Abstract: A pre-filter device for use with filter canisters is described which will prevent pressure build-up, clogging and engine damage. The pre-filter device comprises a metal screen having a relief port positioned within the pre-filter device for collecting the majority of the larger metallic particles and debris suspended within the oil.

Abstract: A method for manufacturing a paste for forming a thick film is provided, in which undesired lump materials are efficiently removed from the paste for forming the thick film. The paste, which contains a solid material and an organic vehicle and has a viscosity in the range of about 1 to 50 Pa·s, is filtrated with a sintered metal type filter manufactured by integrally sintering a nonwoven fabric filter part, having a thickness of many folded linear metal fibers and having a mesh opening size of about 1 to 20 ?m, and a wire gauze part composed of metal wires knitted into the shape of a mesh.

Abstract: The invention relates to a filter element for fluids, in particular for hydraulic fluids, comprising a filter material and a grid-like supporting structure supporting the filter material at least on its outflow side in relation to the flow direction of the filter element. In order to further develop the filter element such that it has a high mechanical stability, whilst static charges are avoided, it is proposed in accordance with the invention that the supporting structure comprise elements made from a plastics material and electrically conductive elements.

Abstract: An engine block on an engine with angled oil outlets adapted to engage a reusable fluid filter, consisting of: a pre-cast filter-connecting segment; the pre-cast filter-connecting segment having a filtered oil inlet in fluid communication with the engine and also including a number of angled oil outlets in fluid communication with the engine. The angled oil outlets are arranged circularly about a central axis of the pre-cast filter-connecting segment, and extend downwardly from the engine block at a first angle and outwardly at a tangent to a cylindrical reference surface parallel to the central axis.

Abstract: A self-cleaning strainer which may be installed upstream of a heat exchanger to prevent debris greater than a critical size from reaching the heat exchanger. The strainer is preferably mounted just upstream of a heat exchanger in order to minimize the possibility of debris reaching the heat exchanger. The strainer comprises a screen element which can be advanced across the flow path of the fluid between two rollers. The screen element is placed so that the fluid must flow across the screen element face to continue through the process pipe; the screen may be perpendicular or parallel to the fluid flow axis of the strainer body or at an intermediate angle to it. Flow blocking members are used so as to direct the flow to pass through the screen element.

Abstract: A liquid/solid separator system mounted on a mobile cart and connected to a process tank for reducing the rate at which fluids are consumed in manufacturing processes. The system may include automation and also may include a shear stepped screen including tilted wire wedge wires arranged at varying cant angles. The system may include a fine screen basket received in a settling box.

Abstract: An expandable well screen has a desirable thin-wall construction together with a simplified fabrication method. In fabricating the screen, a flexible sheet of metal mesh filter media is diffusion bonded to an inner side of a perforated metal sheet which is then deformed to a tubular shape to form a filter structure having an outer perforated tubular shroud interiorly lined with the filter media. The tubular filter structure is telescoped onto a perforated base pipe and has its opposite ends sealingly secured thereto to complete the expandable well screen.

Abstract: In the rotationally symmetrical screen for fiber suspensions with a series of straight profiled bars which extend the direction of the screen axis and form slot-shaped screen openings between them, and with several ring-shaped profiled bar supports lying in planes extending perpendicularly to the screen axis, each of the profiled bar supports having in its edge region adjacent to the inlet side of the screen a series of cutouts opening towards the inlet side of the screen for insertion of the profiled bars, with the shape of these cutouts corresponding to the configuration of the cross-sectional regions of the profiled bars held positively in these cutouts, in order to simplify insertion of the profiled bars into the cutouts of the profiled bar supports each profiled bar has for each profiled bar support a recess which decreases the width of this cross-sectional region of the profiled bar, and the recesses lie outside the profiled bar supports in the finished screen.

Abstract: In order to develop a filter material composed of stacked grid members, the invention proposes a filter material consisting of two stacked grid members that have a weld joint between them.

Abstract: A screen unit for removing solid particles from a viscous mass, for example molten plastic. The screen unit includes a housing provided with a supply channel and a discharge channel for the viscous mass, a screen element in the housing between the supply channel and discharge channel, a backflush channel for discharging during backflushing solid particles screened by the screen element and connected to an outflow channel by a shutoff valve, and a pressure element which can be operated to flush back the viscous mass through the screen element at a pressure higher than the pressure in the supply channel. The shutter element is placed along the screen element, and the shutter element is caused to move with respect to the screen element such that during the screening phase the screen element is gradually more exposed for screening and during the backflushing phase the screen element is gradually less exposed to the backflushing action.

