A proportioner having a body portion that defines a foam passage and a fluid passage. The proportioner also includes a restrictor assembly having a restrictor disk and an orifice plate having an opening for receiving the restrictor disk. The proportioner can further include a rod member connected to the restrictor disk and a clapper assembly connected to the rod member via a sliding interface. The clapper assembly can be configured to control a flow of the foam concentrate through the foam passage in proportion to a flow of the fire protection fluid through the fluid passage by moving the rod member to vary the distance between the restrictor disk and the orifice plate. The sliding interface can be disposed between a first guide and a second guide, and at least a portion of the restrictor disk is disposed in the opening.

A system for dispensing flame retardant foam on the exterior of a structure. The structure has an opening that enables distribution of flame retardant foam onto the roof. The system includes a foam distribution system having a foam expansion chamber and a roof plenum for delivery through the roof opening. Foam solution and compressed air are combined in a conduit and supplied to the foam expansion chamber. The structure may have at least one wall. In that case, the system may have a wall plenum for delivery of flame retardant foam from the foam expansion chamber through a first wall-associated opening. Each such wall will have an opening associated with the wall that enables distribution of flame retardant foam onto that wall.

A fire detection and suppression system operates in independent autonomous modes or under human command. Optical, thermal and laser based sensors detect fire conditions. Anemometers and thermometers detect environmental conditions, allowing the system to adjust the flow of fluid from the system to the targeted flame or condition. Algorithmic analysis of the input data in connection with such preselected thresholds permits rapid detection of fire conditions and in automatic modes triggers a suppression response. A feedback loop enhances adjusts for dynamic flame and environmental conditions.

Systems and methods for fire suppression systems are disclosed. In one embodiment, the fire suppression system comprises a water supply system, a foam concentrate supply system, and a foam concentrate recovery system. The water supply system includes a water pump and a water supply line. The foam concentrate supply system includes a foam pump and a foam concentrate supply line, the foam concentrate supply line fluidly connected with the water supply system to facilitate mixing foam concentrate provided by the foam concentrate supply system with water provided by the water supply system. The foam concentrate recovery system includes a recovery pump fluidly connectable with the foam concentrate supply system to facilitate the extraction of foam concentrate from at least a portion of the foam concentrate supply system. The system and method can also include circulating foam concentrate to promote mixing and hinder the congealment of foam concentrate.

Systems and methods for fire suppression systems are disclosed. In one embodiment, the fire suppression system comprises a water supply system, a foam concentrate supply system, and a foam concentrate recovery system. The water supply system includes a water pump and a water supply line. The foam concentrate supply system includes a foam pump and a foam concentrate supply line, the foam concentrate supply line fluidly connected with the water supply system to facilitate mixing foam concentrate provided by the foam concentrate supply system with water provided by the water supply system. The foam concentrate recovery system includes a recovery pump fluidly connectable with the foam concentrate supply system to facilitate the extraction of foam concentrate from at least a portion of the foam concentrate supply system. The system and method can also include circulating foam concentrate to promote mixing and hinder the congealment of foam concentrate.

A dispensing unit that consists of two or more dispensing solutions, at least one being a fluorine-free foam solution, and at least one hydrogel-based solution, and which involves the dispensing of each solution through one or more compressed air foam system (CAFS), where the CAFS may use compressed air, nitrogen, or other inert gas. The individual solutions may be mixed prior to the CAFS, or one or more solutions mixed after the CAFS, or they may be mixed in separate CAFS chambers. The resulting foam may be dispensed through a single line or through multiple lines, applied simultaneously and/or at different times, and may be controlled manually and/or through automatic controls, or through a combination of the above.

A dispensing unit that consists of two or more dispensing solutions, at least one being a fluorine-free foam solution, and at least one hydrogel-based solution, and which involves the dispensing of each solution through one or more compressed air foam system (CAFS), where the CAFS may use compressed air, nitrogen, or other inert gas. The individual solutions may be mixed prior to the CAFS, or one or more solutions mixed after the CAFS, or they may be mixed in separate CAFS chambers. The resulting foam may be dispensed through a single line or through multiple lines, applied simultaneously and/or at different times, and may be controlled manually and/or through automatic controls, or through a combination of the above.

A fire suppression system includes a motor and a foam pump. The foam pump is driven by the motor to inject one or more chemical additives from an off-board additive container into a discharge conduit. A bypass valve is in fluid communication with the output of the foam pump. One or more sensors are configured to measure at least one operating condition of the foam pump. A controller is in communication with the one or more sensors and is operatively connected to the bypass valve. The controller is configured to determine, based on data received from the one or more sensors regarding the at least one operating condition of the foam pump, whether the foam pump is experiencing a loss of prime, and to open the bypass valve in response. The motor may also selectively operate in one of two modes depending on the rotational speed and torque required.

A fire suppression system includes a motor and a foam pump. The foam pump is driven by the motor to inject one or more chemical additives from an off-board additive container into a discharge conduit. A bypass valve is in fluid communication with the output of the foam pump. One or more sensors are configured to measure at least one operating condition of the foam pump. A controller is in communication with the one or more sensors and is operatively connected to the bypass valve. The controller is configured to determine, based on data received from the one or more sensors regarding the at least one operating condition of the foam pump, whether the foam pump is experiencing a loss of prime, and to open the bypass valve in response. The motor may also selectively operate in one of two modes depending on the rotational speed and torque required.

An exemplary fire suppression system includes a sprinkler nozzle. At least one conduit is connected to the nozzle for delivering a fire suppression fluid to the nozzle. The conduit and the nozzle establish a discharge path. A pneumatically driven pump is connected with the conduit for pumping fluid into the conduit. A gas source provides pressurized gas to the pump for driving the pump. The gas source also provides gas to the discharge path for achieving a desired discharge of the fluid from the nozzle. A controller selectively controls at least one of (i) the gas provided to the pump, which controls the fluid pressure in the conduit, or (ii) the gas provided to the nozzle or the conduit, which controls the gas pressure delivered to the nozzle.