Abstract: Separation media, separation modules and methods are provided for separating water from a water and hydrocarbon emulsion and include a fibrous nonwoven coalescence layer for receiving the water and hydrocarbon emulsion and coalescing the water present therein as a discontinuous phase to achieve coalesced water droplets having a size of 1 mm or greater, and a fibrous nonwoven drop retention layer downstream of the coalescence layer having a high BET surface area of at least 90 m2/g or greater sufficient to retain the size of the coalesced water droplets to allow separation thereof from the hydrocarbon.

Abstract: A water separator and particulate filter with a first or outer stage configured to coalesce water from fluid such as fuel, and a second or inner stage configured to separate coalesced water from the fluid and also remove fine solid contaminants from the fluid. The coalescing stage includes a pleated cylinder of polymeric media. The pleated cylinder has pleat valleys and downstream pleat tips, and release sites defined at the downstream pleat tips. The separator stage includes a non-pleated cylinder of polymeric media surrounding and in contact with outer pleat tips of a multi-layer pleated cylinder.

Abstract: A fuel filter, such as a filter for filtering gasoline or diesel fuel to be supplied to an internal combustion engine, includes an annular main filter element through which fluid to be filtered can pass radially, and a supplemental fluid processing element disposed within the main filter element to which fluid discharged from the main filter element passes. The filter also has end caps, between which opposite ends of both the main filter element and the supplemental fluid processing element are disposed, and to which the opposite ends of both the main filter element and the supplemental fluid processing element are secured. Fluid is discharged from a central volume of the filter through one of the end caps.

Abstract: A fuel filter of an internal combustion engine has a housing with a fuel inlet, a fuel outlet for cleaned fuel, and a water outlet for water separated from the fuel. A filter element is arranged in the housing and separates fuel inlet and fuel outlet seal-tightly. The filter element has a filter medium configured as a hollow member for filtering the fuel and further has a hydrophobic fuel-permeable separating medium embodied as a hollow member for separating water from the fuel. The separating medium is arranged in flow direction of the fuel downstream of the filter medium and is positioned inside the filter medium or surrounds the filter medium. Between the filter medium and the separating medium a precipitation slot is realized that has a conical shape and is connected with the water outlet. The separating medium extends at least across the entire extension of the filter medium.

Abstract: A filter (10) with a filter element (36) are described. A housing (12) includes at least one fuel inlet, fuel outlet (18) and a water outlet (30) for water separated from the fuel. The filter element (36) within the housing separates the fuel inlet (26) from the fuel outlet (18). The filter element (36) includes a hollow body filter medium (38) flowed through radially. A water separation unit (56) with a hollow body hydrophobic fuel-permeable separating medium (66) separates water contained in the fuel and includes at least one support structure disposed in the flow path (78) in such a way that a precipitation gap (74) is realized between the filter medium (38) and the separating medium (66). The precipitation gap (74) is connected with the water outlet (30).

Abstract: One embodiment is a filter element including an outer filter media and an inner filter media. The outer filter media is operable to remove particulates present in a flow of fluid and/or coalesce water contained in the flow of fluid. The inner filter media is operable to remove particulates from the flow of fluid, separate water form the flow of fluid, and remove particulates from the flow of fluid. Other embodiments include unique apparatus, devices, systems, and methods relating to fuel filters and filtration. Further embodiments, forms, objects, features, advantages, aspects, and benefits of the present application shall become apparent from the detailed description and figures included herewith.

Abstract: A filter element for positioning in a filter compartment of a spa includes a plastic mesh outer cylinder and a plastic mesh inner cylinder, the inner cylinder being positioned coaxially with respect to the outer cylinder to define an annular interior chamber with a filter element of annular cross-section disposed in the chamber and having keyed landings formed on the top and bottom thereof, which respectively mate and interlock with one or more keyed landings on top and bottom caps of the filter element. The apparatus may further include a plurality of vertically disposed mesh compartments interlinked in a ring and disposed within the filter element, the compartments being filled with a selected filter medium or filter media.

Abstract: A filter arrangement includes a filter cartridge having a first filter element and a second filter element. The first filter element includes a first tubular section of filter media extending between first and second end caps and defining a first open filter interior. The second filter element includes a second tubular section of filter media operably oriented in the first open filter interior. The second tubular section of filter media extends between third and fourth end caps and defines a second open filter interior. The first end cap defines an inner container and an outer container circumscribing the inner container. The outer container is secured to the first tubular section of filter media. The inner container has an end wall axially spaced from the outer container. The third end cap has a media end secured to the second tubular section of filter media and a tubular wall axially extending from the media end. The tubular wall is circumscribed by the inner container of the first end cap.

