As a unique solution using only water for fire fighting, Danfoss SEM-SAFE® High Pressure Water Mist Extinguishing System is an effective fire fighting solution by which water is turned into mist by spraying through the nozzles at high pressure. We protect your personnel and valuable equipment against fire with eco-friendly Danfoss SEM-SAFE® using only water as an extinguishing agent.
A single high-pressure pump unit is sufficient for the operation of the system. This SEM-SAFE unit can protect multiple areas. If the system needs extension later on, it is not necessary to replace the pump unit.
On stand-by, the system maintains a pipe pressure of approximately 12 bars. When the temperature exceeds 57°C, the heat-sensitive glass bulbs mounted in the nozzle heads melt. At this point, the high-pressure pump is automatically activated and water is forced through nozzles at 60 or 100 bar to create a fine mist. Only nozzles with melted bulbs are activated. This means that only the heat-affected area will be actively sprayed.
On stand-by, the system has dry piping. This system will activate manually or when sensors have detected heat, smoke or a flame, depending on type and application. The nozzles are grouped in sections and all the nozzles in the activated section will be released.
In case of fire, the high-pressure pump draws water from the tank on unit, and forces it through a non-return valve to a high-pressure manifold. From here, high pressure water is pressed into the relevant section(s) where fire occurs. Possible increases in pump pressure are continuously controlled by the pressure relief valve.
