Abstract: An ion exchange tank is provided. The ion exchange tank includes a processing chamber and an additive chamber separated by a weir system, the weir system having a flow channel fluidly connecting the processing chamber to the additive chamber, wherein the flow is divided from the additive chamber by a first partition and divided from the processing chamber by a second partition, wherein the additive chamber comprises a solids-absorbing material disposed therein.

Abstract: A centrifuge rotor for sample vessels includes a seal between a lower part and a cover. The seal comprises a gasket, which is arranged in a first groove. The first groove is arranged on one of the elements constituted by the cover and the lower part. The first groove, in relation to the axis of rotation of the centrifuge rotor, is open axially toward the other of the elements constituted by the cover and the lower part.

Abstract: A rotor of a centrifugal separator, wherein the rotor comprises a central shaft on which an axially movable plate stack, formed by multiple plates, is arranged. A stack base is arranged on the shaft under the plate stack. A stack cap is arranged in an axially moveable manner on the shaft above the plate stack. The rotor includes a compression spring surrounding the shaft, with a first end supported on the shaft and a second end supported on the stack cap, pressing the plate stack together. The rotor includes a sleeve-like extension arranged on the stack cap, projecting into the plate stack and surrounding the shaft with a separation. The compression spring is located inside the extension, at least over a majority of the axial length thereof. A support surface for the second end of the compression spring, is arranged on a base of the extension.

Abstract: The rotary bowl (1) of this centrifugal separator is lined with conical structures divided into sectors (7) separated by angularly offset gaps (9) so as to promote a regular spiral fluid flow therein, which is laminar and enhances separation efficiency significantly: in the case of two-phase or three-phase suspensions, a “cake” is obtained on the side wall (8). A scraper (15) rotating at a slightly different speed may be added to enable simultaneously routing of the solid cake to the outlet and continuous processing.

Abstract: A centrifugal separator for separating a fluid mixture into components includes a rotor which forms within itself a separation space delimited by a rotor wall, and includes a set of separation plates defining separation passages there between. An inlet is arranged for supply of a fluid mixture to be separated and a first outlet is arranged for a separated lighter first component of the fluid mixture. A sludge space is being defined as an annular portion of the separation space radially outside the separation plates. A second outlet is arranged for discharge of a separated denser second component of the fluid mixture extending from the radially outer portion of the sludge space. A plurality of sludge space plates, which sludge space plates are separate components from the separation plates, is arranged in the sludge space, extending outwardly and in an annular direction with respect to the rotational axis, while forming a gap between the sludge space plates and the rotor wall.

Abstract: A separation cone (30) is mounted into the interior chamber of a centrifugal separator rotor (10), which comprises a cover (14) releasably connected to a base (16), in order to provide a frusto-conical wall subdividing the chamber into upper and lower regions. This slows the passage of fluid from the upper to the lower region, which takes place via openings (24) and/or via a gap between the inner rim (32) of the cone (30) and the axial inlet tube (12). The separation cone (30) is connected to the cover (14) by a releasable snap fit arrangement, such as by deflectable tabs (38) around the periphery of the separation cone (30) engaging into a groove (15) around the interior surface adjacent a lower edge of the cover (14). This allows there to be a predetermined sequence of servicing operations and ensures that the separation cone (30) will reliably stay with the cover (14) when the cover is removed.

Abstract: A centrifugal separator for continuous separation of a fluid mixture into components includes a rotor, which forms within itself a separation chamber, including in said separation chamber a set of separation discs defining separation passages between adjacent separation discs. The separator further includes an inlet operatively connected to said rotor for continuous supply of a fluid mixture to be separated in the separation chamber, a first outlet for a separated lighter first component of the fluid mixture extending from a radially inner portion of the separation space, and a second outlet for a separated denser second component of the fluid mixture extending from the radially outer portion of the separation space. The separation discs are provided with a coating including silicon oxide, SiOx, prepared through sol-gel processing.

Abstract: The present invention relates to a separator for separating air and possibly present solids from a mixture of dental waste water, comprising an air-water separator, wherein a mixture supply tube opens into a centrifuge drum, an air discharge duct extends from the centrifuge drum to the mixture supply tube and the centrifuge drum includes an upper drain edge over which a water outlet is guided onto the outside of the centrifuge drum. In accordance with the invention, the separator is characterized in that the mixture supply tube opens onto a central turbine wheel arranged above the centrifuge drum bottom and an impeller of a waste water delivery pump, which communicates with the water outlet, is arranged on an outside of the centrifuge drum in the vicinity of the centrifuge drum bottom.