Abstract: A screen panel for a wood-chip digester comprises a screen plate having a plurality of slots therein that are curved in the form of an arc. Each slot has a width in the range of from 3 mm to 10 mm. One form of slot has a generally parallel-sided middle portion in the middle of the thickness of the screen plate, which middle portion has a width in the range of from 3 mm to 10 mm, and a portion that tapers out at an angle on each side of the middle portion, at a half-angle in the range of from 5° to 20°, for approximately one quarter of the thickness of the plate. Another form of slot tapers out from one side of the plate to the other side. All of the slots have their concave sides facing in the upstream direction of chip flow in the digester.

Abstract: A spacer mesh is provided and is configured to separate a first ion conducting membrane from a second ion conducting membrane to define a space between the membranes, comprising a plurality of strands consisting essentially of a polymer having a heat distortion temperature of at least 90° C. at 66 psi, and a melt flow index within the range of 3 g/10 min to 6 g/10 min, and being chemically stable at pH>13 or pH<2. The spacer mesh includes a first plurality of spaced apart substantially parallel strand elements, and a second plurality of spaced apart substantially parallel strand elements, wherein the first plurality of strand elements and the second plurality of strand elements are connected to define a netting having a plurality of apertures, each of the apertures having a plurality of vertices defined by a pair of intersecting strands, and a distance between non-adjacent vertices in an aperture is less than 10/1000 of an inch.

Abstract: An apparatus for preventing erosion of wellbore components comprises a wellscreen and a coating disposed on the wellscreen. The coating includes a metal-based coating and preferably nickel and phosphorous. The coating may also be organic-based such as phenolic resin containing ceramic or cermet. A method for fabricating an erosion and corrosion resistant wellbore component by providing the wellbore component and treating the wellbore component with erosion resistant materials. The treating step is conducted by plating the wellbore component, preferably by electroless plating. The treating step further comprises heat treatment of the wellbore component subsequent to plating. An additional step of inserting the treated wellbore component into a wellbore may also be conducted.

Abstract: A filter cloth whose underside comprises substantially parallel, additional yarns 8 that are thicker than the rest of the yarns of the cloth, substantially parallel channels 9 being formed between the yarns, wherein filtered liquid passed through the cloth is allowed to flow in the direction of the surface of a filtering element 10 between the filtering portion of the cloth and the surface of the element. The invention further relates to a filtering module manufactured from the filter cloth of the invention.

Abstract: A lint catching bag for attachment to the discharge end of the discharge hose for a washing machine; the upper end of the lint bag includes a drawstring, or elastic device that gathers the upper end of the bag, as it is placed over the end of the discharge hose, and a clamp may be fastened in place, to firmly tighten and secure the bag to the end of the hose, as the two are located in proximity with a sewer drain, or deposited downwardly into the drain pipe, for discarding of the discharge water from the washing machine, while capturing lint and preventing its entrance into the sewer line.

Abstract: A vehicle fuel filter for mounting to a fuel pump in a fuel tank comprises a tubular body having an axis, a first end and a second end opposite the first end; a pump connection neck positioned on the first end of the tubular body and having a filter outlet opening for mounting the filter on a fuel pump intake tube, the filter outlet opening having an axis at a substantially right angle to the axis of the tubular body; an inlet opening on the second end of the tubular body, the inlet opening extending axially in the direction of the axis of the tubular body; an envelope of filter fabric surrounding the inlet opening such that fuel entering into the envelope can pass into the tubular body through the inlet opening; and a supporting body fixedly connected to the tubular body at the second end and at a predetermined angle to the tubular body, at least a portion of the supporting body preventing the filter envelope from collapsing.

Abstract: A paint strainer dimensioned to fit in a vertical position in a paint bucket, in a vertical plane passing through the center of the paint bucket, dividing the paint bucket into a receiving side and a strained paint side. The paint strainer has a strainer frame around the perimeter of the paint strainer which defines the bottom sides and top of the paint strainer, and has a paint screen which is secured and sealed to the strainer frame. A pair of bucket top brackets, one affixed to the top of each side of the strainer frame, secures the paint strainer to the paint bucket.

