The invention relates to a water extinguishing system (1) with a fluid supply (20), a pump (30) and a test line (40) with an opening element (2) which is configured to open the test line (40) during a test run of the pump (30). According to the invention, the test line (40) further comprises a closing element (4) which is configured to close the test line (40) if the water extinguishing system (1) is triggered.

Fire protection mist nozzles for industrial oil cookers, oil cookers with fire protection systems, and method of oil cooker fire protection are provided. The mist nozzles operate at pressures between 170 and 250 psi, and provide a unique distribution pattern that allows for variable installations for protection in certain operative environments including oil cookers with various hood configurations. The fire protection nozzles includes a base defining an inlet and an outlet along an axis. The base includes an orifice having an inlet diameter and an outlet diameter. The outlet diameter is preferably greater than the inlet diameter; and the orifice defines a K-factor of less than 1.0 gpm/psi½. The nozzle includes a diffuser aligned with the orifice. The diffuser has a preferably substantially domed portion with a maximum diameter that is less than the summation of the inlet diameter and the outlet diameter of the orifice.

An automatic nozzle for firefighting low-pressure water mist systems comprising a nozzle body and shutter means, said nozzle body comprising a plurality of axial-symmetric components defining an inlet opening and a plurality of inner cavities, which are fluid-dynamic connected each other by means of one or more openings, being said components configured to generate a radial spray through a circumferential opening, which extends all over the circumference of a second component, said circumferential opening being formed between a base of an annular board of the second component and an upper surface of a hollow body of a third component, and two or more full cone sprays by means of the fluid passage through cylindrical openings on a circular and axial-symmetric body of a fifth component, configured to define a turbulent motion of the fluid in at least two correspondent cylindrical cavities of a fourth component.

A fire-fighting appliance for distributing water droplets includes a rotating nozzle unit configured with nozzles distributed about the periphery of the nozzle unit, and a tubular element that is prepared for connection to a source of water for supply of water to the nozzles. Furthermore, the fire-fighting appliance includes a motor that is attached to the tubular element and is driven by the water pressure from the water source. The motor is rotatably connected to the nozzle unit and an adjusting device is provided for controlling the rotational speed of the motor for dispersing water droplets through the nozzles in a pulsating action.

A water station consisting of a large water tank or bag with a plurality of dangling appendages for lowering toward the ground. These appendages include heat sensors and sprayers, and one or more may be capable of connecting to a fire fighting truck, water tank, fire hydrants, or other pieces of equipment. One or more appendages may also include a bag containing fire-fighting safety gear or ground-based hoses for fighting fires. Cameras and other sensors provide constant feedback to the pilot of the aircraft, such as a helicopter, deploying the water station.

A water spraying fan for firefighting. The water spraying fan includes a fan mechanism mounted onto a rotatable surface attached to a base. The fan mechanism has a plurality of fan blades connected to a power source and adapted to rotate quickly, creating a strong air flow when powered on. A cage encloses the fan blades and includes one or more circular manifolds secured to a front side and positioned concentric to the fan blade axis. The manifolds contain a plurality of nozzles that are configured to disperse a liquid, such as water. The manifolds are connected to a water source via a flow control box. When activated, water flows out of the nozzles and is carried across an extended distance via the water pressure and the strong air flow created by the fan mechanism. The water spraying fan can be rotated or tilted to achieve optimal positioning.

Water mist fire protection systems and methods for the protection of data centers having a raised floor defining an interstitial space beneath the floor. The systems and methods include the location of a plurality of automatic water mist nozzles above and/or beneath the floor to generate a water mist for effectively addressing a fire in the presence of a flow of forced air ventilation through the interstitial space. The systems and methods of water mist fire protection include the interconnection of the automatic water mist nozzles to a water supply to provide for dry pipe or preaction systems and methods. Water mist fire protection of data centers using fire propagating cable is also provided.

A spray nozzle directs fluid forwardly, perpendicularly, and rearwardly angled from a fire hose to enhance spray distribution from a single piece nozzle. The spray nozzle includes a cylindrical body having an open end and a spray end. A plurality of apertures extends through the cylindrical body to expel fluid from the spray nozzle in a roughly spherical dispersal while atomizing the fluid to enhance firefighting capability.

A fire engine including a vehicle frame, a liquid nitrogen storage tank, a liquid nitrogen conveying pipeline, a gasification device, a plurality of electric valves, a water pipe adapter, a liquid nitrogen spray gun, and a mixed spray gun. The liquid nitrogen conveying pipeline includes a first pipeline and a second pipeline. The first pipeline connects the lower part of the liquid nitrogen storage tank, the gasification device, and the upper part of the liquid nitrogen storage tank sequentially in that order. The second pipeline connects the liquid nitrogen storage tank, an input end of the liquid nitrogen spray gun, and a first input end of the mixed spray gun. The mixed spray gun includes a first input end, a second input end, a liquid nitrogen nozzle, and a spray pipe. The spray pipe includes a contraction section, an expansion section, and an acceleration section.

The invention includes an air mover device used for fire mitigation and protection. The core component is an air mover unit whose discharge airstream can be positioned using air rudders and/or a directional control assembly to provide air flows in optimum directions and capacity to counter unwanted fire progression or to promote fires in cases of back-burns. Additional support components include a power supply, its fuel source, a speed control mechanism for the air mover, an air mover inlet protective screen, a sparger unit to impart suppressant or retardant into the airstream, balancing feet, a removable nozzle, and instrumentation and controls to ensure function and safety of equipment and personnel. This device can be on a static or mobile platform, towed or self-propelled and can be locally or remotely controlled.