Abstract: A tank assembly. Said tank assembly comprises a one or more blister assemblies, a shell assembly, a one or more air inlet hoses, a one or more spray equipment and a slurry mixture. Said one or more blister assemblies comprises a first blister assembly and a second blister assembly. Said one or more blister assemblies comprise a one or more draw tubes, a one or more cone flanges, a one or more head assemblies, a one or more shells, a one or more cone assemblies, an air line assembly, a one or more snorkel assemblies, and a separation distance. Said one or more draw tubes comprise a first draw tube and a second draw tube. Said separation distance between said one or more draw tubes is configured to allow said one or more spray equipment to rotate freely on said one or more draw tubes without interfering with one another.

Abstract: This disclosure provides a new internal weld blasting system for blasting the internal surfaces of pipes, and the method of use thereof. The system comprises a control cage having two relatively narrow openings. An impeller forces abrasives onto a blast wheel, which in turn sprays the abrasives onto the internal surfaces of the pipes.

Abstract: An abrasive grain jet grinding device having a belt partially wrapped around an impeller with blades between a shaft-side disc and an open disc and an open peripheral surface between the blades, a nozzle tangential to the disk at the point of separation between the belt and the peripheral surface, wherein the blades held between the shaft-side disc and the open disc are formed from thin plates to finely partition the circumference of the discs, are inclined forward in the direction of rotation of the discs, are provided densely so that multiple adjacent blades overlap each other, and are set with narrow gaps between the blades to form a large number of storage chambers for the abrasive grains.

Abstract: The present application thus provides a cleaning system for use with a compressor of a turbine engine. The cleaning system may include a wash nozzle positioned about the compressor and a spheroid injection port to inject a number of spheroids therein.

Abstract: A taper head control assembly is provided for a fluid jet cutting system. A base is movably mounted relative to a cutting table. A tilt body carries a fluid jet cutting apparatus and includes a rack. A tilt housing supports the tilt body and includes a pinion engaging the rack for selectively tilting the fluid jet cutting apparatus. A rotational axis housing is mounted to the base and a collar is rotatably mounted relative to the rotational axis housing. The collar carries the tilt axis housing to selectively rotate the water jet cutting apparatus relative to the base.

Abstract: An abrasive entrainment waterjet cutting system capable of cutting objects located underwater, particularly in deep subsea environments, wherein the abrasive system is comprised of an abrasive component suspended in a hydrophobic matrix component.

Abstract: In a method for producing a water jet (45) that contains abrasive and emerges under high pressure from a nozzle (44), uninterrupted operation with, at the same time, greater working performance and lower costs is made possible in that, in a first step, an abrasive suspension (34) containing abrasive and water is provided at normal pressure, in a second step the provided abrasive suspension (34) is brought to a working pressure that is greatly above normal pressure, and in a third step a water jet (45) containing abrasive is produced, with a nozzle (44), from the abrasive suspension (34) that is under the working pressure.

Abstract: In accordance with one implementation, a fluid jet lance can include a camera mount configured to selectively position a thermal imaging camera in a line of sight of a user. In accordance with another implementation, the thermal imaging lance can be utilized by orienting a thermal imaging camera attached to the fluid jet lance in an operator's line of sight with a solid surface. The lance may then be aimed at a target behind the solid surface. The solid surface may be penetrated by using a jet of fluid emitted from the lance. And, a jet of fluid may be dispensed at the target. In accordance with yet another implementation, an apparatus can include a fluid jet lance as well as a source of abrasive material coupled with the fluid jet lance. A source of a chemical agent may also be coupled with the fluid jet lance.

Abstract: The Food Grade USDA Abrasive Media System is an aqueous slurry Food Grade USDA abrasive media or FDA Approved aqueous slurry toothpaste formula system, or differential pressurized variable control regulation closed-type Food Grade USDA abrasive media or FDA Approved toothpaste formula system. The aqueous slurry type system pumps aqueous slurry media from an aqueous slurry pump. The differential pressurized variable control regulation closed-type system utilizes negative pressurized air or drawing the media from a control valve. The hallmark of The Food Grade USDA Abrasive Media System is light and easy to operate opening the door to whole new market of customers to safely perform paint stripping and cleaning tasks. Efficiency of operation is acquired by way of diffusion, equal particle distribution, and the effective Food Grade USDA Abrasive Media System can compete against harmful paint thinners, petroleum distillates, and chemical cleaners.

