Abstract: A filter assembly is disclosed having a filter base including an inlet and an outlet. The filter assembly also has a first valve disposed in the inlet, the first valve including a portion that protrudes from the filter base. The filter assembly additionally has a second valve disposed in the outlet, the second valve including a portion that protrudes from the filter base. The filter assembly also has a removably attachable filter configured to mechanically bias the first and second valves in an open position.

Abstract: A filter cartridge has a keyed end cap which is configured and shaped for unlocking an associated valve mechanism that comprises a latch device and a valve. In this manner, when the fuel filter cartridge is placed into a fuel filter housing having such a latch and valve mechanism, the fuel filter cartridge is operable therein to filter fluid and pass the fluid into a standpipe contained within the fuel filter housing. The fuel filter cartridge of this type generally includes pleated filter paper which is disposed between two opposed end caps. The keys may be provided along the bottom end cap.

Abstract: A time and labor saving device used in the aviation refueling process for holding an aviation style fuel nozzle in place over a open vessel with a support base so that the filter screen may be easily inspected while additionally providing for the collection and recycling of fuel that is lost while inspection is made.

Abstract: A filter and filter element is provided that incorporates a valve member for preventing priming fluid from contaminating a clean fluid side of the filter or filter element. The filter may incorporate a replaceable filter element or be replaceable itself. The valve member is preferably formed as an annular flange of a grommet mounted to an end cap of the filter element. The annular flange sealingly engages with the end cap and closes a clean fluid outlet port in a relaxed state and opens the clean fluid outlet port in a deformed state.

Abstract: A filter assembly for filtering water from an external source, the filter assembly having a manifold assembly and a filter cartridge. The filter cartridge includes a cartridge engagement means while the manifold includes a manifold engagement means. The cartridge engagement means and manifold engagement means cooperatively interfacing for removable attachment of the filter cartridge to the manifold assembly. The cartridge engagement means and manifold engagement means oriented in a retaining relation during removal of the cartridge filter from the manifold assembly such that any entrained pressure within the cartridge filter is vented while the cartridge engagement means and manifold engagement means are in the retaining relation.

Abstract: A brine filtering device, applicable to a meat product injection machine, including a pre-filtering unit with two pre-filtration drums arranged to rotate coaxially about a horizontal axis and a safety filtering unit with at least one safety filter sleeve submerged in a tank and connected to an outlet. An inlet hopper receives brine to be filtered and forces it into the first pre-filtration drum through an upper region of its filtering wall. The brine which exits a lower region of the first pre-filtration drum is collected in a tub, then it enters into the second pre-filtration drum through a lower region of its filtering wall, and next it is poured into tank through an open side wall of the second pre-filtration drum.

Abstract: The application is directed to an extracorporeal blood processing system capable of using dialysate to prime the system. A plastic molded compact manifold supports molded blood and dialysate fluidic pathways along with relevant sensors, valves and pumps. The compact manifold is also disposable in one embodiment and can be detachably installed in the dialysis machine. A two-way valve in the manifold is used to direct the dialysate flow through the blood circuit to prime the circuit for use in treatment.

Abstract: A vessel system comprising a vessel is presented. The vessel system comprises at least one internal wall located within the vessel. The vessel system further comprises at least one inflatable seal to create a seal between an outer periphery of the internal wall and an internal cavity wall of the vessel. The vessel system further comprises a shaft longitudinally traversing the vessel and adapted to transmit a force applied on the at least one internal wall to an end of the vessel.

Abstract: A liquid filter suitable for motor vehicles which includes a filter head (11), a vessel (12) and a filter element (16) disposed within the vessel (12) sealingly separating an inlet (14) from an outlet (15) such that liquid from the inlet must flow through the filter element to reach the outlet. The filter element (16) has guide projections (27, 28) positioning the filter element (16) within the vessel (12). Prior to installation, the filter element (16) is preassembled into the vessel (12) and fixed in position by pushing the filter element (16) into an element guide (29), after which the preassembly is screwed onto the filter head (11). When the vessel (12) is unscrewed from the filter head (11), the filter element (16) slides out of the element guide (29) and moves axially upwardly to free a volume V. Liquid flowing into the vessel (12) from the higher regions of the liquid filter (10) can flow into this volume, thus enabling drip-free replacement of the filter element.

