A hydrodynamically optimised mixer module to be coupled to a deterministic hydrodynamic tool for pulsed polishing of optical surfaces, which is arranged such that the supply of abrasive foam or fluid may be interrupted without impairing the operational stability of the polishing process and of the hydrodynamic tool. The mixer module includes at least one interrupter element for interrupting high-velocity fluids; a first inlet through which air is injected under pressure and in a controlled manner; a second inlet through which a polishing fluid is injected in a controlled manner, said polishing fluid filling a previously calculated space with an optimised hydrodynamic shape and being transferred to a mixing zone where, together with the pressure-injected air, the abrasive foam is produced that is injected into a module of at least one rotational acceleration chamber of the hydrodynamic tool.

An abrasive blasting system that includes a blast hose; and a deadman assembly operably coupled therewith for controlling discharge out of the blast hose. The deadman assembly has a position of either a signal-flow or a no-flow position. When engaged to the signal-flow position, a burst or pulse of purge air is transferred to a mixer via a water injection conduit.

An abrasive head with inserted jet for cleaning/removing material surfaces and splitting/cutting materials by a liquid beam enriched with solid abrasive particles to extend the tool lifetime by eliminating damage to the liquid jet's aperture by the abrasive, avoid degrading the abrasive inside the tool and increase the cutting power and flow efficiency.

Fluid jet cutting systems, components and related methods for generating relatively low load abrasive fluid jets that are particularly well suited for cutting fragile, brittle or otherwise sensitive materials are provided. An example method includes supplying fluid at an operating pressure of at least 60,000 psi to an orifice having a circular cross-sectional profile with a diameter that is less than or equal to 0.010 inches to create a fluid jet that leaves a fluid jet cutting head through a jet passageway having a circular cross-sectional profile with a diameter that is less than or equal to 0.015 inches.

An abrasive blasting system has an abrasive container or pot, preferably with a downwardly conically shaped interior bottom surface. A slurry delivery tube is positioned within the pot, with an open bottom end positioned at an operative distance above the bottom of the pot. The slurry delivery tube runs vertically upward and exits the pot, ultimately running to a hose and nozzle. With an abrasive slurry of solid particulate abrasive media and water inside the pot, air pressure is applied within the pot. When a relatively lower pressure is created in the slurry delivery tube, the resulting pressure differential moves the slurry downward within the pot, then upward through the slurry delivery tube, through the hose and ultimately to the nozzle, where it is directed by an operator onto a workpiece. The system is especially useful when using very fine abrasive material.

An apparatus for blasting having a distribution block for receiving a blasting medium, a pressure medium and/or a fluid/liquid medium, said distribution block having an outlet connectable with at least one distributing tube.

A vapor abrasive blast system includes a pump for pumping a water stream to a pressure vessel for pressurizing the pressure vessel to a pot pressure. A water regulator is disposed to regulate the water stream to a fixed water pressure, such that the water stream entering the pressure vessel has the fixed water pressure. The pressure vessel contains a blasting mixture, comprising an abrasive media and water, for introduction to a compressed air stream and application to a substrate. The water entering the pressure vessel has the fixed water pressure to control the pot pressure. The water regulator is configured to output the water stream such that the fixed water pressure is greater than a compressed air pressure in the compressed air stream.

An abrasive media blaster assembly includes a container to hold at least one abrasive media, an external air source to provide a compressed air supply, a reservoir to hold water and rust inhibitor solution and a venturi blaster gun. The venturi blaster gun comprises an exterior nozzle, a media blaster block and a trigger with a handle. The fittings in the media blaster block create a venturi effect and draw the water and rust inhibitor solution so as for it to mix with the abrasive media where the dustless blaster sprays the mix to remove surface finishes from a metal surface and simultaneously provides a rust inhibitor to the surface, thereby allowing the device to be capable of performing any one, two or all of dry media blasting, slurry blasting, and water blasting.

An abrasive media blaster assembly includes a container to hold at least one abrasive media, an external air source to provide a compressed air supply, a reservoir to hold water and rust inhibitor solution and a venturi blaster gun. The venturi blaster gun comprises an exterior nozzle, a media blaster block and a trigger with a handle. The fittings in the media blaster block create a venturi effect and draw the water and rust inhibitor solution so as for it to mix with the abrasive media where the dustless blaster sprays the mix to remove surface finishes from a metal surface and simultaneously provides a rust inhibitor to the surface, thereby allowing the device to be capable of performing any one, two or all of dry media blasting, slurry blasting, and water blasting.

A vapor abrasive blast system includes a pump for pumping a water stream to a pressure vessel for pressurizing the pressure vessel to a pot pressure. A water regulator is disposed to regulate the water stream to a fixed water pressure, such that the water stream entering the pressure vessel has the fixed water pressure. The pressure vessel contains a blasting mixture, comprising an abrasive media and water, for introduction to a compressed air stream and application to a substrate. The water entering the pressure vessel has the fixed water pressure to control the pot pressure. The water regulator is configured to output the water stream such that the fixed water pressure is greater than a compressed air pressure in the compressed air stream.