Abstract: The shot-blasting machine for surface treatment of products comprises a base frame, a containing chamber for containing at least a product to be treated associated to the base frame and provided with at least an access opening, one or more projecting organs associated internally of the chamber for projecting a flow of shot-blasting particles onto the product, and automated unloading means associated to the base frame which cause the product to exit from the chamber through the access opening.

Abstract: A method of prepping a surface using a high-frequency forced pulsed waterjet entails generating a high-frequency signal having a frequency f using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip of the transducer to vibrate to thereby generate a forced pulsed waterjet through an exit orifice of a nozzle having an exit orifice diameter d and a length L. The forced pulsed waterjet prepares the surface to within a predetermined range of surface roughness. The surface roughness is determined by selecting operating parameters comprising a standoff distance (SD), a traverse velocity VTR of the nozzle, a water pressure P, a water flow rate Q, a length-to-diameter (L/d) ratio, a microtip-to-orifice distance (a), the frequency f, and an amplitude A of the high-frequency signal.

Abstract: A profile cutting apparatus comprising: a cutting head supporting a nozzle through which a cutting medium passes, and at least two drives that drive the cutting head to tilt relative to a vertical axis while driving the cutting head to rotate about the vertical axis, wherein the tilt of the cutting head is achieved by the relative difference in motion between the two drives.

Abstract: A blasting device includes a flow passage (14) for a carrier gas, the flow passage (14) forming a blasting nozzle (12) at its downstream end, and a supply line (22) for liquid CO2, the supply line opening out into an expansion chamber (26) that is coaxially accommodated in the flow passage (14), the expansion chamber (26) being formed by a pipe (20) that is held at its upstream end by a holder (18) which is passed by the flow of carrier gas in the flow passage, and in that the supply line (22) extends through the holder (18) in transverse direction of the flow passage and opens into an expansion valve (24) that extends in parallel with the axis of the flow passage (14).

Abstract: An abrasive water jet processing machine for jetting a fluid and performing a cutting includes a fluid supply device, an abrasive supply device, an injection pressure controller, wherein the abrasive supply device includes a reservoir hopper consisting of a pressure vessel for reserving the abrasive, an abrasive supply tube for communicating with the reservoir hopper and the nozzle, and an air purge device for supplying compressed air to the abrasive supply tube and the reservoir hopper; the injection pressure controller performs a two-stage control of controlling injection pressure in a piercing; and the air purge device includes a flow pressure controller for controlling flow pressure of compressed air passing through the abrasive supply tube, wherein the flow pressure controller controls the flow pressure in the piercing to be higher than that in the cutting.

Abstract: An abrasive water jet processing machine for jetting a fluid and performing a cutting includes a fluid supply device, an abrasive supply device, an injection pressure controller, wherein the abrasive supply device includes a reservoir hopper consisting of a pressure vessel for reserving the abrasive, an abrasive supply tube for communicating with the reservoir hopper and the nozzle, and an air purge device for supplying compressed air to the abrasive supply tube and the reservoir hopper; the injection pressure controller performs a two-stage control of controlling injection pressure in a piercing; and the air purge device includes a flow pressure controller for controlling flow pressure of compressed air passing through the abrasive supply tube, wherein the flow pressure controller controls the flow pressure in the piercing to be higher than that in the cutting.

Abstract: Various embodiments of abrasive jet systems are described herein. In one embodiment, an abrasive jet system includes an abrasive container and a nozzle assembly. The nozzle assembly has a mixing region or cavity and an abrasive inlet. The abrasive jet system can also include an abrasive supply conduit that is operably coupleable between the abrasive container and the abrasive inlet. The abrasive supply conduit includes a first interior surface portion configured to be positioned proximate to the abrasive inlet and a second interior surface portion, different from the first interior surface portion, configured to be spaced apart from the abrasive inlet. In one aspect of this embodiment, the first interior surface portion has a greater ability to repel fluid (e.g., water) than the second interior surface portion, thereby reducing a tendency of the abrasives to clog the abrasive supply conduit.

Abstract: Disclosed are a simple device for processing substrate which can make a surface of a processed substrate smooth, a method for processing substrate with the use of the processing device, and a method for producing a processed substrate with the use of the processing method.