Abstract: A one-piece filter cartridge is formed by inserting an open ended cylindrical screen and an end screen for the cylindrical screen in a mold and overmolding with engineered resinous material to form spaced annular and axial support ribs for the screen material. The cartridge is suitable for use in an hydraulic circuit for filtering bi-directional and radial flow without backwashing trapped particles from flow in one axial direction. One of the ribs has an annular groove for a seal ring for sealing about the cartridge upon insertion in a flow passage.

Abstract: A filter cloth whose underside comprises substantially parallel, additional yarns that are thicker than the rest of the yarns of the cloth, substantially parallel channels being formed between the yarns, wherein filtered liquid that passed through the cloth, is allowed to flow in the direction of the surface of a filtering element between the filtering portion of the cloth and the surface of the element. The invention further relates to a filtering module manufactured from the filter cloth of the invention.

Abstract: An agricultural or industrial water filter comprises a spin plate, a flow distributing sleeve, and a cone basin. The spin plate includes fluid passageways disposed at a 20 degree angle relative to the axis of the filter. The flow distributing sleeve is disposed in between the screen and the filter chamber. The screen may be oversize with a screen area that is a multiple of the screen area of a standard screen. The sleeve comprises a plurality of axial slots which are more narrow at the proximal side and wider at the distal side. The end cap is coupled to a bottom of the filter chamber and disposed adjacent to a bottom of the screen. The end cap comprises a cone coupled to the top of a basin. The cone extends upwardly into the space within the screen. A narrow annulus with a small cross-sectional area is formed between the bottom edge of the cone and the top of the basin. The basin includes a flush tube to flush out particles collected in the basin and to cause a high velocity flow through the annulus.

Abstract: A method is described for making a reinforcing wire frame for embedding in a moulded polymer support frame over which woven wire cloth is to be stretched and secured to form a sifting screen. The method involves locating lengths of cut wire substantially equally spaced apart in a jig to form a first array. A second array of lengths of cut wire is located over the first array with the lengths of wire in the second array being substantially at right angles to those of the first array. The lengths of wire in the first and second arrays are resistance welded at points of mutual intersection so as to form a first substantially rectilinear matrix.

Abstract: A curb inlet filter for temporarily enclosing the curb inlet of a storm drainage system during the construction of a road system in commercial and residential developments is adapted to be placed adjacent a curb inlet in order to enable storm water runoff to drain into the inlet while preventing silt and debris from being carried into and collected therein. The curb inlet filter includes an elongated body having a first and a second end to which are attached first and second weighted anchors. The elongated body includes a filter medium that may enclose a support member. The filter medium filters silt and debris from water passing through the filter and the weighted anchors help to maintain the filter in place adjacent the curb inlet.

Abstract: The present is basically comprised of a piece of polypropylene woven mesh cut to the size of the catch basin inlet opening grate, of a heavy-duty, partially-resilient rubber open frame member superimposed upon the woven mesh with peripheral butyl rubber adhesive strips, of peripheral butyl rubber adhesive strips secured to the underside of the woven mesh, and preferably a readily removable backing strip contacting the underside peripheral butyl rubber adhesive strip to avoid temporary and inadvertent adhering of the assembly in unwanted places.

Abstract: A screen material having a flexible member. The screen material includes closely spaced filter wires supported by a plurality of support members. A stranded cable is used as the support members to provide flexibility to the screen material. The filter wires are welded to the members and define filter gaps between adjacent filter wires to allow liquid and small particles to pass through, while retaining particles too large to fit through the filter gaps.

Abstract: A multi-micron, multi-zoned woven metal wire mesh for the production of sand control screens. The multi-zone, dual micron layer is spirally wound on top of a perforated metal pipe. Second and third metal mesh filtration layers are spirally wound on top of the three-zone, dual micron layer, respectively. A perforated metal shroud is placed on top of the entire assembly to protect from the surrounding environment and acts as a protective cover.