Abstract: A filter element is removably positionable within a filter housing defining a filter chamber for said filter element. The filter housing comprises a standpipe extending within the filter chamber. The filter element includes a tubular filter media circumscribing the standpipe, a first end cap supporting the filter media at one end thereof, a second end cap longitudinally spaced from the first end cap and supporting the filter media at the opposite end thereof, and a center tube extending between the first and second end caps. The center tube has at least one inlet opening therethrough, a bypass opening at a first end thereof adjacent to the first end cap and a standpipe opening at a second end thereof adjacent to the second end cap and through which the standpipe is adapted to be inserted longitudinally into the center tube.

Abstract: An oil filter arrangement, has a housing (12) with a receiving space (18) for a filter element (20) which can be inserted into the housing and through which oil can flow radially, with an oil inlet (34) and an oil outlet (32), and with a supporting tube (22) which is present in the receiving space and supports the filter element. The supporting tube is inserted into the receiving space and is fastened to the housing in such a manner that it remains in the housing when the filter element is exchanged.

Abstract: A filter and filter element is provided that incorporates a valve member for preventing priming fluid from contaminating a clean fluid side of the filter or filter element. The filter may incorporate a replaceable filter element or be replaceable itself. The valve member is preferably formed as an annular flange of a grommet mounted to an end cap of the filter element. The annular flange sealingly engages with the end cap and closes a clean fluid outlet port in a relaxed state and opens the clean fluid outlet port in a deformed state.

Abstract: The invention relates to a liquid separator, particularly an oil separator for compressed air systems. The liquid separator comprises a housing (15), which can be detachably connected by means of a bayonet-type connector (11) to a counterpart (12). The housing (15) is locked onto the counterpart (12) by axial tensioning forces (F) operable to lock the bayonet connector (11).

Abstract: A water filter assembly including a water filter housing and a manifold coupled to the water filter housing. The manifold includes an inlet and an outlet. Filters are disposed in the water filter housing. The water filter assembly has a door. The door is disposed on the water filter housing providing selective access to the water filter housing. The door is connected to the water filter housing to open and close to replace the plurality of filters. The water filter assembly also has a valve associated with at least one of the plurality of filters. The valve is manipulated from an opened to a closed position to close the inlet when the filters are removed from the water filter housing.

Abstract: The invention relates to a device for filtering of oil circulating in an internal combustion engine, comprising an oil filter adapter for detachable fastening of an exchangeable oil filter to the engine block of the internal combustion engine. The invention is characterized in that the oil filter adapter has a receptacle with an inserted pin, the receptacle having an outflow for returning the oil flowing from the exchangeable oil filter, the receptacle having a channel which leads in particular to an oil pump, and the receptacle having a drain which leads in particular to the cylinder crankcase, the pin being inserted elastically pretensioned such that during operation the pin clears the outflow and closes the channel and the drain, and, when the exchangeable oil filter is loosened from the oil filter adapter, the pin is displaced by spring force and clears the outflow, the channel, and the drain. Furthermore the invention includes a pin which is designed for use in the device according to the invention.

Abstract: The filter may include a first end cap, a second end cap, and a filter media. The filter media may be located between the first end cap and the second end cap. The filter media and the end caps may be located in a shell. An insert including a projection may be connected to the shell. The projection may engage a valve in the filter head when the filter is mounted onto a filter head. The projection may include a curved portion. The curved portion may engage a ball in the valve. The filter media may be a coalescing media which may assist in separating water from a fuel and water mixture.

Abstract: An extracorporeal blood processing system comprises a plastic molded compact manifold that supports a plurality of molded blood and dialysate fluidic pathways along with a plurality of relevant sensors, valves and pumps. A disposable dialyzer is connected to the molded manifold to complete the blood circuit of the system. The compact manifold is also disposable in one embodiment and can be detachably installed in the dialysis machine. Two-way valves in the manifold are used to direct the dialysate flow to the dialyzer in hemodialysis mode of operation and to bypass the dialyzer to direct the flow of infusion grade dialysate directly to the patient in hemofiltration mode of operation.

Abstract: A filter cartridge includes a filter media defining an interior space, and having a first end and a second end, a first end plate connected to the first end, and a second end plate connected to the second end. A pin is connected to the second end plate and extends downwardly into the interior space. The pin defines a flow passage threrethrough that communicates the interior space with an outside of the filter cartridge.