Abstract: An apparatus for cleaning a jet engine includes a supply device configured to make cleaning medium available, a nozzle device configured to introduce the cleaning medium into the jet engine, and a line connection between the supply device and the nozzle device. The cleaning medium can be solid carbon dioxide. A system including a jet engine and the apparatus. A method for cleaning a jet engine using solid carbon dioxide.

Abstract: Wet abrasive blasting systems are described that have a slurry piping system and a gas piping system that have pipes and other piping components, such as valves and regulators, that have a more consistent internal cross-sectional area than conventional wet abrasive blasting systems. The more consistent flow area provides astonishing improvements in blasting efficiency and consistent and predictable slurry flow rates.

Abstract: A device (33) for blast-machining or abrasive blasting objects such as structural elements, tools, household objects, pots, pans or the like, has a blast pot (3) for holding a blasting abrasive (35) which is connected via at least one line (21) to a blasting nozzle (24) which extends into a blasting space (1) in which the objects which are to be blasted can be placed. Compressed air is introduced above the blasting abrasive mixture (35) provided in the blast pot (3) by means of a pressure-generating means (43) and the blasting abrasive (35) thus being forced into the blasting space (1), the compressed air conveying via a second line (10) the granular material or the granular material mixture (35) and/or a suspension formed from granular material and liquid out of the blasting space (1) and back into the blast pot (3), which also takes the form of a pressurized space.

Abstract: A particulate blasting apparatus includes a blast vessel having an interior for storing abrasive particulate. The blast vessel has an inlet for introducing a pressurized gas into the interior of the blast vessel and an outlet for allowing the passage of the pressurized gas and particulate. A flexible blast hose is coupled at one end to the outlet for directing particulate flow from the outlet and a blast nozzle is coupled to an opposite end of the blast hose. A metering valve regulates different amounts of particulate flow from the blast vessel through the outlet. A flow actuator is coupled to the metering valve for actuating the metering valve. A controller associated with the blast nozzle in communication with the actuator controls the actuator from the blast nozzle during blasting operations. The blasting apparatus may be used as part of a blasting system that includes a compressor unit for providing the pressurized gas.

Abstract: A nozzle for a high pressure cutting arrangement is disclosed. The cutting arrangement comprises a liquid stream and a slurry stream, the slurry comprising abrasive particles suspended in a fluid, with both fluids being supplied into the nozzle under pressure. The nozzle has a combining chamber, having an entry region arranged to receive the liquid stream and the slurry stream, such that the pressure in the entry region is determined by the pressure in the liquid stream. The pressure in the entry region acts on the pressure in the slurry stream to regulate the pressure in the slurry stream.

Abstract: The invention relates to a device and method for cleaning, activating or pre-treating workpieces by blasting a carbon dioxide snow which is produced from pressurized CO2-containing fluids and at least one type of carrying compressed gas and is accelerated by means of a discharge nozzle (14), wherein a two-phase carbon dioxide mixture of a carbon dioxide gas and carbon dioxide particles is produced in an agglomeration chamber (8) by agglomerating and compressing carbon dioxide snow crystals which are radially added to the carrying gas in a multistage mixing chamber (10, 11, 12) comprising a central jet pipe (4), around which the carbon dioxide mixture circulates and which is used for supplying said carrying gas in such a manner that a high-energy turbulent gas flow for processing a workpiece is obtainable.

Abstract: Control device and method for controlling the impingement of the workpiece by a water jet or an abrasive water jet in a cutting unit. Control device includes a feeder composed of at least two flow-through areas positionable between a high-pressure water supply and a jet nozzle of the cutting unit. At least one of the flow-through areas includes a high pressure area, and at least one of the flow-through areas includes a pressure-reducing area. At least one switchable valve is arranged in the high-pressure area, a pressure-reducing mechanism is arranged in the pressure reducing area, and an impingement line is coupled to the at least two flow-through areas and coupleable to the jet nozzle.

Abstract: Disclosed herein are nozzle configurations for an abrasive blasting system. The system can comprise multiple hoppers for feeding separate powders streams to a fluid jet. The separate powder streams can be mixed in a frustoconical or conical mixer prior to delivery to the substrate surface. Also disclosed are methods of texturizing the substrate surface by moving the substrate or nozzle(s) during the delivery of dopant(s). Methods for achieving a uniform distribution of dopant are also described. Also disclosed herein are coaxial nozzle configurations having an outer focusing stream to converge and/or mix with an inner particle stream.