Abstract: A braided strainer for a draw line, and method of forming same. The strainer comprises a frame in the form of a pair of spaced planar plates, one being a solid end plate and the other having a control aperture. A plurality of spaced, parallel rods of similar length are positioned near the peripheries of the plates and secured and extending between the plates. A plurality of cylindrical walls of braided strands of strainer medium, are provided, the braided cylindrical walls having similarly spaced rod-receiving holes extending longitudinally in spaced fashion through the strands of strainer medium. These walls are contiguously stacked on the plates to extend between them. The plate having the central aperture permits flow of fluid drawn through the cylindrical walls during operation of the strainer. That plate has associated with it a connector to releasably secure the strainer to a mating connector on a free end of the draw line.

Abstract: A filter screen having support frame including an outer peripheral flange surrounding a central region. Faces of the outer peripheral flange of the support frame to which the wirecloth is bonded by heating are formed with a plurality of closely spaced apart parallel ridges including outer ridges and inner ridges, each having a crest, so that when heated, the crests of the ridges soften, and the woven wirecloth laid thereover and tensioned can, under an appropriate downward loading, penetrate and become embedded in the softened ridge crests. The outer ridges extend to a greater height above the frame than said inner ridges, whereby there is a greater volume of polymer to be melted and spread by the application of heat and pressure to the wire cloth near outer regions of the outer peripheral flange than near inner regions of the outer peripheral flange.

Abstract: A self-cleaning water filter, coupled to a water flow having particulates therein, that includes a pair of canisters, each having a cylindrical wedge wire water filter screen. An elongated brush running the length of the screen is disposed between two confining walls also running the length of the screen to form a chamber. A elongated partition, including two sets of apertures, is used, along with the elongated brush, to divide the chamber into two particulate dislodge chambers and a drain subchamber. A drain is in fluid communication with the drain subchamber. During cleaning, the drain is opened and the screen is rotated against the brush for liberating the particulate contaminants and a limited amount of the water flow into the two dislodge subchambers. The particulate contaminants and the limited amount of water then pass through the apertures at a high velocity and into the drain a subchamber which exits through the drain.

Abstract: A screen system used in fluid channels has individually removable bars in a bar screenfield. The removable bars are connected to the screen system through at least two screenfield bar holders. The screenfield bar holders contain a plurality of slots in which the removable bars insert within. A removably mounted screenfield bar retainer at each screenfield bar holder attaches the removable bars. The retainers have teeth that wedge the bars between them.

Abstract: An oil filter assembly has an outer canister in which full flow and bypass flow filtration sections are operatively housed in a nested relationship. Oil forced into the canister has imparted thereto a vortex flow pattern which forces contaminant particles in the oil away from the full flow filter section before the oil passes therethrough. The bypass filtration section is disposed within the full flow filtration section and creates a second vortex flow pattern in the oil which induces a small portion thereof to flow through a bypass filter element while at the same time causing the entire balance of the oil to bypass this filter element and be discharged from the canister after having traversed the filtering portion of only the full flow filtration portion of the filter assembly.

Abstract: A slotted screen assembly, in particular for treatment of fiber suspensions in the paper industry, includes at least one reinforcement element, and a plurality of rods extending in predetermined spaced-apart parallel relationship and fixed to the at least one reinforcement element. A spacer element is provided for adjusting a distance between neighboring rods upon the reinforcement element to thereby define a gap width of the slotted screen assembly, thereby maintaining a relative position between the rods at a distance which is variable. The rods and/or the spacer element form a form-fitting connection with the reinforcement, element.

Abstract: An assembly and method is provided for a screen that may be utilized for filtering purposes including filtering drilling fluid in a vibrating shaker. In a preferred embodiment, at least one screen is formed of a plurality of planar wires that are woven together with a plurality of wires, which may or may not also be planar to thereby reduce the friction forces produced by the so-constructed screen. The screen formed with planar wires may be used by itself or in conjunction with other screens to produce a screen assembly that is resistant to vibration damage. The screen formed with planar wires may also be utilized to provide improved filtration performance by itself or in combination with other screens by offering a more precise opening at the initial point of contact therefore improving the de-binding function of the screen.

Abstract: A one-piece filter cartridge is formed by inserting an open ended cylindrical screen and an end screen for the cylindrical screen in a mold and overmolding with engineered resinous material to form spaced annular and axial support ribs for the screen material. The cartridge is suitable for use in an hydraulic circuit for filtering bi-directional and radial flow without backwashing trapped particles from flow in one axial direction. One of the ribs has an annular groove for a seal ring for sealing about the cartridge upon insertion in a flow passage.