Abstract: A centrifuge opening tool has a frame that securely holds a centrifuge drum therein. An upright tube is mounted to the frame and a brake band is rotatably secured to the upright tube. When the brake band is tightened, the centrifuge drum is securely held in place. A ring gear is secured to a lock ring. The lock ring is part of the centrifuge drum and is removable to allow access to the interior therein. A drive gear meshes with the ring gear and increases the mechanical advantage allowing a user to apply the force needed to open the lock ring even when it has been extremely compressed. A spanner wrench is placed on a drive shaft that is connected to the drive gear. Engagement pins are used to mechanically couple the gear ring and lock ring together.

Abstract: A hermetically sealed solids discharge centrifugal separator having a separator bowl with a cylindrical upper portion and a conical lower portion, an inlet port at the bottom of the bowl and an outlet port at the top of the bowl. A disposable liner assembly includes a bowl liner having a cylindrical upper portion and conical lower portion, such that the bowl liner can conform to the interior surface of the separator bowl. The liner assembly further includes a piston within the bowl liner, the piston having an upper portion that conforms to the bowl liner cylindrical upper portion and a lower portion that conforms to the bowl liner conical lower portion. A fluid pathway extends through the piston, with a shuttle valve disposed within the fluid pathway.

Abstract: An apparatus for separating a fluid flow, the fluid flow comprising lighter and heavier fractions to be separated from each other, comprises a rotary centrifuge device (1), the lighter fractions being carried further on and the heavier fractions being carried through an outlet (5). The invention is characterized in that a spin-up assembly (17) is arranged upstream of the rotary centrifuge device (1), the spin-up assembly (17) being configured in such a manner that the fluid flow entering the rotating cylinder (1) is imparted a rotational movement, the rotational velocity of the cylinder (1) being adjustable so that the relative velocity difference between the rotating movement of the fluid flow and the rotational velocity of the centrifuge device (1) is optimal in terms of separation.

Abstract: A rotor unit for a centrifugal separator, which centrifugal separator comprises a non-rotatable housing wherein the rotor unit is disposed about a central axis of rotation, an inlet for supply of a mixture of components to be separated, at least one outlet for a component separated during operation, whereby the rotor unit, at least parts of which are made of metal, comprises a separating chamber formed inside the rotor unit, an inlet chamber connected to the inlet and the separating chamber, is formed radially within said separating chamber and is usually shielded from the separating chamber, at least one outlet connected to the separating chamber, a plurality of separating discs disposed at a distance axially from one another in said separating chamber coaxially with the axis of rotation, at least a number of the metal parts of said rotor unit are undetachably joined together to form a composite assembly.

Abstract: In a compressible unit a plurality of separating discs are provided and adapted to being capable, in a compressed state, of being mounted in and removed from a centrifugal separator rotor, which rotor during operation is rotatable about an axis of rotation. The unit includes a support, a pressure surface, between which the separating discs are disposed abutting against one another. Guide surfaces abut against the separating discs and control radial and polar position. At least one compression mechanism is adapted during compression of the unit to press the support and pressure surface towards one another so that the discs are compressed. During compression, the guide surfaces allow relative movement between the support and pressure surface and the separating discs, and are of at least sufficient extent in the compression direction for the position-controlling abutment between the guide surfaces and the separating discs to be maintained throughout the relative movement during the compression.

Abstract: Centrifugal separator devices, systems and related methods are described. More particularly, fluid transfer connections for a centrifugal separator system having support assemblies with a movable member coupled to a connection tube and coupled to a fixed member, such that the movable member is constrained to movement along a fixed path relative to the fixed member are described. Also, centrifugal separator systems including such fluid transfer connections are described. Additionally, methods of installing, removing and/or replacing centrifugal separators from centrifugal separator systems are described.

Abstract: Centrifugal separators and related methods and devices are described. More particularly, centrifugal separators comprising a first fluid supply fitting configured to deliver fluid into a longitudinal fluid passage of a rotor shaft and a second fluid supply fitting sized and configured to sealingly couple with the first fluid supply fitting are described. Also, centrifugal separator systems comprising a manifold having a drain fitting and a cleaning fluid supply fitting are described, wherein the manifold is coupled to a movable member of a support assembly. Additionally, methods of cleaning centrifugal separators are described.

