An extinguishing fluid nozzle system (1, 100, 200), for stationary fire extinguishing systems, with an extinguishing fluid nozzle having a main body (3, 104, 204) which has an inlet opening (23, 123, 223) and can be fixed in fluid-conducting relationship to an extinguishing fluid line, a nozzle head (5, 106, 206) which has one or more outlet openings (25, 125, 225) connected in fluid-conducting relationship to the inlet opening for the discharge of the extinguishing fluid, and an aperture (7, 107, 207) having an aperture ring (15, 115, 215) for flow limitation, arranged in the fluid path between the inlet opening and the one or more outlet openings. The aperture has a grip portion (17, 117, 217) which is fixedly connected to the aperture ring and which extends outwardly from the aperture ring and which in the fitted condition of the aperture extends outside the extinguishing fluid nozzle.

A firefighting apparatus can include a system that applies a fire retardant material to provide a temporary fireproof and/or fire retardant coating to vegetation, structures and/or flammable materials. The apparatus can include a high-capacity tank with an integral, internal agitator to mix liquid therein with a fire retardant polymer, such as a superabsorbent polymer, to produce a fire retardant coating material. The apparatus can include an upper deck to store bales of polymer and an access panel to load bales into the tank for continuous production of the coating material. Primary and secondary pumps can selectively pump the coating material in stationary and/or moving modes. The apparatus can be NFPA 1901 compliant and can operate as a fire truck or vehicle. Optionally, the system can include a venturi to mix the polymer with liquid to produce the coating material. Related methods of use are provided.

A firefighting apparatus can include a system that applies a fire retardant material to provide a temporary fireproof and/or fire retardant coating to vegetation, structures and/or flammable materials. The apparatus can include a high-capacity tank with an integral, internal agitator to mix liquid therein with a fire retardant polymer, such as a superabsorbent polymer, to produce a fire retardant coating material. The apparatus can include an upper deck to store bales of polymer and an access panel to load bales into the tank for continuous production of the coating material. Primary and secondary pumps can selectively pump the coating material in stationary and/or moving modes. The apparatus can be NFPA 1901 compliant and can operate as a fire truck or vehicle. Optionally, the system can include a venturi to mix the polymer with liquid to produce the coating material. Related methods of use are provided.

A wall-mountable spray head unit (11) is described. The spray head unit includes a rotatable spray head assembly (8.sub.1, 8.sub.2; FIG. 9, 8.sub.3; FIG. 17) which comprises a spray manifold (18.sub.1, 18.sub.2; FIG. 9) rotatable about a first axis (17), a spray nozzle (19) supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane in a plane defined by the first axis and a second axis which is perpendicular to the first axis, and at least one thermal sensor (20).

A wall-mountable spray head unit (11) is described. The spray head unit includes a rotatable spray head assembly (8.sub.1, 8.sub.2; FIG. 9, 8.sub.3; FIG. 17) which comprises a spray manifold (18.sub.1, 18.sub.2; FIG. 9) rotatable about a first axis (17), a spray nozzle (19) supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane in a plane defined by the first axis and a second axis which is perpendicular to the first axis, and at least one thermal sensor (20).

Disclosed are a fire extinguishing system and method for an ultra-high voltage (UHV) converter station, and a UHV converter station. The fire extinguishing system includes a spray fire extinguishing system and a fire monitor-based fire extinguishing system, where the spray fire extinguishing system includes a first fire pipe and a spray pipe; the fire monitor-based fire extinguishing system includes a second fire pipe and a fire monitor; one fire monitor is disposed right above a firewall on both sides of each converter transformer in the UHV converter station, and each fire monitor is connected to one second fire pipe; a spray pipe is disposed on the firewall on both sides of each converter transformer; and the fire monitor corresponding to each converter transformer, and an outlet of the spray pipe connected to the first fire pipe corresponding to each converter transformer face the converter transformer.

A backpressure booster for a nozzle assembly for a firefighting apparatus is disclosed. The backpressure booster includes a housing, a flow restrictor within the housing, and flow conditioner within the housing and positioned downstream from the flow restrictor, where the flow conditioner is configured to direct fluid radially outward towards an inner surface of the housing.

A backpressure booster for a nozzle assembly for a firefighting apparatus is disclosed. The backpressure booster includes a housing, a flow restrictor within the housing, and flow conditioner within the housing and positioned downstream from the flow restrictor, where the flow conditioner is configured to direct fluid radially outward towards an inner surface of the housing.

A nozzle includes an inlet end having one or more inlet apertures and an outlet end having one or more outlet apertures. The nozzle includes a body member that extends between the inlet end and the outlet end. In some embodiments, the nozzle includes a central member that extends centrally through the body member. The nozzle includes an end member fixedly coupled with the central member at the outlet end. The nozzle includes a slidable member translatably coupled with the central member. The slidable member is configured to direct fluid that flows through the body member outwards towards an inner surface of the body member and translation of the slidable member adjusts a K-factor of the nozzle.

A nozzle includes an inlet end having one or more inlet apertures and an outlet end having one or more outlet apertures. The nozzle includes a body member that extends between the inlet end and the outlet end. In some embodiments, the nozzle includes a central member that extends centrally through the body member. The nozzle includes an end member fixedly coupled with the central member at the outlet end. The nozzle includes a slidable member translatably coupled with the central member. The slidable member is configured to direct fluid that flows through the body member outwards towards an inner surface of the body member and translation of the slidable member adjusts a K-factor of the nozzle.