Abstract: A phase-separation member comprises a porous substrate (11) containing void spaces, a microporous polymer material (14) which at least partially impregnates the porous substrate by entering into the void spaces, and a layer of a fluoropolymer applied to the outer face of the coagulated polymer material so that the layer (16) of fluoropolymer material remains predominantly at the surface.

Abstract: This invention relates generally to filtration cassettes, and, more particularly to methods of fabricating cross-flow filtration cassettes. Cassettes of the invention are characterized, in part, by an internal porting (e.g., manifolding) feature which eliminates the need for a separate step to seal individual components prior to assembly of the filtration cassette. Filtration cassettes of the present invention can be manufactured from conventional membrane and flow screen components and can utilize both injection molding and vacuum assisted resin transfer molding fabrication processes.

Abstract: A sieve filter (1) for fluid lines or conduits which are formed of an annular disk-like fluid inlet (3) and an annular disk-like fluid outlet (4) with a fine mesh filter element arranged there between that is braced by stiffening bars (5), and which has a bypass function when the filter element (6) is stopped up or with highly viscous fluid. The fluid inlet (3) of the sieve filter (1) is constructed with the bypass function in that it has a smaller outside diameter than the fluid outlet (4) and is sealed off by a pressure relief valve (7). When the filter element (6) is stopped up or with highly viscous fluid in the line, the fluid inlet (3) is cleared by opening the pressure relief valve (7) as a bypass, through which the fluid is conducted unfiltered to the fluid outlet (4) of the sieve filter (1).

Abstract: A fine filter screen assembly comprising a length of filter screen having a relatively fine filtering surface and terminating at opposite ends with opposed end shafts. Generally open connecting means interconnect the opposed end shafts to define a continuous loop structure. At least one removable filter grid having a substantially fine filtering surface is removably mounted between the opposed end shafts such that the continuous loop structure has a substantially continuous relatively fine filtering surface. Removal of the grid allows internal access to the screen assembly.

Abstract: A filtering device for a spinning head for producing plastic threads. The spinning head has a housing in which the plastic melt flows through a filter element under pressure before exiting the spinnerets. The filter element is provided with a filtering material that is subjected to an axial contact pressure through a distributor device, according to the degree of pressure of the melt. This contact pressure acts upon the sealing edges of the filter element to close the sealing gaps. The special geometrical configuration of the filter element and/or its elasticity guarantee advantageous filtering in terms of energy. The filtering system is resistant to pressure and provides good, permanent sealing.

Abstract: A sleeve or wrap that fits over a cartridge type filter whereby enhancing the effectiveness of that filter. A preferred embodiment of the invention is to fabricate this sleeve or wrap using the category of material commonly referred to as “nonwoven” taking advantage of one or more of the functional properties possible with the composition of this material such as the ability to capture large debris, filter out chemical elements, absorb oils and many other advantages beneficial to the filtering process. This sleeve or wrap may be fabricated as a one piece tube that slides snugly over the filter. Supplied as a blanket or wrap with a thin strip of hook material along one edge similar to that used in a “Velcro tm” hook and loop fastening system and with the nonwoven material of the wrap acting as the loop so the wrap may be fit snugly over a broad range of diameter filters.

Abstract: The invention relates to a filter cloth for a filter press and to a method for producing said filter cloth. The inventive filter cloth has a filtration section through which the filtrate reaches a filter element of the filter press, and an edging section which rests against the edge of the filter element. The filtration area is provided with a cloth that differs from that of the edging section. The filtration area is woven from monofil yarns while multifil yarns are woven into the edging section.

Abstract: A filter coalescer cartridge for treating jet fuels comprising spaced apart filter/coalescer layers to effectively remove particulate contaminants and water from the transient fuel being treated.

Abstract: A twist-on renewable filter comprising a one-piece hollow housing, made of polymeric material having a threaded adapter for attachment to a distribution head assembly. The filter housing is fabricated from components that are made of a polymeric material that are fused together to form the one-piece hollow housing. A filter media assembly is rigidly bonded at both ends within the housing. The renewable filter has an infinite life and can be removed and cleaned, for example, by reverse flushing the filter with a cleaning solution. A bypass valve 250 is provided within the filter that is designed to provide full closure for an infinite life. The bypass valve 250 is fully located within the one-piece hollow housing such that it cannot be disabled or tampered with. The bypass valve 250 functions to allow sufficient fluid to bypass the filter media when the filter media has become contaminated and will not permit the full volume of the normal oil stream to be filtered.