Abstract: The invention relates to a device for separating impurities from the lubricating oil of an internal combustion engine. The device comprises a filter insert on the bottom and a centrifuge thereabove that is provided with a rotor which is driven by means of penetrating lubricating oil. The filter insert and the centrifuge are disposed on top of each other in a common two piece housing that is closed during operation of the device and encompasses a removable top screw cap and a fixed bottom housing part. A removable intermediate lid is positioned between the filter insert and the centrifuge within the housing. The centrifuge, the intermediate lid, and the filter insert can be removed from the housing in the open state thereof. Furthermore, the screw cap and the intermediate lid of the device are provided with detachable connecting members which engage with each other and transmit axial tractive forces or axial tractive and compressive forces.

Abstract: A filtration centrifuge according to a typical embodiment of the present invention includes a housing canister, a rotor assembly, a rotor shaft, a top cap, and a bottom cap. In an alternative embodiment of the present invention, the rotor assembly mounts into the canister without the use of a rotor shaft. The canister is open at both ends and the manner of connection between the top and bottom of the canister and the top and bottom caps includes all possible combinations of internal threads, external threads, and a bayonet connection.

Abstract: A cyclone separator useable in a surface cleaning apparatus comprises a cyclone casing defining a cyclone chamber and having first and second opposed ends and a sidewall extending between the first and second ends. A separated material collection chamber surrounds at least a portion of the cyclone chamber and is communication therewith via a separated material outlet. The separated material collection chamber is spaced at least about 0.5 inches from the cyclone chamber. In addition, the separated material collection chamber is spaced from the bottom of the cyclone by at least about 0.5 inches.

Abstract: The invention relates to a rotor for a centrifuge for cleaning a liquid, in particular the lubricating oil of an internal combustion engine, wherein the rotor is designed in two parts, namely, on the one hand, a drive part and, on the other hand, a dirt-collecting part comprising a dirt collection area, wherein the dirt-collecting part can be connected to the drive part to the rotor, and wherein the dirt-collecting part can be detached, for disposal or cleaning, by being pulled off axially from the drive part.

Abstract: The invention relates to a rotor (10) for a centrifuge (1) for cleaning a liquid, in particular the lubricating oil of an internal combustion engine, wherein the rotor (10) is designed in two parts, namely, on the one hand, a drive part (2) and, on the other hand, a dirt-collecting part (3) comprising a dirt collection area, wherein the dirt-collecting part (3) can be connected to the drive part (2) to the rotor (10), and wherein the dirt-collecting part (3) can be detached, for disposal or cleaning, by being pulled off axially from the drive part (2).

Abstract: An annular centrifugal extractor with an immersed agitation rotor. The liquid-liquid centrifugal extractor including an emulsion chamber and a settling chamber, aligned because of the addition of a section of axis to the rotor, which allows flow and operation to be regularized, especially by allowing the dimensions of the chambers to be selected more freely.

Abstract: A centrifuge, comprising a distributor for introducing material to be centrifuged and a sieve system having a plurality of axially mutually offset membrane plates, the membrane plates being arranged radially with respect to the distributor and having at least two axially-spaced membrane disks. The sieve system is arranged such that a flow directions of material to be centrifuged emerging from the distributor and a flow direction of particles deposited on the membrane plates are identical. Alos included is centrifugal drum having a centrifugal compartment with the sieve system arranged therein and a piston slide valve for closing the centrifugal drum. The invention is also a method for cleaning the centrifuge, the steps comprising: opening a piston slide valve, thereby allowing a return flow of liquid through the sieeve system; and removeing one or more of substances baked to the sieve system and impurities from the sieve system.

Abstract: A system for collecting red blood cells (RBCs) and other blood components that reduces the need for human intervention. A disposable set is provided having a port, an RBC container, a centrifuge rotor having a variable total volume, and a filter, along with tubing connecting the port, the container, the rotor and the filter. A control unit is also provided and includes a spinner in which the rotor may be held, a flow-control arrangement for controlling flow among the various components of the disposable set, and an electronic controller. The whole blood is directed by the flow-control arrangement from the port through the tubing to the rotor. The rotor includes an elastic diaphragm, and the control unit's flow-control arrangement includes a pump or other device for applying a positive and negative pressure to the rotor's elastic diaphragm. The spinner rotates the rotor so as to separate the whole blood into plasma and RBCs.