Abstract: A filter assembly includes an outer filter assembly, the outer filter assembly including an outer filter layer of pleated polyester fabric arranged in a hollow cylindrical shape and first and second end caps for retaining the ends of the outer filter layer, and an inner filter assembly including a hollow cylindrical core having a side wall with a plurality of perforations defined therein, an inner filter layer of meltblown polypropylene disposed around an outer surface of the side wall of the hollow cylindrical core, and first and second end caps. The inner filter assembly is removably received within the outer filter assembly such that the hollow cylindrical core and inner filter layer extend within the hollow cylindrical shape defined by the outer filter layer. The filter assembly is adapted to be mounted in a horizontal orientation within a filtering chamber of a spa device.

Abstract: A fluid purifying module including a monolithic container, a pretreatment filter, and a selectively permeable membrane treatment cartridge, respectively housed in an external cylindrical space and an internal cylindrical space of the container, communicating with each other via one or more passages in the vicinity of one axial end of the container. The external space communicates at the same end as the opposite axial end with a first connector orifice for feeding fluid to be purified to the pretreatment filter, and the internal space communicates separately, at the same end as the aforementioned axial end, with a second connector orifice for evacuating from the module a flow of permeate (purified fluid) and with a third connector orifice for evacuating from the module a flow of retentate (residual fluid).

Abstract: Disclosed is a separation media, comprising an upstream layer, comprising fibers, wherein the upstream layer has a mean flow pore size of 8 microns or less; and a downstream layer, comprising fibers. The separation media is designed to separate red blood cells from liquid specimens such as blood and allow a filtrate, such as blood plasma, to flow from said downstream layer. Also provided is a diagnostic test device incorporating the separation media. Further disclosed is a method for separating red blood cells from a liquid specimen.

Abstract: A filter element for a pool or spa including a sintered plastic outer cylinder of a first diameter, a sintered plastic inner cylinder of a second diameter less than said first diameter; the inner cylinder being position coaxially with respect to the outer cylinder to define an annular interior chamber; and a selected granulated filter medium or combination of media residing in the annular interior chamber.

Abstract: A system of water collecting, cleaning, and storing comprises a top-opened water storing container (1), with the wall of which a watertight structure; a collecting well (2) provided in the water storing container (1), which has a lid (6) and has a wall of permeable structure through which water exchange between the water storing container (1) and the collecting well (2) is achieved; filling elements (4) filled between the collecting well (2) and the water storing container (1), on top of which a pervious surface layer (5) is paved.

Abstract: A filter cartridge, which is suitable in particular for purifying dental waste waters, has a housing with three different spatial regions which receive three different filter materials having different filter properties. The first filter material is preceded by a sedimentation space.

Abstract: A filter within a filter cartridge design is described that includes a sealing structure on an endplate of an outer filter element. Generally, the sealing structure includes an annular flange on the endplate that can directly seal against an interior surface of a housing when the filter cartridge is assembled for use. During filtration, the annular flange prevents a working fluid from bypassing the outer filter element. The sealing flange can seal with the housing in a press fit engagement.

Abstract: A filtering system having a housing forming a cavity with a fluid inlet and outlet remote therefrom with a partially porous basket filled with particulate or granular polymer filtering material and the basket surrounded by a bag filter. The housing inlet receives effluent from a strainer. The particulate may be filled in a monofilament polyethylene woven mesh sleeve in the form of a removable cartridge. A pump supplied fluid to be filtered through the strainer and filter housing. The system may be mounted on a wheeled cart for portability; and, in one exemplary version, includes a wastewater reservoir connected to the strainer inlet.

Abstract: A filter cartridge includes a one-piece housing having a port and a filtration element disposed in the housing. The filtration element is a coherent filter block that can be larger in cross dimension than the port. The filtration element can be a coherent filter block that generally conforms to the shape of the hollow interior, but is slightly smaller than the hollow interior so as to define a gap between the filtration element and the inner surface. One method for constructing a filter cartridge includes providing a housing having a hollow interior and at least one port, introducing a granular material into the hollow interior via the port, and transforming the granular material in the hollow material into a coherent filter block. Another method for constructing a filter cartridge includes providing a filtration element in the form of a coherent filter block, and overmolding a housing around the filtration element.

