DAB.1 NKV, 2 NKV - fire stations EN 12845 with vertical pumps
FIRE STATIONS ACCORDING TO EN 12845 WITH VERTICAL PUMPS
DAB.1 NKV EN 12845, DAB.2 NKV EN 12845
Fire-fighting automatic pressure stations are manufactured in accordance with the regulations of the European standard EN 12845.
The European standard EN 12845 determines the design principles and conditions for the installation and maintenance of fire protection and sprinkler devices in buildings. It replaces the previous standards UNI 9489 and UNI 9490.
An automatic fire sprinkler system is designed to detect the presence of a fire and extinguish it at its initial stage, or to keep the fire under control until it can be extinguished by other means. A classic fire sprinkler system includes: a water source, a fire automatic pressure station, a set of control fittings and a pressure water distribution system with sprinklers.
The main pump started for fire fighting works continuously until it is stopped manually by pressing the STOP button on the control panel. In the case of circuits with hydrants, we refer to the standard UNI 10779 (July 07), which, in accordance with EN 12845, allows automatic shutdown of the main pump under certain circumstances.
Operation of the fire-fighting automatic pressure station. Under normal circumstances (without water intake), the system is maintained under static pressure. Even with a small pressure drop, the auxiliary pump is started, its task is to restore the system pressure and thus eliminate small leaks. However, if the water flow is greater (when the sprinklers are opened), the pressure is further reduced and the main pump is started. The main pump is started by disconnecting the external circuit with one of the two calibrated expansion pressure switches connected in series. A pair of pressure switches start the main pumps at the following pressure values: 4 to 29 m3/h.