Abstract: A self-driven centrifuge for separating particulate matter out of a circulating liquid includes a base having a pair of tangential jet nozzles for generating the self-driven force for the centrifuge. Connected to the base is a centrifuge shell which defines a hollow interior space. A hollow rotor hub having a central axis of rotation is assembled to the base and extends through the hollow interior space. A support plate is positioned within the hollow interior space and, in cooperation with the rotor hub, defines an annular flow exit opening for the circulating liquid. Positioned within the hollow interior space is a separation vane module which is constructed and arranged so as to extend around the rotor hub and positioned so as to be supported by the support plate. The separation vane module includes a plurality of axially-extending and spaced-apart separation vanes.

Abstract: In a centrifugal separator for separating solids from a liquid mixture in which the solids in the form particles are suspended in a liquid having a density less than that of the particles the centrifugal separator includes a rotor rotatable at a first speed. A screw conveyor is arranged in and coaxial with the rotor and rotates at a second speed differing from the first speed. A drive device is adapted for rotation of the rotor at the first speed and the screw conveyor at the second speed. The rotor is totally supported at one end only through a rotor shaft that is arranged so that the rotor central axis extends substantially vertically. The rotor includes an inlet for the mixture, in the form of at least one inlet channel which extends into the rotor at one end and a liquid outlet for separated liquid, in the form of at least one outlet channel which extends out of the rotor at one end, and a sludge outlet for separated solids situated at an opposite end of the rotor.

Abstract: A five-part rotor assembly is easily disassembled for cleaning and/or sterilization. The five parts comprise a rotor sleeve, a rotor head, a weir plate, a rotor cover and an internal vane package. Each of these parts is machined as a unitary piece or otherwise fabricated without weldments.

Abstract: The invention refers to a decanter centrifuge particularly for sludge centrifugation, incorporating a drum, a rotor arranged therein and equipped with a helical screw for feed of sludge, a sludge outlet and a reject outlet and a flush washing device for washing (flushing) in countercurrent to the dewatered sludge. In the rotor in close connection to the blades of the helical screw are provided a number of threaded holes for connection of the nozzles of the flush washing device. In response to the washing requirement, certain or entire groups of threaded holes are closable by means of sealing plugs, so that the washing (flushing) can be effected in several consecutive steps with portions without flushing in between.

Abstract: A centrifugal separator (FIG. 1) has a base adapted to be mounted to a surface of a machine, such as an engine, with internally communicating high pressure liquid lubricant supply and low pressure drain passages. The base includes a control valve to inhibit supply to the rotor via spindle so that the cover and rotor can be removed whilst the base is still connected to the source of high liquid pressure. The valve takes the form of an aperture containing a valve body rotatable by handle to close the supply passage or (FIG. 2) create a diversion passage directly to the drain passage. An interlock device may be provided to impede cover removal with the valve open and/or impede accidental closure of the valve.

Abstract: A centrifuge including a non-rotatable containment vessel, a rotatable centrifuge tube within said vessel, an inlet assembly for dirty gas, an outlet assembly for clean gas, and an outlet assembly for dirty gas, said inlet assembly for the dirty gas and said outlet assembly for the dirty gas being located in close mutual proximity and at or towards one end of the centrifuge tube, the outlet for the clean gas being located at the opposite end of the centrufuge tube, the flow of gas entering the centrifuge tube being reversed within the centrifuge tube so as to increase the residence time of the dirty gas within said centrifuge tube. The centrifuge tube is supported on spaced foil bearings located at predetermined spacings relative to each other and to the ends and center of the centfrifuge tube.

Abstract: An apparatus and method are disclosed to wash blood cells in a discrete manner that is compatible with automated sample preparation systems. The test tube containing the cells to be washed is mounted on a rotatable spindle. The spindle includes central passageways for the introduction of wash fluid and air into the test tube, and radial exit passageways at the bottom of the spindle. The test tube is first spun about its vertical axis to centrifuge cells against the inner wall of the test tube. A vacuum is then applied to the exit passageways so cell supernatant is aspirated out through the exit passageways. Wash fluid is then introduced into the test tube, and aspirated out through the exit passageways, thereby washing the cells. Rotational acceleration and deceleration of the test tube then resuspends the cells in wash fluid.

Abstract: A scale modelling centrifuge has a relatively massive rotary circular base wall, which may form part of a drum, possibly with a detachable peripheral wall either carrying an annular sample-receiving trough or constituted by such trough, or which may have mounted therearound a plurality of sample-receiving containers.