Abstract: The cylindrical or conical shaped particle separator operates based on cyclone-induced flow sweeping the face of the cylindrical separator screen, creating inertial separation of suspended particles. The separator screen comprises of multitude of parallel, evenly spaced, asymmetrically profiled, linear, screen elements arranged in a cylindrical or conical grid-like shape parallel with the axis of the cylinder or cone. The cyclone effect is created by the rotational, helical path of the fluid inside or outside of the cylindrical or conical separator screen. The spinning, rotating fluid sweeps the inner or outer side of the stationary or rotating screen, passing approximately perpendicularly over the linear grid-like elements and gaps between the elements. The screen elements may be wires, bars, narrow strips, airfoil vanes or other similar linear elements with a flow separation edge on the trailing end of the profile of the element.

Abstract: The invention relates to a filtering apparatus in which improvement of maintenance of a driving system, reduction of the number of components, and ease of assembly are achieved.

Abstract: A filter device includes a filtering member having a rough part, which is comparatively low in a density of flow pores for flowing fluid, and a dense part, which is comparatively high in the density of the flow pores. The filter device further includes a support member that supports the filtering member and has an inflow passage and a discharge passage. The dense part supports the rough part, and is located between the rough part and the discharge passage, and is supported by a mechanical pressure applied by the support members. The filter device is capable of supporting the filtering member easily in a case member and securing a filtering area to enhance the performance of removing a foreign matter.

Abstract: Cross flow filter device comprising a longitudinal first filter element (1) having a first width (w1) and a longitudinal central axis (8), a longitudinal second filter element (2) having a second width (w2) and being longitudinally installed substantially concentrically inside said first filter element (1), a housing (3) surrounding said first filter element (1), said cross flow filter device having respectively a raw material inlet (4), a concentrate outlet (5), and a first filtrate outlet (6) connected to said first filter element (1). The ratio between the second width (w2) and the first width (w1) is 65%, preferably at least 70% and more preferably about 75%.

Abstract: A liquid filter assembly including a first liquid filter; a second different liquid filter element; a housing and a relief valve. The liquid filter assembly forms a first liquid flow path having the first liquid filter element therein, and a second liquid flow path having the second liquid filter element therein. The first liquid filter element forms a mixing chamber in a center of the first liquid filter element for mixing the liquid filtered by the first liquid filter element and the liquid filtered by the second liquid filter element. The relief valve is configured to allow liquid to bypass the second liquid flow path to mix with liquid filtered by the first liquid filter element in the mixing chamber.

Abstract: A filter unit includes an outer filter assembly, a bypass valve assembly, and an inner filter assembly. The bypass valve assembly can be separated from the outer filter assembly, allowing the bypass valve assembly to be recycled/reused when the outer filter assembly is disposed of. In addition, the bypass valve assembly and the inner filter assembly can be connected together, then inserted into the outer filter assembly.

Abstract: An improved construction of filtration media of a wedge filter provides a performance on both surface and inner filtration mechanisms with offering many times recycled use by washable functions. Particularly a wedge filter plate is used to construct a hollow cylindrical type media of wedge filter.

Abstract: A filter medium for strainers used in the emergency sump of a nuclear power plant ECCS. The filter medium is employed with double wall, concentric tube type strainer modules. The filter medium is preferably constructed of a woven or knitted stainless steel wire material and is shaped in a cylinder so that it can be inserted between two concentric strainer walls, concentric tube type strainer in such a manner that water that passes through the strainer must pass through and be filtered by the filter medium before the water can be pumped to the reactor core. The filter medium is inserted through the bottom of the strainer module and is held in place by an x-shaped retainer. The filter creates varied approach velocity of the fluid and results in non-uniform fibrous debris accumulation on the strainer, insuring acceptable strainer debris hydraulic head loss.

Abstract: A filter medium for strainers used in the emergency sump of a nuclear power plant ECCS. The filter medium is employed with double wall, concentric tube type strainer modules. The filter medium is preferably constructed of a woven or knitted stainless steel wire material and is shaped in a cylinder so that it can be inserted between two concentric strainer walls, concentric tube type strainer in such a manner that water that passes through the strainer must pass through and be filtered by the filter medium before the water can be pumped to the reactor core. The filter medium is inserted through the bottom of the strainer module and is held in place by an x-shaped retainer. The filter creates varied approach velocity of the fluid and results in non-uniform fibrous debris accumulation on the strainer, insuring acceptable strainer debris hydraulic head loss.

