A removable insert and a spray nozzle which includes the removable insert and a nozzle cap. The removable insert has a base member and a protruding member. The nozzle cap has an annular flange which delimits an interior locating surface for the insert. The flange extends radially and ends with an internal extremity which defines a planar spray opening. When in use, the base member is housed within the nozzle cap whilst the protruding member projects outwardly and stands proud of the planar spray opening.

A removable insert and a spray nozzle which includes the removable insert and a nozzle cap. The removable insert has a base member and a protruding member. The nozzle cap has an annular flange which delimits an interior locating surface for the insert. The flange extends radially and ends with an internal extremity which defines a planar spray opening. When in use, the base member is housed within the nozzle cap whilst the protruding member projects outwardly and stands proud of the planar spray opening.

A method for plasma coating an object includes an object profile, having the steps of: a) manufacturing a replaceable shield comprising a jet inlet, a nozzle outlet and a sidewall extending from the jet inlet to the nozzle outlet, wherein the nozzle outlet includes an edge essentially congruent to at least part of the object profile; b) detachably attaching the replaceable shield to a jet outlet of a plasma jet generator; c) placing the object at the nozzle outlet such that the object profile fits closely to the nozzle outlet edge; d) plasma coating the object with a low-temperature, oxygen-free plasma at an operating pressure which is higher than the atmospheric pressure by providing a plasma jet in the shield via the plasma jet generator and injecting coating precursors in the plasma jet in the shield.

A method for plasma coating an object includes an object profile, having the steps of: a) manufacturing a replaceable shield comprising a jet inlet, a nozzle outlet and a sidewall extending from the jet inlet to the nozzle outlet, wherein the nozzle outlet includes an edge essentially congruent to at least part of the object profile; b) detachably attaching the replaceable shield to a jet outlet of a plasma jet generator; c) placing the object at the nozzle outlet such that the object profile fits closely to the nozzle outlet edge; d) plasma coating the object with a low-temperature, oxygen-free plasma at an operating pressure which is higher than the atmospheric pressure by providing a plasma jet in the shield via the plasma jet generator and injecting coating precursors in the plasma jet in the shield.

A common head for use in combination with a cartridge assembly, the cartridge assembly being retained within the material containment unit of a dispensing device and arranged to discharge reactive components from larger and smaller cartridges in response to actuation of the dispensing device. The common head includes inlet openings and a rigid walled tube having a partition positioned therein to define larger and smaller pathways to enable passage of the reactive components from the cartridges into and though the common head in a predetermined volumetric ratio and prevent backflow of the components which can lead to unintended curing prior to dispensing. A flexible liner arranged for positioning within one or both pathways of the rigid walled tube is also provided to prevent such backflow and unintended curing prior to dispensing.

A common head for use in combination with a cartridge assembly, the cartridge assembly being retained within the material containment unit of a dispensing device and arranged to discharge reactive components from larger and smaller cartridges in response to actuation of the dispensing device. The common head includes inlet openings and a rigid walled tube having a partition positioned therein to define larger and smaller pathways to enable passage of the reactive components from the cartridges into and though the common head in a predetermined volumetric ratio and prevent backflow of the components which can lead to unintended curing prior to dispensing. A flexible liner arranged for positioning within one or both pathways of the rigid walled tube is also provided to prevent such backflow and unintended curing prior to dispensing.

An apparatus, system, device, and the like, for a liquid nitrogen dispensing head that may be used in a system for cooling aggregate, such as may be found in a batch plant involved in producing concrete. The dispensing head is positioned over a conveyor belt that conveys aggregate to a mixing apparatus to produce concrete. The head dispenses liquid nitrogen onto the aggregate to cool the aggregate and may include interior chambers separated by one or more baffles. The chambers may reduce the pressure of the liquid nitrogen onto the aggregate in relation to the flow pressure of the liquid nitrogen entering the dispensing head. In another example, an assembly may include sidewalls that extend to the aggregate on either side of the head to form a cooling tunnel through which the aggregate is conveyed and is exposed to the liquid nitrogen being dispensed from the head.

A gas nozzle according to the present disclosure includes a supply hole having a tubular shape and configured to guide a gas and an injection hole connecting to the supply hole. The gas nozzle configured to inject the gas from the injection hole is made from ceramics or single crystal including an oxide, a fluoride, or an oxyfluoride of a rare earth element or an yttrium aluminum composite oxide as a primary component. An arithmetic mean roughness Ra of an inner circumferential surface forming the supply hole is smaller on an outflow side than on an inflow side of the gas.

The invention relates to an abrasive wateget cutting system (2) including: an abrasive watcrjct cutting head (14) comprising: a nozzle (16) adapted for guiding an abrasive wateget (6) intended to cut a metallic workpiece (4); an abrasive wateget flow direction (12); a monitoring device (28) including at least an upstream sensor and a downstream sensor which are distributed along the abrasive wateget flow direction (12) downstream the inlet end of the nozzle (16), and which are adapted for measuring at least one wear characteristic of the nozzle (16) or a characteristic of the abrasive wateget (6), or an alignment characteristic of the nozzle (16) with an orifice (18). The sensors comprise a set of accelerometers (40; 42) and a set of microphones (44; 46). The wear monitoring device (28) being configured to monitor at least one characteristic of the abrasive wateget cutting system (2) through at least the upstream sensor and the downstream sensor.

A spray nozzle assembly for directing thin, straight line, high pressure liquid spray onto moving steel slabs for penetrating and removing scale buildup in steel processing operations. The spray nozzle assembly includes a liquid inlet defined by an upstream strainer and a downstream high impact attachment tube for accelerating liquid flow. A one-piece multi-stage liquid straightening vane segment is disposed within a central liquid flow passage of the nozzle assembly for more effectively reducing liquid turbulence of the high pressure liquid flow with resultant improved control in the tightness of the thin, flat spray panner. The one-piece vane segment further is adapted for efficient assembly and replacement in the spray nozzle assembly without the need for handling and precise alignment of a plurality of individual vane elements.