Abstract: A centrifuge bowl for separating whole blood into less dense and more dense components and for collecting both less dense and more dense components without stopping bowl rotation. The fluid pathway from an inlet port to a separation chamber comprises an inlet tube and an introduction passageway. The fluid pathway from the separation chamber to an outlet port comprises a collection passageway. The introduction and collection passageways are nonrotatable. The more dense blood components can be extracted from the bowl during rotation by applying suction at the inlet port or pressure at the outlet port.

Abstract: A decanter centrifuge including a drum that is rotatably journalled at its ends includes a separating compartment defined by end walls and a rotatably journalled conveyor disposed in the separating compartment and rotatably journalled in two bearings, one located at the free end of a trunnion projecting into the conveyor body. The separating compartment has a length to diameter ratio greater than four and the trunnion has a length in the range from 0.5 to 3 times the largest diameter of the separating compartment. Due to the short distance between the conveyor bearings, the rigidity of the conveyer increases, thereby increasing the critical RPM of the drum.

Abstract: A discontinuously operated filter centrifuge has its noninverting filter bag attached only to the filter bottom which is displaceable out of the filter drum, so that when the filter bag is displaced out of the filter drum, a clearance is provided between the filter bag and drum to enable inspection of the interior of the drum.

Abstract: The rotor of a centrifugal separator includes two axially separated end walls and one surrounding wall situated between the end walls. The end walls and a stack of separation discs within the rotor are maintained axially together by a central fastener. The surrounding wall, which is separate from the two end walls, is movable axially during rotor operation relative to at least one of the end walls. The surrounding wall has an inner diameter at the areas where it seals with the ends walls that is smaller than the portions between those sealing areas.

Abstract: An improved core member for a centrifuge bowl is described in which a plurality of small size circular openings are formed in the core member between a toroidal blood cell separation chamber and a collection chamber to provide fluid communication therebetween for collection of blood component in one flow direction and removal of stains in an opposite flow direction.

Abstract: Centrifugal oil filters are described comprising a rotatable centrifugal cleaning cartridge, a shaft for rotation thereon, a co-operating member for connecting the filter assembly to a source of fluid to be cleaned, an outer casing member, a closure member for sealing one end of the casing member and a fluid drain conduit and wherein the centrifugal cleaning cartridge may be removed without removal of the outer casing member or disconnection of the fluid drain conduit.

Abstract: An adapter preferably of ultra high molecular weight polyethylene is provided for use with a conical centrifuge tube in an ultracentrifuge swinging bucket rotor hole and is designed to allow the easy removal of the adapter and tube after centrifugation. At the top of the adapter is an integral annular rim with an outside diameter equal to that of a cylindrical upper portion of the centrifuge tube and with a minimal clearance to the diameter of the rotor hole. Immediately below the annular rim and adapter diameter reduces to a lesser diameter and continues until intersection with a hemispherical bottom region. The internal configuration of the adapter has a tapered conical section ending in a reduced diameter hemisphere, the internal taper and hemisphere of the adapter exactly matching the exterior of supported conical portion and hemispherical termination end of the sample tube.

Abstract: An improved disposable plasmapheresis centrifuge bowl is described comprising a rotary seal enclosing an aperture in a one-piece seamless bowl body through which various core members may be inserted.

Abstract: A vertical centrifugal separator, for example of the type used to dry coal, is improved by splitting the frustoconical screen into two pieces and including access doors in the water shield surrounding the screen. The division of the screen is made horizontally, for example at a level of about 30 to 70 percent down from the top of the screen. This permits the separator to be serviced in a relatively short time, by replacing only the upper partial screen when holes are worn in it. This is feasible because most of the wear in these screens is confined to about the upper 30 percent of their height. If a screen support basket is used, it can be confine to the lower partial screen, so that it does not have to be removed in order to replace the upper partial screen.

Abstract: An improved disposable blood processing centrifuge bowl is described comprising a rotary seal enclosing an aperture in a bowl body through which a two-piece core assembly is inserted.

Abstract: In a centrifuge device whose purpose is in particular the separation of amalgam from waste water generated in dentist' offices, the following is provided in order to improve the determination of the filling level in a collecting tank downstream from a centrifuge, to obtain better utilization of the container volume, to reduce the residual moisture in the separated solids, and to simultaneously eliminate the repumping means which operate between the collecting tank and the centrifugal. The collecting tank is detachably attached to a centrifuge drum and rotates together with the centrifuge, with measures being taken for separating the clean-water space from the centrifuge drum, there is also provided a transport container which can be detached from the device together with a collecting tank, which container can, when the collecting tank is in it, be closed by means of a cover which, when it is not in use, is detachably attached to the transport container.

