How to choose a nozzle?
|Provisions for nozzle selection under the same conditions of use. In actual engineering, the phenomenon of mistakes caused by improper selection of nozzles is more prominent. Different types and types of nozzles have different conditions of use and installation methods. The selection, installation and orientation of the nozzle will directly affect the action time and water distribution effect of the nozzle. When the installation site does not have a ceiling and the water distribution pipe is arranged under the beam, the hot air flow will spread horizontally after rising to the top plate. At this time, only the upright type nozzle is installed upwards, so that the hot air current can contact and heat the nozzle heat sensitive element as early as possible. When the ceiling is installed indoors, the nozzle will be placed close to the ceiling or buried in the ceiling, so it is suitable to use a drooping or ceiling-type nozzle, otherwise the ceiling will block the distribution of water.|
The water distribution pipe of the side wall type expansion cover nozzle is easy to arrange, and is popular among domestic design, construction and use units. In order to facilitate the system to save water in the road before the fire or maintenance recovery, and to facilitate the exhaust at the start of the system, the dry, pre-action system nozzles are required to use upright nozzles or dry droop nozzles.
The installation height of the closed sprinkler is required to meet the conditions of “opening the sprinkler in time and allowing the sprinkler of the open sprinkler to effectively cover the fire range”. Above the above height, the nozzle will not be opened in time, and the sprinkling after the nozzle is opened may not reach the intended purpose of covering the fire range, and the phenomenon that the fire spreads outside the water spray range, so that the system cannot effectively control the fire extinguishing.