Abstract: A nozzle and method of providing CO2 for cleaning includes providing a CO2 flow; phase transferring the CO2 flow into gaseous CO2 and CO2 pellets; interrupting the CO2 flow with a screen member; retaining the CO2 pellets of a select larger size upstream of the screen member; permitting the CO2 pellets of a select smaller size to pass through the screen member for cleaning.

Abstract: A system and a method for removing a coating from a substrate. The system provides a compressed air source, a heated water source, a particulate cleaning medium source, and a mixing valve including an air input, a water input, and a particulate cleaning medium input. The inputs are positioned on the valve so that the water input is positioned downstream of the compressed air input, and the particulate cleaning medium input is positioned downstream of both the compressed air and water inputs. The method of mixing the air, water, and particulate cleaning medium provides a coating removal mixture having a volumetric ratio of air to water of at least 100:1 and a volumetric ratio of air to particulate cleaning medium of at least 70:1.

Abstract: A blasting device includes a flow passage (14) for a carrier gas, the flow passage (14) forming a blasting nozzle (12) at its downstream end, and a supply line (22) for liquid CO2, the supply line opening out into an expansion chamber (26) that is coaxially accommodated in the flow passage (14), the expansion chamber (26) being formed by a pipe (20) that is held at its upstream end by a holder' (18) which is passed by the flow of carrier gas in the flow passage, and in that the supply line (22) extends through the holder (18) in transverse direction of the flow passage and opens into an expansion valve (24) that extends in parallel with the axis of the flow passage (14).

Abstract: A nano grinding and dispersing assembly has a raw material feeder, a liquid supply unit connecting to the delivering pipe of the raw material feeder, a gas supply unit connecting to the delivering pipe of the raw material feeder, a pressure equalized assembly and a subsequent treatment plant. The raw material feeder has a feeding pipe connecting to the raw material feeder and a delivering pipe connecting to the raw material feeder. The pressure equalized assembly has a pressure equalizer, a pressurized feeding pipe, a gas-liquid separator, a pressure gage and a first grinding device. The first grinding device connects and communicates with the pressure equalizer and has at least one ground fluid outlet. The subsequent treatment plant connects the ground fluid outlet of the first grinding device. Therefore, the present invention completely mixes, grinds and disperses fluid to make the fluid homogeneous.

Abstract: An abrasive blaster system includes a storage tank for storing dry granular abrasive media, a source of pressurized air and a metering valve for mixing the granular abrasive media with the pressurized air for release through a blast nozzle. A cooling system is in line with the source of pressurized air for cooling the air received from the source before it is introduced to the metering valve, whereby cooled air is introduced into the metering valve. The system also includes a dryer system downstream of the cooling system and adapted for selectively receiving a portion of the cooled air for further drying it. The dryer system is in communication with the storage tank, whereby cooled, dry air is introduced into the storage tank.

Abstract: A micro-abrasive blasting device and method for perturbation control using a plurality of delivery conduits of various lengths and/or apertures. The user is able to individually open and close bypass conduit pinch valve(s) external to micro-abrasive blasting device to affect the perturbation intensity internal to the mixing chamber. By selectively opening and closing flow through delivery conduits it is possible to provide a more consistent perturbation rate and select the perturbation intensity internal to mixing chamber.

Abstract: A profile cutting apparatus comprising: a cutting head supporting a nozzle through which a cutting medium passes, and at least two drives that drive the cutting head to tilt relative to a vertical axis while driving the cutting head to rotate about the vertical axis, wherein the tilt of the cutting head is achieved by the relative difference in motion between the two drives.

Abstract: Disclosed herein is a containment system for a blasting device to prevent release of resulting particulate material into the environment. The system comprises a blasting device having at least one fluid jet nozzle for delivering a stream of particles under pressure toward a substrate positioned on a supporting platform. The containment is a plastic, flexible container having openings penetrated by the at least one fluid jet nozzle and supporting platform. The openings are sealably attached to the blasting device to isolate the interior of the container and the device from the outer environment.

Abstract: A method of removing a coating, such as paint, varnish, biological growth or grime, from a surface, the method comprising selecting a suitable particulate solid having a particular, size of from 150-250 mm and a fluid carrier to form a spray mixture and spraying the mixture as a jet spray so as to impact and at least partially remove the coating. The hardness of the particulate solid is less than 8.0 on the Moh scale. The pressure applied to the spray mixture to generate the spray is from 3.sub.x 10.sup.5 to 1.5.sub.x 10.sup.6 Nm.sup.-2. An apparatus comprising a blasting pot (1) and a compressor (2) to generate the spray mixture and propel it from a nozzle (5) is also disclosed. Heating may be applied to the carrier, either prior to or when mixing with the particulate solid.

