The deluge valve device is a lever type structure with anti-reset function and meets the GB5135.5-2003 standard. The deluge valve unit is widely used in various open systems (open nozzles on the system side piping), such as rain systems, water curtain systems and water mist systems. The opening of the deluge valve device releases the pressure in the diaphragm chamber of the deluge valve, and opens the flap by the pressure on the water supply side. Pressure release in the diaphragm chamber can be performed in a variety of ways, including electrical guidance, wet guidance, and dry guidance.