Abstract: A water-cleaner includes a bowl, a tank, a tube, a filtering unit, at least one sleeve, a cover, an exhaust unit and a valve. The tank includes an aperture defined in a lower portion. The tank is located on the bowl. The tube includes apertures transversely defined therein. The tube is inserted in the tank. The filtering unit includes filtering bags stacked on one another and located around the tube. Each of the filtering unit includes an exit in communication with related ones of the apertures of the tube. The sleeve is located around the tank and movable between first and second positions. In the first position, the sleeve and the tank together define a space for containing raw water. The cover is located on the sleeve. The exhaust unit is arranged between the sleeve and the cover. The valve is located in the aperture of the tank.

Abstract: The invention relates to a filter device having at least one filter element (11) comprising a filter medium (27) disposed between two receiving parts (31, 35) and a connecting device located at the lower receiving part (35) for a fluid connection to a fluid device, in particular to a fluid tank (1), having a connecting part (45) disposed on the connecting device, said connecting part being pretensioned by the action of a first energy store (43) for a motion away from the upper receiving part (31) into a closed position blocking the connecting device, having a further, second energy store (49) for generating a relative motion between the lower receiving part (35) and a closing-off part (17) of the device, and having a sealing device (55) sealing between the lower receiving part (35) and the closing-off part (17) as soon as said part and the lower receiving part (35) make contact with each other under the influence of the second energy store (49).

Abstract: A filter cartridge and spool valve manifold assembly includes a filter cartridge and a spool valve manifold. The filter cartridge includes a filter element and inlet/outlet portion in fluid communication with the filter element. The inlet/outlet portion has a cartridge inlet port and a cartridge outlet port. The spool valve manifold includes a housing and a body. The housing has a housing inlet port and a housing outlet port adapted for fluid communication with a fluid supply system. The body is located within the housing and configured to rotate around a first axis relative to the housing. The inlet/outlet portion of the filter cartridge is fluidly coupled to the body via insertion of the inlet/outlet portion into the body in a direction perpendicular to the first axis.

Abstract: A fluid filtration system is disclosed comprising a manifold assembly comprising a mounting bracket, an alignment collar connected to the mounting bracket, and a latch assembly moveable with respect to the mounting bracket and alignment collar. The system further comprises a filter cartridge comprising a filter cartridge outer surface and a cartridge latching structure formed on the filter cartridge outer surface to interact with the latch assembly. When the filter cartridge is aligned with the alignment collar and inserted into the manifold assembly, the filter cartridge is (i) latched into the manifold assembly by translating the filter cartridge into the manifold assembly to cause movement of the latch assembly to engage the cartridge latching structure; and (ii) unlatched from the manifold assembly by translating the filter cartridge into the manifold assembly to cause movement of the rotating latch assembly to disengage the cartridge latching structure.

Abstract: The present disclosure relates to a new fluid filter system including, but not limited to, structure for enabling a filter cartridge to be installed and removed from a manifold with a straight line push/pull motion, an innovative latching mechanism and an innovative water manifold, the latching mechanism providing a unique mechanism interface between an innovative manifold and a filter cartridge, the latching mechanism providing a compact and simple mechanism between the innovative manifold and the filter cartridge that significantly reduces the installation and removal force previously found with fluid filtration cartridges by including a low force filter cartridge installation and removal mechanism for utilization by the end consumer and the manifold assembly includes an inlet and an outlet port, the manifold assembly having structure for maintaining a substantially constant volumetric cavity of the fluid filtration system that contains fluid during installation and operation of the filter therein and remov

Abstract: A filter element is removably positionable within a filter housing defining a filter chamber for said filter element. The filter housing comprises a standpipe extending within the filter chamber. The filter element includes a tubular filter media circumscribing the standpipe, a first end cap supporting the filter media at one end thereof, a second end cap longitudinally spaced from the first end cap and supporting the filter media at the opposite end thereof, and a center tube extending between the first and second end caps. The center tube has at least one inlet opening therethrough at a first end thereof adjacent to the first end cap and a standpipe opening therethrough at a second end thereof adjacent to the second end cap. The second end cap has at least one intake opening therethrough radially spaced from the standpipe opening in the center tube.

Abstract: A chemical release system. Implementations may utilize implementations of a first cartridge that include a body coupled with a cartridge head at a first end and coupled with an end plug at a second end where the cartridge head includes a through hole configured to engage with an annular flange in a main head. The body may have an internal cross section. The first cartridge may also include a flow restrictor plate disposed within the body between the first end and the second end where the flow restrictor plate is oriented substantially parallel to the cartridge head within the body, includes only one opening therethrough, and substantially conforms with the internal cross section of the body. The body may include one or more through holes in a side of the body located between the flow restrictor plate and the cartridge head.