Abstract: An apparatus for generating and manipulating a high-pressure fluid jet includes an assembly coupled to a motion assembly that imparts motion to the assembly along one or more axes. The motion assembly includes two motors coupled together to form a gimbal wrist, each motor having an axis of rotation. The two axes of rotation of the two motors can be perpendicular to each other, but are not necessarily aligned with the manipulator's axes of motion. The high-pressure fluid assembly incorporates a swivel that can rotate about two axes which may be parallel to the two motors' axes of rotation, allowing the high-pressure tubing contained therein to follow the motion imparted by the gimbal wrist of the motion assembly.

Abstract: A fluid jet assembly includes a non-pressurized lance barrel through which a high pressure hose (“a lance hose”) is threaded and anchored at the distal end of the lance barrel relative to an operator's position. The other end of the lance hose is coupled to a high pressure fluid source. The fluid is fed into the lance hose and transported to the output of the lance barrel, where it is discharged as a fluid jet stream. A nozzle is mounted at the output of the lance barrel to control the characteristics of the fluid jet flowing out of the lance hose. When infused with an abrasive material, the fluid jet stream exits the nozzle in a focused jet capable of cutting through most structural surfaces.

Abstract: A fluid jet system providing a hydraulic induction manifold for at least two valves. The manifold is positioned “upstream” of an abrasives holding tank, so that no abrasive material flows through the valves and the manifold. The valves and the manifold provide pressurized fluid for at least two different flows: (1) a primary fluid flow and (2) an abrasive material flow through the abrasives holding tank. The two flows are merged again at a junction to provide a fluid flow having a predetermined abrasive-to-fluid mixture ratio. The manifold balances the pressure of the two different flows using a preset geometric relationship between the two different output flow paths associated with the valves.

Abstract: A method of machining a blade retention slot with an abrasive water jet machining. A straight blade retention slot along an X-axis then a at least one side of the straight blade retention slot is abrasive water jet machined to generate a curved side of the blade retention slot defined within an X-Y plane.

Abstract: A spinner wheel housing (100) comprises an outer housing (10) having at least one covering element (15), at least one bottom element (16), two front wall elements (11, 12) and two trapezoidal lateral wall elements (13, 14) which are arranged at a distance from each other and encompassed by the front wall elements. At least one of the lateral wall elements (13, 14) has a recess for receiving a guiding sleeve. A guiding sleeve cover (40) is pressed against this lateral wall element (14) by means of at least three clamping claw devices (50) which are fixed to the lateral wall element next to the recess for receiving the guiding sleeve and/or a bottom support element (16). The bottom element is connected to a base support element (17) by means of a plurality of clamping claw devices (70). The base bearing element is adapted to be fixed to a blasting compartment or a foundation.

Abstract: The invention relates to a device for accelerating abrasives, comprising a centrifugal wheel (8) that is driven to rotate about an axis of rotation. Said centrifugal wheel further comprises blades (2) that are disposed in a substantially radial orientation relative to the axis of rotation, and a lateral disk (4) on which the blades (2) are retained with a lateral edge. A feed line (6) for the abrasive has an opening (7) that is contiguous with the free edges of the blades (2) of the centrifugal wheel (8) outside the axis of rotation of said centrifugal wheel (8). The inventive device is further characterized in that the blades (2), on the side facing the feed line (6), have recesses (3) that are opposite the opening (7) of the feed line (6).

Abstract: A cutting apparatus includes a fixing table where a position of an encapsulated body that is an example of a workpiece is fixed, and a nozzle from which an abrasive waterjet containing abrasive grains for cutting the encapsulated body is sprayed out. The fixing table includes a plurality of protrusions and a plurality of bases. Each of the plurality of protrusions is partitioned by a groove so as to correspond to a plurality of package products subsequent to cutting of the encapsulated body, and includes a through hole to draw in by suction the encapsulated body or one of the plurality of package products. Each of the plurality of bases links protrusions together aligned along at least one direction among the plurality of protrusions. A region of the plurality of protrusions or the plurality of bases against which the abrasive waterjet collides is formed of a material higher in hardness than the abrasive grains.