Abstract: In a centrifuge rotor for separation of two liquids having different densities from a mixture thereof a stack of conical separation discs (21) is arranged in the separation chamber (13) with the base portions of the separation discs turned towards one end and with the apex portions of the separation discs turned towards the other end of the separation chamber. According to the invention the separation chamber (13) has an inlet for mixture situated at the end, towards which the separation discs turn their apex portions, and an outlet for separated relatively heavy liquid situated at the opposite end. The inlet for liquid mixture as well as both outlets for the separated liquids are situated at the same axial end wall of the centrifuge rotor.

Abstract: A liquid separator has a centrifuge rotor (1) with a set of conical separation discs (21) arranged coaxially in the separation chamber (13). The inlet of the separation chamber is formed as inlet passages (20) which extend radially outwards from a central inlet chamber (16) in the rotor, along that end wall of the separation chamber, towards which the apex ends of the separation discs face. The inlet passages (20) are formed between that end wall and a partition member (18, 19) situated between the rotor end wall and the separation discs (21). The outlet of the separation chamber (13) for separated liquid is formed by a number of channels (22) through the partition member (18, 19) and aligned channels through tubular members (23) bridging said inlet passages (20).

Abstract: A centrifuge for separating mixtures of liquids. The drum has an upper diversion chamber and a lower diversion chamber that divert the fractionated constituent of the liquid out of the drum and that are separated by a replaceable lid. At least one of the diversion chambers has a peeling structure that is provided with channels and an intake pipe that supplies the mixture of liquids. The drum can be equipped with another chamber lid and with another peeling structure with channels and an intake pipe. The channels in the second peeling structure open into the intake pipe and the second chamber lid unites the two diversion chambers into a single chamber.

Abstract: A centrifuge for the removal of solids from liquids, for example, the removal of solid fission products from dissolved nuclear fuel. The centrifuge is mounted behind a solid wall and is provided with a pivotable catch tray which cooperates with a feed inlet extending through the wall of a casing about the bowl of the centrifuge. The catch tray is pivotable between a first position at which it cooperates with the feed inlet to introduce feed liquid into the bowl and a second position at which it is removed out of cooperation with the feed inlet to permit withdrawal of the bowl from the casing through a removable plug in the wall.

Abstract: Centrifugal separator, the separation chamber (9) of which is surrounded by a first rotor part (1) and a second rotor part (2), an annular flange portion (3) of the first rotor part (1) being axially inserted into a sleeve formed end portion (5) of the second rotor part (2) and connected thereto by means of a locking joint. The locking joint comprises locking elements (8), which are brought radially outwards from a position radially inside said sleeve formed end portion (5) and axially outside said annular flange portion (3), such that one part of each locking element (8) is located in an internal recess (7) in the sleeve formed end portion (5), whereas the remaining part of the locking element (8) is located radially inside the periphery of said flange portion 3, whereby the locking element 8 is arranged to transmit axial forces from the first rotor part (1) to the second rotor part (2).

Abstract: The present invention is with respect to a bell-like centrifuge drum for freeing metal turnings of oil continuously and which is made up of a lower drum part (1) with a floor (2) and a coned wall part (3), at whose top edge an outwardly running flange (4) is placed and an upper drum part (5) at whose lower edge there is again an outwardly running flange (6), which, producing a gap (10) for letting off liquid to be cleared from the turnings, is fixed on the flange (4) of the lower drum part (1).

Abstract: A centrifuge rotor includes a dynamically balanced casing assembly having upper and lower parts that define a hollow bowl with a continuous peripheral gap between such casing parts. The casing parts are held in position by a series of bolt assemblies which maintain the axial spacing. Each bolt assembly has a pair of portions respectively, rigidly secured to the casing parts, such bolt assembly portions having concentric interfitting surfaces, with a screw extending through one of said bolt assembly portions into the other. The concentric interfitting surfaces preferably include a step whereby precise location of the casing parts with respect to each other is achieved, even upon reassembly, thereby facilitating disassembly and reassembly as well as assuring maintenance of dynamic balance.

Abstract: The disclosure is directed to a cartridge type centrifuge for separating particulate matter from fluids. The cartridge comprises a plurality of flow stages, each of which consists of alternately wrapped layers of flat and corrugated paper defining a plurality of vertical passages, the corrugations determining the space between passages. To effect uniform flow throughout all vertical passages, which brings maximum particle separation efficiency, the centrifuge includes a unique baffle which causes all fluid to flow through an area of maximum angular momentum.