Abstract: A fluid filtering apparatus and method may include keyed components to ensure that a correct filter element is being installed into a filter base. Keyed arrangements may occur between a filter element and a filter housing, a filter and a filter base, and a filter base and a filter housing. A locking arrangement may be provided to prevent undesired loosening of a filter relative to a filter base. The filter base may include a torsion lock insert that engages lock detents of a filter to prevent the undesired loosening. An adaptor may be provided to provide the lock detents that interact with a torsion lock insert.

Abstract: A liquid filter heat exchanger unit has a heat exchanger having an inlet through which a liquid is supplied to the heat exchanger and a drain through which the liquid exits after having passed through the heat exchanger. The unit also has a liquid filter with a filter housing and a filter element exchangeably arranged in a receiving chamber, wherein the liquid is supplied through the drain of the heat exchanger to an unfiltered side of the filter element. A bypass connects an inlet passage for supplying the liquid to be filtered to the receiving chamber in the filter housing. A switching member opens and closes the bypass. The switching member is formed by the filter element such that the bypass is closed when the filter element is inserted in the filter housing and is opened when the filter element is removed from the filter housing.

Abstract: An apparatus for diverting rainwater includes a body having a top portion, a bottom portion, and a central portion. A diverter is disposed within the central portion, and has a lower portion and an upper portion. The lower portion of the diverter, together with one or more walls of the body, defines a containment configured to capture rainwater that enters through the top portion. An opening in at least one of the walls of the body is configured to divert rainwater from the containment. The body also includes a bypass flow area extending through the central portion adjacent to, and separate from, the containment, where the bypass flow area has a cross-sectional area that is substantially equal to or greater than a cross sectional area of the top and bottom portions.

Abstract: The invention relates to a liquid separator, particularly an oil separator for compressed air systems. The liquid separator comprises a housing (15), which can be detachably connected by means of a bayonet-type connector (11) to a counterpart (12).

Abstract: A liquid filter arrangement is provided, as well as methods of assembly and use. Advantageous features, relating to a preferred filter cartridge and a preferred slide arrangement, are provided.

Abstract: A valve assembly that is useable with a fuel filter housing to control the flow of fuel through the fuel filter housing. The valve assembly comprises two primary parts that are connected together via a snap connection, and when the valve assembly is installed on the fuel filter housing, means on the fuel filter housing prevent disconnection of the snap connection. One or both of the primary parts of the valve assembly can be provided with a tamper evident feature that will indicate whether someone has tried to remove or disassemble the valve assembly.

Abstract: There is provided a water purifying filter assembly module that a water purifying filter can be easily released from or assembled with. A water purifying filter assembly module according to an aspect of the invention may include: a filter assembly head having a water purifying filter assembled on one side thereof, the filter assembly head configured such that water to be filtered flows into the water purifying filter and the water, filtered through the water purifying filter, is discharged to an outside thereof; and a module body having the filter assembly head rotatably provided therein, the water purifying filter being released from or assembled on the filter assembly head as the water purifying filter is aligned and rotates with the filter assembly head.

Abstract: A filter assembly for filtering a fluid. The filter assembly at least one filter in a housing, an inlet lid mounted over the filter housing and including an inlet for the inlet of fluid into the housing, and an outlet lid mounted over the filter housing and including an outlet for the outlet of fluid from the housing. The assembly also includes an inlet plunger adapted for sealing flow from the inlet when the inlet plunger is biased to a first sealing position, and an outlet plunger adapted for sealing flow to the outlet when the outlet plunger is biased to a first sealing position.

Abstract: A fluid filtration system is disclosed comprising a manifold assembly comprising a mounting bracket, an alignment collar connected to the mounting bracket, and a latch assembly moveable with respect to the mounting bracket and alignment collar. The system further comprises a filter cartridge comprising a filter cartridge outer surface and a cartridge latching structure formed on the filter cartridge outer surface to interact with the latch assembly. When the filter cartridge is aligned with the alignment collar and inserted into the manifold assembly, the filter cartridge is (i) latched into the manifold assembly by translating the filter cartridge into the manifold assembly to cause movement of the latch assembly to engage the cartridge latching structure; and (ii) unlatched from the manifold assembly by translating the filter cartridge into the manifold assembly to cause movement of the rotating latch assembly to disengage the cartridge latching structure.