Abstract: A particle blast apparatus has a particle generator the speed of which is synchronized with the speed of the feeder which introduces particles into the flow of transport gas.

Abstract: The invention relates to a peening chamber for surface peening, in particular for ultrasonic shot peening of gas turbine components (10), which, at least with a component region (20) comprising the surface to be treated, are to be arranged within a chamber wall (12), which spatially defines the peening chamber, wherein at least one wall region (26, 36, 48) of the chamber wall (12) is designed to be adjustable in order to vary the geometry of the peening chamber.

Abstract: An apparatus for generating and manipulating a high-pressure fluid jet includes an end effector assembly coupled to a manipulator that imparts motion to the end effector. The end effector assembly includes a cutting head coupled to a source of high-pressure fluid and to a source of abrasive. A motion assembly is coupled to the cutting head via a clamp positioned around the cutting head. A nozzle body assembly is removably coupled to the cutting head assembly, which may be separated from the cutting head assembly to allow access to the orifice, without removing the cutting head assembly from the clamp. The clamp has a quick release mechanism and an alignment member. The motion assembly includes two motors coupled together to form a gimbal wrist, each motor having a horizontal axis of rotation. The two axes of rotation are perpendicular to each other, but are not necessarily aligned with the manipulator's axes of motion.

Abstract: The invention relates to fluid jet polishing machine including a pump that maintains a constant pressure in the polishing fluid during each pass of a nozzle over a component. Fluid actuated diaphragms expand and contract the volume of a pair of pump chambers, thereby eliminating the need for high-speed shafts or components in contact with the abrasive slurry.

Abstract: An abrasivejet cutting head assembly comprises abrasive inlet means for permitting entry of abrasive material into the head's longitudinally-extending passageway about an inlet axis that is preferably non-intersecting with the passageway's longitudinal axis. The abrasive is then prevented from entrainment into the waterjet by means within the passageway that only permits entrainment downstream from the region of abrasive entry after the abrasive particles have attained a generally coherent downstream velocity. The foregoing can be accomplished within the cutting head, within a user-replaceable insert in the cutting head or within the abrasivejet nozzle.

Abstract: The invention relates to fluid jet polishing machine including a pump that maintains a constant pressure in the polishing fluid during each pass of a nozzle over a component. Fluid actuated diaphragms expand and contract the volume of a pair of pump chambers, thereby eliminating the need for high-speed shafts or components in contact with the abrasive slurry.

Abstract: Fluid jet polishing (FJP) is a method of contouring and polishing a surface of a component by aiming a jet of a slurry of working fluid from a nozzle at the component and eroding the surface to create a desired shape. During erosion, the end of the nozzle and the component are submerged within the working fluid, whereby air is not introduced into the closed loop of working fluid slurry. Any bubbles that are present in the system simply bubble to an air pocket at the top of the erosion chamber and are not re-circulated, thereby producing surfaces with very smooth surface finishes.

Abstract: The present invention provides a method of handling abrasive solids materials used in an abrasive cutting procedure which jets a high-pressure abrasive slurry through a nozzle (7) onto a work piece over and/or in a catcher tank (8). This handling method includes catching the used abrasive slurry together with work piece kerf material in the catcher tank, and passing at least some abrasive solids collected in the catcher tank as a slurry to a partitioning apparatus which includes a vibratory sieve (27). The handling method also includes partitioning the slurry with the partitioning apparatus in order to provide at least two solids streams. One of the solid streams passes through the sieve and the other passes across the sieve whilst entrained as a slurry. The handling method further includes passing as a slurry to the nozzle (7) for jetting a pressurised or pressurisable slurry that has partitioned solids stream which has passed through the sieve (27).

Abstract: The present invention provides a method of handling abrasive solids materials used in an abrasive cutting procedure which jets a high-pressure abrasive slurry through a nozzle (7) onto a work piece over and/or in a catcher tank (8). This handling method includes catching the used abrasive slurry together with work piece kerf material in the catcher tank, and passing at least some abrasive solids collected in the catcher tank as a slurry to a partitioning apparatus which includes a vibratory sieve (27). The handling method also includes partitioning the slurry with the partitioning apparatus in order to provide at least two solids streams. One of the solid streams passes through the sieve and the other passes across the sieve whilst entrained as a slurry. The handling method further includes passing as a slurry to the nozzle (7) for jetting a pressurised or pressurisable slurry that has partitioned solids stream which has passed through the sieve (27).