Abstract: A filter cartridge that is designed to accommodate differences in lengths between an outer filter media and an inner filter media by providing a flexible connection between the inner filter media and the outer filter media. In addition, the endplates of the inner filter and the outer filter together define a gasket groove that receives a gasket. Using the endplates of the inner and outer filter media to define the gasket groove eliminates a mold parting line that can lead to fluid leakage.

Abstract: A filter element includes a cylindrical housing enclosing a ring-shaped filter media assembly. The media assembly includes inner and outer media rings, moveably supported relative to one another, to remove particulate matter and water from a fluid stream. The outer ring surrounds the inner ring and is sealed by a first seal to the housing. An end cap assembly at the upper end of the element includes an annular end cap piece attached to an upper end of the inner ring, a flat plate, and a threaded flange portion bounding the periphery of the plate. A second seal is provided between the upper end cap of the inner ring, and an upper end cap of the outer ring. The housing is secured to the media assembly by forming an open end of the housing around the flange portion.

Abstract: A lubricant reclamation system having a reclamation device (100) is sectioned into three processing sections: a centralized core section (150), a peripheral filtering section (170), and a base filtering section (190). A series of peripheral conduits (172, 182) are disposed within the peripheral filtering section (170) having an entrance port (174) in communication with an inlet manifold (105) and discharging via an exit port (176) in communication with the base filter (190), a peripheral filtering material (178), or the core filtering section (150). The peripheral conduits (172, 182) can be linear, multi-directional, tapering, and spiraling. The filter is in fluid communication with a series of stacked reclamation members (130, 140). The stacked reclamation members (130, 140) provide processing and/or monitoring of the lubricant via electrical or pneumatic interface.

Abstract: A filter includes filter media and a housing surrounding the media. The housing has an outlet and is sealed such that all fluid flow out of the outlet must first enter the cartridge and pass through the media. The housing has multiple inlet flow paths configured so that fluid impinging on the housing is diffused as it enters the cartridge and is prevented from flowing directly towards the filter media.

Abstract: Disclosed are modular filter-in-filter elements, namely an outer filter element and an inner filter element which may be assembled to form a filter cartridge for use in separation methods and systems. The outer filter element typically functions as a coalescing element and the inner element typically functions as a particulate filter element. The disclosed filter cartridges may be structured for separating water from a hydrocarbon-based liquid fuel as the fuel moves through the cartridge from outside to inside.

Abstract: A fuel filter system, particularly a diesel filter, including a housing, a particle filter arranged in the housing, and a coalescer element mounted on the particle filter. Fuel passes successively through the serially connected coalescer and particle filter. The coalescer element improves the separation of any water contained in the fuel to be filtered, while exhibiting no or no significant fuel-filtering properties.

Abstract: A filter cartridge configured as a filter-in-filter design with an inner filter and an outer filter. The filter cartridge has features, for example an overhanging lip, to engage with a lid of a filter housing in which the cartridge is installed such that the lid is connected to the cartridge. As a result, the cartridge can be connected to the lid to facilitate installation and removal of the cartridge. Alternatively, the same features that allow connection with the lid permit a user to manually grasp the cartridge during installation and removal so that the cartridge can be used without a lid having attachment features. The filter cartridge is also designed to enable use of a longer inner filter within the outer filter. A longer inner filter increases the amount of filter media available for filtering the fluid.

Abstract: A fluid filter (1) comprises a housing (3) provided with a fluid inlet (11) and a fluid outlet (19), filter means (45) being mounted in the house (3) between the fluid inlet (11) and the fluid outlet (19) to filter fluid flowing through the housing (3). Actuation means (43) is provided to move the filter means (45), in use, within the housing (3) to dislodge particles of filtered material from the filter means (45) so as to clean the filter means (45). A filter assembly comprising a plurality of such filters is also provided.

