The portable apparatus for cleaning surfaces comprises a tank (2) associated with a base (3), said tank (2) comprising at least one couple of chambers (5) predisposed to contain respective abrasive materials, said chambers (5) being hermetically separated from one another; at least one couple of mixing valves (13) associated with said base (3) and connected with respective said chambers (5) each said mixing valve (13) being predisposed to receive said abrasive material contained in said respective chamber (5) and to mix said abrasive material with a predetermined amount of compressed air.

A pneumatically operated shot peening or blasting machine is designed to be convenient and mobile to be used to treat newly cut threads of oil tools in a contained and controlled manner. The machine uses compressed air and electric power to spray tiny Carbon Steel or Stainless Steel round balls to impart small indentation on the surface of the threads, or to clean and remove material from the surface of the tool. The indentations in shot peening puts the metal surface in compression creating stress zone and plastic deformation to relieve fatigue and prevent premature fractures and stress corrosion cracking. The inventive machine is designed to follow Shot Peening Standards such as MILS-13165B, J441, and AMS 2430 or other standards as apply.

The present application provides to a media dosage unit (300) for shot peening. The application also presents methods of using and making the media dosage unit. The media dosage unit comprises a flow sensor (304) for measuring flow rate of solid particles; and a connector on the flow sensor for coupling the flow sensor to a shot circulation conduit (306). The present application also relates to a media flow valve (316) for the media dosage unit for shot peening. The application additionally discloses a method of making or assembling the microwave media flow sensor.

The present disclosure relates to abrasive material delivery systems for liquid jet cutting systems. The abrasive material delivery systems can include a valve configured to adjust an inflow of abrasive material into the abrasive material delivery system from a source of abrasive material. The systems can include a chamber downstream of the valve and configured to receive the inflow of abrasive material from the valve. The systems can include a metering component configured to control an outflow of abrasive from the chamber to a cutting head of the liquid jet cutting system. In some embodiments, the systems include a sensor configured to monitor movement of a top surface of a portion of abrasive material within the chamber as the top surface moves through the chamber; and a processing device operably connected to the sensor and configured to determine an abrasive flow rate through the metering component based on a speed of the top surface as monitored by the sensor.

A particle blast apparatus or system entrains blast media particles from a particle source into a transport fluid which already has blast media particles entrained therein. The system may have, prior thereto, entrained blast media particles into the transport fluid which at that time did not already have blast media particles entrained therein. The particle types may be dissimilar, such as dry ice particles and abrasive media particles.

A valve with permanent magnet(s) and electro-magnet coils magnetically coupled to the permanent magnet(s). The valve is positioned below an inlet for receiving media. The amount of media flow may be regulated by controlling the current to the coils for partial or full flow. With no power applied to the electro-magnet coils, the media flow is inhibited. Application of a current to the electro-magnet coils will block the flux in the pole pieces rendering the working gap free of magnetic flux and thus allowing media to freely flow. As it is used, the media may become magnetized, altering the flow properties and causing magnetized media to bridge across the working gap. A magnetic sensor detects the amount of flux in the working gap to provide a signal to a control system. The signal allows closed loop control of the coils as media becomes magnetized, allowing consistent flow properties during use.

A universal adapter includes a main tube for a combined suction unit and blasting unit. The main tube has a first connecting section for connection to a suction line of the suction unit and a second connecting section for connection to a working chamber. In order to reduce the number of suction adapters needed to connect to different openings in working chambers, the second connecting section is made of a flexible material and has a cutout in its periphery that extends from a free end of the second connecting section in the direction of the longitudinal axis of the main pipe.

The portable apparatus for cleaning surfaces comprises a base (3); a tank (2) associated with said base (3) at the top thereof, said tank (2) being predisposed to contain at least one abrasive material. At least one mixing valve (9) is associated with the base (3) and connected with said tank (2) so as to receive said abrasive material contained in said tank (2) and mix said abrasive material with a predetermined amount of compressed air. An adjusting member (11) is associated with the tank (2), said adjusting member (11) being predisposed to enable the selection of a predetermined value indicating the amount of said abrasive material to be mixed with said compressed air in said at least one mixing valve (9).

An apparatus and method for generating ice pellets, in particular for controlling the properties of the generated ice pellets. The apparatus comprises a pellet generation region; at least one nozzle configured to supply a plurality of water droplets to the pellet generation region; a liquefied gas supply configured to deliver a liquefied gas to the pellet generation region to thereby freeze the water droplets to generate a plurality of ice pellets; at least one temperature measuring device configured to obtain data indicative of the temperature of the ice pellets at generation; and a control system configured to adjust the flow rate of water and/or liquefied gas to thereby control the temperature of the ice pellets at generation.

A sand blaster is provided that includes an engine carried by an engine mounting plate. A frame is included and an engine support isolator engages the frame and carries the engine mounting plate. The engine support isolator has a stud that extends through a first coil and a stud guide that has a tapered inner surface. The stud extends through the stud guide. In other arrangements an air regulator that is adjustable is provided, and a nozzle that features reduced wear is provided.