Abstract: A filter assembly comprises a filter housing (23) into which a filter element is insertable. A core element (38) is provided extending within the housing (23). The filter assembly comprises a coupling assembly (200) that is insertable into the housing (23), the coupling assembly (200) comprising a leaf spring (201) having a span larger than an internal diameter of the filter housing (23), such that when the leaf spring (201) is inserted into the filter housing (23) the outer edge of the leaf spring (201) engages an inner surface of the filter housing (23) and the leaf spring (201) bulges in the direction of insertion of the leaf spring into the housing, preventing removal of the leaf spring, in a direction opposite to the insertion direction, from the filter housing (23), the coupling assembly (200) comprising a connecting part for connecting the core element (38) to the coupling assembly (200).

Abstract: A liquid filter arrangement is provided, as well as methods of assembly and use. The liquid filter arrangement includes an anti-drain back valve assembly therein. Advantageous features, relating to a preferred filter cartridge and preferred anti-drain back valve arrangement, are provided.

Abstract: An assembly is disclosed that includes a centerpost assembly and a fluid filter cartridge. The centerpost assembly includes a main body having an inlet flow opening, an open interior, and a radial flange. An interior shelf is positioned proximate the inlet flow opening of the main body. The interior shelf includes an interior flow opening. A check valve ball is movably positioned on the interior shelf to move between the inlet flow opening and the interior flow opening. A spring-loaded end cap is movably connected to an upper end of the main body and is configured to move between a compressed state and an uncompressed state. A blocking pin extends from a lower surface of the end cap. When the end cap is in the compressed state, the blocking pin prevents the check valve ball from blocking a flow of fluid from flowing through the interior flow opening.

Abstract: A “no filter, no run” filtration system that is designed to verify that a filter cartridge is present to safe-guard against damage to fuel injectors, associated fuel components, etc. and engine malfunctions. Fuel flow to the engine is prevented altogether or permitted in an amount insufficient to allow engine operation if a filter cartridge is not installed, and an appropriately designed filter cartridge is required to be used in order to permit sufficient fuel flow for engine operation. In one embodiment, a flow restriction valve is provided that includes a ball.

Abstract: Disclosed is a filter assembly including a filter cartridge including a housing, a filter provided inside the housing, and a cartridge connection portion provided at an upper portion of the housing, a head portion including a head connection portion to be coupled to the cartridge connection portion so that the filter cartridge can be attached and detached, a water inlet which introduces water to the filter cartridge, and a water outlet which discharges the water filtered by the filter cartridge, the head portion including a filter attaching and detaching lever which is movable between a first position, at which the head connection portion and the filter cartridge connection portion are coupled to each other, and a second position, at which the head connection portion and the filter cartridge connection portion are separated from each other, and can be supported by the head portion.

Abstract: A filter trap into which waste water can be dumped to separate particulate matter from the water. A sensor senses when the liquid level in the filter trap rises above a predetermined level, and triggers an alarm to indicate the filter basket is full of particulate matter and must be removed to dispose of the contents. The withdrawal of the filter basket from the filter trap causes the inlet thereto to automatically close so that waste water cannot be dumped into the filter trap when the filter basket has been removed. A sensor senses when the filter basket has been removed to provide a visual indication thereof.

Abstract: An oil filter arrangement comprises a housing, which has a receiving chamber for a filter element which can be cross-flowed in a radial manner by oil and which can be inserted into the housing, a support tube which supports the filter element when it is inserted, a housing cover which closes the receiving chamber, and a drainage channel which is provided in the base area of the receiving chamber. The support tube is fixed to the housing and it remains therein when the filter element is replaced and that a drainage plate, which comprises closing means for closing the drainage channel and which is arranged in an axially displaceable manner, to a limited extent, on the support tube, is arranged in the base area of the receiving chamber.

Abstract: In one aspect of the presently described embodiments, the system comprises an inlet to receive at least a portion of the fluid containing algae, a curved channel within which the fluid containing algae flows in a manner such that the neutrally buoyant algae flow in a band offset from a center of the curved channel, a first outlet for the fluid with algae within which the band flows, and, a second outlet for the remaining fluid.

