particulate matter from the inside of the cleaner housing each time a principal filter is changed.

Abstract: A bag assembly is described for the filter bag collectors used in spray dryers or similar equipment which permits a quick change to fresh filler bags. The bag assembly includes a cage-like support for each of the individual filter bags which is inserted within the bags and which includes a bag attachment and sealing ring at its outer end. A pin-type connecting device employing a simple lifting and turning movement permits the bag assemblies to be quickly removed and remounted.

Abstract: Disclosed is a cylindrical closed strainer molded of a plastic in a unitary structure, which comprises a top plate, a bottom plate disposed opposite said top plate at a fixed interval therefrom and a cylindrical net stretched between the peripheries of said top plate and bottom plate, said top plate being possessed of snap fastening means on the upper surface thereof and provided with a through hole which has a diameter larger than the outside diameter of a suction pipe intended to be connected with the strainer body and is provided on the inner circumference of said through hole with a thin seal member coaxially containing a circular hole of a diameter smaller than said outside diameter of the suction pipe. Said suction pipe is provided with a flange which is adapted to rest stably on the upper surface of said top plate.

Abstract: A damping tube-shaped bypass measurement section with protective maintenance features and continuous flow velocity scanning on absorptive filtration units in the nuclear engineering field is disclosed. The bypass measurement section comprises a tube-shaped bypass measurement section, having single or double elements, for absorption filters, featuring at least one shut-off device, and including an absorption layer thickness connected to the main filtration unit which is to be controlled or monitored, and provides for an equivalent absorption layer thickness.

Abstract: An improved gasket means for suspending a filter element from a venturi air nozzle in a dust collector. The gasket means is an annular member of elastomeric material and has an annular recess in the inner side wall in which is received the flared bottom lip of the venturi air nozzle. The annular recess is disposed between first and second rim portions. The annular member has an inside diameter at the second rim portion greater than the inside diameter at the second rim portion. The gasket means includes a structure for securing a filter element to the annular member.

Abstract: This invention relates to a tube filter assembly of the kind comprising a housing divided by a perforated wall into a dirty gas chamber and a clean gas chamber, and containing filter tubes which are attached to said perforated wall in a sealed fashion and are arranged to be cleaned periodically by counter-current scavenging from the clean gas side, said filter tubes being arranged in said dirty gas chamber, covering the holes in said perforated wall at their open ends, and being provided with an internal spacer member.

Abstract: A device for forming demonstration cleaning-test bags and for attaching them to vacuum cleaners comprises basically a cylindrical tube adapted for placement over the air-discharge port of a sweeper, and a co-operating plunger for pushing the central area of a flexible filter cloth or sheet into the tube. The end of the plunger has fixed thereto a hook-type VELCRO disc for engagement with a co-operating loop-type VELCRO disc cemented or stitched centrally of the filter sheet. Thus the inserted sheet can be turned inside-out to form a bag but after the sheet margin has been anchored to the outer lip surface of the cylindrical tube by a contracting coil-spring band which is rolled thereover from an annular plunger seat encircling said lip. For adjustment to different sizes of bag-forming sheets, the band-holding plunger-seat can be slidable along the plunger, or the plunger body can be length-adjustably formed from telescoping sections.

Abstract: An improved air cleaner having a filter specially adapted for ready insertion and removal without tools, and for improvement of the seal against direct air flow between the inlet and outlet of the cleaner.

Abstract: An adsorbent unit including a container, adsorbent in the container, a resiliently flexible flap having a first portion attached to the container and having an aperture in a second portion thereof which is adapted to fit over a conduit, with the dimensions of the aperture and the conduit being such that the resilient flexibility of the flap will cause it to lock to the conduit in the area of the aperture.

Abstract: An improved filter bag mounting assembly for fabric type dust collectors compositely constituted of a selectively shaped mounting and filter media supporting member adapted for removable insertion in a complementally sized receiving aperture in a tube sheet, a filter media sheathed retainer assembly terminally connected at one end, in releasably latched gas tight relation to the mounting member and a closure plug disposed in the other terminal end of said media sheathed retainer and secured thereto in releasable gas tight latched relation.