A compressed air foam (CAF) mixing device is suitable for use in a CAF system that includes a pressurized source of a water soap mixture and a pressurized air source. The CAF mixing device includes an inlet portion, a venturi portion and a deceleration portion. The venturi portion communicates with the inlet portion and includes a constricted zone which presents a smaller cross sectional area than the inlet portion. The venturi portion opens into the deceleration portion that has a substantially larger cross sectional area than the venturi portion. At least one pressurized air conduit communicates with the pressurized air source and is arranged to be adjacent to the deceleration portion. At least one aperture communicates between the pressurized air conduit and the deceleration portion and introduces high pressure air into the deceleration portion in order to produce a water soap foam (CAF) suitable for firefighting.

A system for applying an adhesive includes an air flow path for conveying compressed air and an adhesive flow path for conveying liquid adhesive. The system includes an air heater coupled to the air flow path and configured to heat the compressed air and a liquid adhesive heater coupled to the adhesive flow path and configured to heat the liquid adhesive. The system also includes an applicator positioned downstream from the air and liquid adhesive heaters. The applicator is configured to receive the liquid adhesive from the adhesive flow path and the compressed air from the air flow path. The applicator is further configured to spray the liquid adhesive from the applicator using the compressed air.

The invention relates to an atomizer nozzle (10) with a liquid channel (19) which communicates downstream with an annular mixing chamber (26). A liquid (F) is supplied to the liquid channel (19) via a liquid connection (12). The atomizer nozzle (10) additionally has a gas connection (13) which is connected to a gas line system (28). Pressurized gas (L) is conducted to an outer injection channel (29) and an inner injection channel (34) via the gas line system. Each of the two injection channels (29, 34) opens into the annular mixing chamber (26) at a respective injection point (30, 35). The outer injection point (30) is provided on a radially outer mixing chamber wall, and the inner injection point (35) is provided on a radially inner mixing chamber wall. The inflowing liquid can thus be finely atomized using little pressurized gas (L) in the annular mixing chamber (26) and dispensed downstream of the annular mixing chamber via at least one outlet opening (40) in the form of a spray jet (S).

A valvular conduit, preferably a Tesla valvular conduit, in which a plug member is coaxially received within a bore in a sleeve member and in which passageways are defined between the plug member and the sleeve member within interior walls configured to permit mixing of fluid flowing through the passageways in at least one direction, preferably, the relatively free passage of fluid through the passageways upstream but increased the resistance to downstream flow of the fluid through each passageway.

An apparatus for creating solid or liquid nanoparticles having a nozzle to create a first particle size from a bulk liquid flow that is in fluid communication with a gas flow amplifier comprising an inlet cone connected to and in fluid communication with the inlet of a cylindrical housing; a diffuser connected to and in fluid communication with the outlet of said housing; and said housing comprising at least two rings of ports disposed of along a circumference of the cylindrical housing; and a means to inject compressed gas into the housing through said ports.

The present invention provides, inter alia, an apparatus for generating a mist. The apparatus includes (a) a first transport fluid passage having a first transport fluid inlet, a first transport fluid outlet, and a throat portion intermediate the first transport fluid inlet and the first transport fluid outlet, the throat portion having a cross sectional area which is less than that of either the first transport fluid inlet or the first transport fluid outlet; (b) at least one working fluid passage located radially outwardly of the first transport fluid passage and having a working fluid inlet and a working fluid outlet; (c) at least one second transport fluid passage having a second transport fluid inlet and a second transport fluid outlet in fluid communication with the working fluid passage; and (d) an outlet nozzle in fluid communication with the first transport fluid and working fluid outlets, wherein the second transport fluid passage has an outlet located in the working fluid passage upstream of the working fluid outlet. Systems and methods of generating a mist using such an apparatus are also provided. Methods for fire suppression and decontamination using such an apparatus are further provided. Mists generated using such an apparatus are further provided.

The invention relates to a nozzle device (100) for producing a three-dimensional component made of a material, in particular a shotcrete component made of concrete, a material application system (1), a manufacturing system (200) and a method for producing a three-dimensional component made of a material, in particular a shotcrete component made of concrete. In particular, the invention relates to a nozzle device (100) for producing a three-dimensional component made of a material, in particular a shotcrete component made of concrete, comprising a nozzle unit (101) with a material guide (102), which has a material inlet (104) for introducing a material, in particular a concrete, and a nozzle element (106) fluidically coupled to the material inlet (104) for applying the material, in particular the concrete, which is preferably arranged replaceably on the nozzle unit (101).

A valvular conduit, preferably a Tesla valvular conduit, in which a plug member is coaxially received within a bore in a sleeve member and in which passageways are defined between the plug member and the sleeve member within interior walls configured to permit mixing of fluid flowing through the passageways in at least one direction, preferably, the relatively free passage of fluid through the passageways upstream but increased the resistance to downstream flow of the fluid through each passageway.

A foam dispenser with a pump mechanism that mixes a liquid with air to generate foam. The pump mechanism includes a first stage pump and a second stage pump. The first stage pump delivers the liquid and a first volume of the air through a first foam generator to generate a first foam. The second stage pump delivers the first foam and a second volume of the air through a second foam generator to generate a second foam.

A foam dispenser with a pump mechanism that mixes a liquid with air to generate foam. The pump mechanism includes a first stage pump and a second stage pump. The first stage pump delivers the liquid and a first volume of the air through a first foam generator to generate a first foam. The second stage pump delivers the first foam and a second volume of the air through a second foam generator to generate a second foam.