Abstract: A filter cartridge including a housing having a water inlet and outlet, a valve disposed in the housing and defining transversally aligned inlet and outlet passageways, and having a first key formation that vertically depends from the valve, a cartridge having transversely separated inlet and outlet ports transversely aligned relative to a longitudinal axis of the cartridge, each of the ports engageable in a corresponding one of the passageways, and a complementary key formation for engaging the first key formation for ensuring proper engagement of the ports in the passageways where the ports and the key formation project from a common plane. The valve is rotatable in the housing between an open position in which feed water passes through the inlet passageway and into the cartridge, and treated water flows to the outlet passageway, and a closed position in which water is prevented from flowing to and from the valve.

Abstract: The invention relates to an oil filter arrangement having a housing comprising a receiving space for a filter element, wherein a discharge opening is provided at the bottom of the receiving space and a discharge valve is provided in the discharge opening wherein the discharge valve comprises a valve body, which is movable between a closing position and an opening position in a displaceable manner and is moved to the locking position by a first spring element when the filter element is inserted, wherein the first spring element is disposed on the valve body on the side of the valve body facing away from the discharge opening and is configured as a compound spring having a flat, bent metal band. The metal band acts against the filter element or against an end disk of the filter element when the filter element is inserted.

Abstract: A filter device includes at least one filter element (10) housed in a filter housing (22) and connected for the flow of fluid by fluid connections (30, 36) to a fluid device, in particular in the form of a hydraulic tank (40), using a connector device (44). A plunger valve arrangement is achieved, whereby the connector device (44) is provided with at least one longitudinally-displaceable blocking piece (46). In the blocking position, the blocking piece blocks the provided fluid connections (30, 36). After displacement into an open position, it releases the fluid connections. A blocking or releasing of the fluid connections in a rapid operation process is permitted to carry out a filter element exchange for the used filter medium.

Abstract: A filter cartridge with a valve actuating protrusion having a sliding surface that is configured to engage with a valve, with the sliding surface being tapered so that a first portion of the sliding surface that engages the valve is wider than a second portion of the sliding surface that engages the valve, and the sliding surface is configured so that the first portion engages the valve before the second portion. The valve, which can be in any fluid passage of a filter housing, includes a plurality of spring arms. Engagement between the spring arms and the sliding surface creates a lifting force which opens the valve.

Abstract: An ultraviolet (UV) water treatment device includes a housing with an inlet and an outlet. Water flows into the housing through the inlet, is exposed to the UV light, and the treated water then flows out of the housing through the outlet. The UV light source is inserted into a quartz tube from above so that the UV lamp can be changed without draining the system. A lower access port is provided in the bottom of the housing. The lower access port includes a seat that contains the lower end of the quartz tube, and further allows a user of the system to remove debris from a broken quartz tube quickly and safely.

Abstract: A separation device includes a separation chamber having a housing for housing a stationary phase configured for separating compounds of a fluid sample. The separation device also includes a filling port configured for filling the stationary phase through a filling channel into the separation chamber, and a locking piece comprising the filling channel. The locking piece is configured to move the filling channel from a first position, wherein an opening of the filling channel is opening into the separation chamber for filling the stationary phase into the separation chamber, to a second position, wherein the separation chamber is locked against the filling channel. The locking piece is configured to move the opening of the filling channel substantially laterally with respect to the housing.

Abstract: Disclosed is a unique filter assembly for ensuring replacement cartridge compatibility in filtration systems having replaceable filter cartridges with lugged mounting systems. One representative filter assembly includes a representative cartridge member having a body portion for enclosing filter media and a neck portion depending therefrom. The representative neck portion of the representative cartridge includes at least one axial inlet port for directing unfiltered fluid into the body portion and at least one axial outlet port for directing filtered fluid out of the body portion. The representative neck portion also has at least two representative lugs depending radially outwardly therefrom, wherein at least one lug defines a keyed surface formation.

Abstract: A fluid filter centerpost assembly in combination with a fluid filter cartridge for creating a “no filter-no run” design according to one embodiment of the present invention comprises an oval-shaped design for the centerpost assembly and an oval-shaped design for a seal that is positioned between the centerpost assembly and the fluid filter cartridge. The centerpost assembly includes a main body having an oval shape in lateral cross section in unitary construction with a radial flange and interior shelf. The interior shelf defines a flow opening and a movable valve ball is positioned on the interior shelf and is able to move in the direction of the flow opening due to incoming fluid pressure. The fluid filter cartridge includes a closed endcap with a blocking pin such that when the fluid filter cartridge is installed, the blocking pin is positioned to prevent the valve ball from closing off the flow opening.