Abstract: In accordance with the present invention, there is provided an increased efficiency strainer system which is particularly suited for use in the emergency core cooling system of a nuclear power plant. In certain embodiments of the present invention, the strainer system includes one or more strainer cassettes or cartridges, with each such cassette or cartridge including a plurality of strainer pockets disposed in side-by-side relation to each other. In these embodiments, multiple cassettes or cartridges may be assembled together to form a strainer module of the strainer system. The strainer pockets of the cartridge each define an inflow end. Within the cartridge, or the module including multiple cartridges, the inflow ends of one or more of the strainer pockets may be enclosed by an elastic metal membrane. When in a closed position, the membrane prevents liquid flow into the corresponding strainer pocket via the inflow end thereof.

Abstract: A fluid filter providing several degrees of filtering is designed to be receivable in a filter container that is closable by a cover. The filter itself includes both an annular main filter element, through which fluid to be filtered can pass radially to undergo primary filtration, and a supplemental filter element, to which fluid discharged from the main filter element passes to provide supplemental filtration additional to the primary filtration. The main filter element, the supplemental filter element, or both may be oblong or circular in cross section. At least one of a pair of end caps disposed on opposed ends of the main filter element carries the supplemental filter element as well as one end of the main filter element. That end cap may or may not be permanently secured to the one filter element end.

Abstract: One embodiment is a filter element including an outer filter media and an inner filter media. The outer filter media is operable to remove particulates present in a flow of fluid and/or coalesce water contained in the flow of fluid. The inner filter media is operable to remove particulates from the flow of fluid, separate water form the flow of fluid, and remove particulates from the flow of fluid. Other embodiments include unique apparatus, devices, systems, and methods relating to fuel filters and filtration. Further embodiments, forms, objects, features, advantages, aspects, and benefits of the present application shall become apparent from the detailed description and figures included herewith.

Abstract: A filter cartridge for use in filtering fluids, for example fuel, lubrication, hydraulic and other liquids, as well as air. The filter cartridge is a filter-in-filter design with an inner filter and an outer filter. The inner filter and the outer filter, for example the bottom end plates thereof, are connected to each other via a snap fit connection mechanism. During manufacture, the inner filter can be inserted into the outer filter, with the snap fit connection mechanism retaining the inner filter in the outer filter.

Abstract: The present invention describes a fuel filter assembly useful in the purification of fuels such as diesel, gasoline, jet fuel, kerosene, heating oil and similar liquids. The fuel filter assembled herein described separates solids and semisolids particulates such as algae, microbial growth, fungi and the like from fuel, providing a much cleaner fuel to secondary fuel system, engine and fuel consuming devices. The said fuel filtering assembly comprises a removable lid mounted at the top of an upright vertical housing, a non-disposable removable filter unit enclosed in the internal cavity of the said housing and a multi-purpose base comprising fuel inlet and fuel outlet as internal passages within the said base.

Abstract: A filter element includes outer and inner sleeves made from a flexible, pervious material. The inner sleeve, which is arranged substantially concentric with respect to the outer sleeve, employs one or more handles to facilitate the removal of the filter element from an associated filter housing.

Abstract: The invention relates to a fuel filter through which the fuel is to flow, in which water-separating, permeable layers are arranged spaced apart from one another in the direction of flow upstream of the filter layer, each time during operation of the filter the free space that lies between the two layers is connected to a first water collecting space, lying on the bottom of the filter, the first water collecting space lies below both the filter layer and the two permeable layers, is intended to permit a high degree of water separation. For this purpose, such a fuel filter is distinguished by the fact that the filter tube space lying upstream of the layer that is flowed through first of the two layers is connected to a second water collecting space within the filter, the assignment of which to the filter layer on the one hand and to the two permeable layers on the other hand coincides with that of the first water collecting space with respect to these components.

Abstract: A pre-filter assembly is for use in a skimmer of a residential swimming pool. The pre-filter comprises a skimmer collar and a cleanable filter basket. The skimmer collar is for placement on a rim of a below water surface opening within the skimmer. The cleanable filter basket is made of a water porous material. The filter basket is permanently secured at an edge defining the open-top to the skimmer collar. The filter basket further has a chevron shape for ease of use. Swimming water debris is trapped in the filter basket as pool water is pulled through the filter basket on its way to a primary filter apparatus. The filter basket is easily cleaned as needed and replaced.

Abstract: Embodiments of the invention provide a membrane module including a first plurality of fibers capable of filtering fluids that are helically wound in layers creating a mono helix. Fluids to be treated can flow radially with respect to a longitudinal axis of the mono helix or parallel to the longitudinal axis of the mono helix. The membrane module can further include a second plurality of fibers that are helically wound with the first plurality of fibers to create a dual helix. The second plurality of fibers can have different properties than the first plurality of fibers in order to achieve different filtering functionalities.