Abstract: A method for making a screen assembly for a vibratory separator, which, in certain aspects, includes placing a first layer of screening material below a glue application apparatus, and applying with the glue apparatus an amount of glue in a pattern to a portion of the first layer of screening material, unrolling part of a second layer from a second roll and positioning the part of the second layer adjacent part of the first layer to which glue has been applied, moving the part of the second layer and the part of the first layer between opposed rotatable spaced-apart rollers to press together the part of the second layer and the part of the first layer to form a pressed-together layer of first and second layers of screening material. In certain aspects hot glue is used and is cooled following application of the second layer on the first layer.

Abstract: A laminated modular water filter includes superposed annular plates. A filter unit is disposed between each adjacent pair of the annular plates. The annular plates include a top plate, a bottom plate, a plurality of intermediate plates, and at least one flow-guiding plate sandwiched between two of the intermediate plates. Each of the top plate, the intermediate plates, and the bottom plate has an annular outer passage unit in fluid communication with a curved outer passage unit in the flow-guiding plate. Dirty water is introduced into two side openings in the top plate, and flows into central holes in the annular plates via the filter units so as to form filtered water. Solid particles in the dirty water are guided into two side openings in the bottom plate via the annular outer passage units and the curved outer passage unit.

Abstract: A disposable, biodegradable bag for purifying waste liquid flow from cement disposing, installation, and construction operations, comprising, a first porous bag element and a second porous bag element, the second bag element is operably positioned within the first porous bag element. A paper filter for filtering waste liquid flow is operably positioned between the first and the second porous bag elements, and a fastening rope or strap for securing the disposable biodegradable bag to a chute of a cement dispenser or other cement dispensing mechanism is secured to the disposable and biodegradable bag.

Abstract: A filter for Diesel engine fuel, according to the invention, which comprises a filtering mass (5) which is contained within an enclosure (2), said mass (5) being designed to be crossed by the fuel in its path inside the filter between an intake connector (3) and a discharge connector (4), said enclosure (2) comprising a water collection chamber (7) at the bottom, a micromesh (8) being further provided which is adapted to be crossed by the fuel that exits from the filtering mass (5).

Abstract: A fluid filter which comprises a canister having an open end and a closed end, the canister sealing to an adapter body to prevent leakage between the canister and the adapter body, the adapter body having a plurality of fluid inlet ports extending through the adapter assembly body into the cavity formed by the canister and the adapter body assembly, a threaded fluid outlet port extending through the adapter body, a threaded ring adapter for adapting the outlet port to a variety of connection configurations, a multistage wire mesh filter element having a weave which is designed to prevent fluid contaminants from passing through the filter element while inhibiting the contaminant particles from becoming lodged in the filter mesh, the fluid inlet ports in the adapter body being formed at an angle to create a tornado type turbine fluid motion within the canister to suspend contaminants which are blocked from passage through the screen in the fluid and allow such contaminants to settle in the canister out of the f

Abstract: An integrated fuel filter and calibration tube for a fuel injector is preferably made from a filtration element comprising filtration media insert-molded into a thermoplastic frame member; and a metal calibration tube rigidly attached to the filtration element. The calibration tube is sized so as to fit inside of a fuel injector flow channel.

Abstract: A fluid path control element which when stacked alternatively with a fluid porous sheet can be formed into a filtration module. The fluid path control element comprises a porous membrane having sealed to a portion of its periphery a thermoplastic element that extends into an opening either through the membrane or in an opening through the thermoplastic element. The portion of the thermoplastic element that extends into the opening can be heat sealed with a second thermoplastic element to prevent fluid flow between the opening and the membrane.

Abstract: A filtration system is provided for removing oil and/or hydrocarbons from blige water that collects in the blige of a marine vessel to ensure discharge of oil-free water into the surrounding waters of the vessel. The filtering medium of the system is composed of a mixture of peat, anthracite and bentonite resulting in a composition that is hydrophobic and olephilic. Due to the chemical composition of the medium, it burns efficiently and can be disposed of in the onboard incinerators of the vessel producing over 17,000 BTU's per pound. Also, the filtration system employs full backwash capability for filtering liquids combined with particulates.