DN40 ~ DN200 electrical detection systems or manual / electric emergency manual DV-5 electric / pneumatic double interlock pre-action system valve opening means is operated Shandong fm certification valve, solenoid valve is opened. Only when one or more closed nozzle operation, the system exhaust pipe, pneumatic valve is opened. Because the solenoid valve and pneumatic valve installed in series in the pre-action valve diaphragm chamber discharge line, fm certification valve, only in the detection system operation and closed nozzle action two conditions are met, Changsha fm certified valves, solenoid valves and pneumatic valves Under open the case, the pre-action valve to open. Detection system malfunction or nozzle, the pipe network damage is not simultaneous, pre-action valve can not be opened. DV-5 with a single interlock preaction pressure monitoring system (power-up or a wet or dry start to start) DN40 ~ DN200 valve factory preset to a pressure of 25 ± 2psi (1.72 ± 0.14bar) fully open, the pressure reached 18psi (1.24 bar) when partially open. Sprinkler system pressure drops or pipe rupture caused damage does not result in DV-5 type deluge valve opens, the pressure inside the pipe is used only for seal monitoring system. After the detection system operation, pre-action valve can be opened to the pipe filled with water. DV-5 Diaphragm type deluge valve and deluge system DN40 ~ DN200 1.72 Mpa external reset, fm certification valves, vertical or horizontal mounting DV-5 Deluge Valves are diaphragm type structure, valve size DN40-DN200, can vertical or horizontal mounting. Automatic control valve used to supply water systems and other fire protection systems - in the deluge system, pre-action system, foam. Matching the appropriate valve piping components in the system operation, the deluge valve to provide a fire alarm signal. Guangzhou fm Certification valves | Year Anyuan Electromechanical | fm certified valve by the Hubei Chong Anyuan Electrical Equipment Co., Ltd. to provide. Hubei Chong Anyuan Electrical Equipment Co., Ltd. (www.hbcay119.com) (www.hbcay119.com) is a leader in Wuhan, fire protection equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Anyuan electromechanical leadership in creating the staff warmly welcome all inquiries negotiations to create create a better future for electromechanical Anyuan.