Abstract: Solid phase extraction (SPE) disks may be manufactured by providing a suspension comprising glass microfibers and a suspension comprising one or more sorbents and forming a disk by combining the suspensions or by layering the suspensions. This may be followed by a drying procedure to create the finished disk. A disk mold including a collar and plug may be used to establish the size and shape of the disk. Examples of various constructions and processes for forming the disks are provided.

Abstract: A filter cartridge in a filter-in-filter design with an inner filter and an outer filter. A mechanism, for example crush ribs, connects an upper end plate of the outer filter and an upper end plate of the inner filter to prevent relative axial and radial movement therebetween when assembled. Relative axial or radial motion can create a rattling noise which is sometimes perceived as a low quality filter. The crush ribs are, for example, formed on an interior surface of the upper end plate of the outer filter, and the ribs engage an outer perimeter of the upper end plate of the inner filter. One or more of the ribs crush when the inner filter is installed into the outer filter to ensure tight axial and radial engagement between the filters.

Abstract: A water purifier for the purification of pressurized water includes a filter chamber (16) with a cylindrical adsorption filter (17), a UV chamber (19) that is provided inside the adsorption filter (17), an incoming water intake (15) to the filter chamber (16), a spout (20) emanating from the filter chamber (16) for the discharge of water from the filter chamber (16), a space (11) laterally displaced relative to the filter chamber (16), components for the control of the function of the water purifier being received in the space (11), an upper demountable part (3) and a lower demountable part (5). The connection of the incoming water is made to a central main portion (1) of the water purifier, that the discharge of the purified water is effected from the central main portion (1), and that the central main portion (1) is located between the demountable parts (3, 5).

Abstract: A combination filter (1) for diesel fuel, comprising an outer casing (2), a filter cartridge (5) dividing the interior of the casing (2) into two separate chambers (6, 7) to which an inlet conduit (3) for the diesel fuel to be filtered and an outlet conduit (4) for the filtered diesel oil are connected respectively, said cartridge (5) having a filtering capacity for the diesel fuel which is at least equal to that required by the specific application, said cartridge (5) comprising at least two filtering baffles (50, 51) associated with each other in such a manner as to be traversed in series by the diesel fuel to be filtered, that filtering baffle (50) more upstream with respect to the direction in which the diesel fuel traverses having a filtering capacity less than that required by the specific application but such as to retain the solid phase component of the diesel fuel which forms at the paraffin formation temperature.

Abstract: The present disclosure is directed to a capsule configured to direct fuel flow within a fuel filter assembly housing. The capsule has a tubular element configured to define a flow path between the capsule and a fuel filter assembly housing. The tubular element defines an interior chamber, a proximal end, and a distal end defining a manifold. The tubular element is configured to be removably received by the fuel filter assembly housing. The interior chamber is configured to receive a fuel filter element. The capsule is configured to direct fuel flow from the proximal end of the capsule, around the tubular element, to a point beyond the distal end of the capsule, and to receive fuel flow from the point beyond the distal end of the capsule and direct the fuel flow via the manifold to the filter element, thereby providing at least two passes of the fuel flow through filter elements within the fuel filter assembly housing.

Abstract: An apparatus, system, and method are disclosed for multistage water separation. A first separation layer separates water droplets from a fuel flow by repelling the first water droplets. A coalescing layer may coalesce fine water droplets in the fuel flow. In one embodiment, a centrifugal separator directs the fuel flow tangentially to a filter wall and the centrifugal force of the fuel flow directed tangentially along the filter wall biases water droplets from the fuel flow. A second separation layer separates second water droplets from the fuel flow.

Abstract: Devices for separating impurities from the lubricating oil of an internal combustion engine, the devices at least having a filter element and a housing provided with a screw cap. The screw cap and the filter element include a detachable connection arrangement which can be brought into contact and are used to transmit axial tractive forces. A first device is characterized in that the connection arrangement can be brought into contact by rotating the screw cap in the loosening rotational direction thereof and can be disengaged by rotating the screw cap in the tightening rotational direction thereof. A second device also includes a centrifuge located in the same housing, a first connection apparatus, corresponding to the above-mentioned connection apparatus being provided between an intermediate cap and the filter element, and a second connection apparatus being provided between the screw cap and the intermediate cap.