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Diaphragm  type deluge alarm valve

                  ZSFM model deluge alarm valve adopt the principle of diaphragm and non-return, when the pipeline pressure which around diaphragm reach to balance, diaphragm will be in a closed position, when water supply system pressure exceed pipeline pressure, diaphragm will auto open a one-way check valve, and it can composed with other accessaries and become kinds of deluge alarm fire extinguisher systems.

Working Principle

               When the diaphragm is closed, the valve body is divided into upper and lower part. The upper part is connected with pipe network of automatic sprinkler system and the lower part is connected with pipe network of water supply system. The sealed cover and diaphragm form a cavity with pressure control. There is pipe connecting water supply pipe of upper valve body. When the cavity pressure and water supply line pressure keep balance, the diaphragm is in a sealing state(for the preparation condition). At this point, the water supply system is unable to supply water to the pipe network. When the cavity pressure drops, the diaphragm will automatically opens and supply water.

Places for Installation

                      This type deluge alarm valve is  Usually installed in hospital, inns, malls, gyms,  airports, factories, libraries, exhibition centers and other places with automatic sprinkler fire system.  

Installation

     1. Before installation, wash the pipeline and test the  pressure.

   2. When lifting the valve, exert force on the two flange neck. Not allowed to exert force on the pipeline accessories, to prevent deformation and damage.

    3. This valve should be installed vertically on the line with arrow up. It you want to horizontally install, please state when ordering. Remember to spare adequate space for the convenience of operation and maintenance.

   4. All the drain ports of the valve are connected to the drain line with a suitable galvanized pipe or hose.

   5. The solenoid valve should be connected to the electrical cabinet by the control module. Voltage for DC24V.

   6. Pay attention to the installation of water powered alarm. Small caliber for water inlet, need to be installed horizontal. Big caliber for water outlet, need to be installed vertically.

   7. Both sides of the valve have been installed with fire signal valve for the convenience of control and maintenance.

Main technical parameter

        1. rated working pressure: 1.2 ~ 1.6MPa

      2. sealing test pressure: 2.4 ~ 3.2MPa

      3. water supply pressure range: 0.14 ~ 1.6MPa

      4. pipeline air pressure range: 0.3 ~ 0.5MPa(dry type systems)

      5. alarm capability: DN100 and DN150 within 15S, DN200 within 60S

      6. the pressure of alarm area: >=0.05MPa