Wet alarm valve device by wet alarm valve, hydraulic alarm, delay, and pressure switch, pressure gauge, drain valve, pilot valve, the alarm test line, etc. Wet alarm valve is only allowed water into the wet system, and under prescribed pressure flow drive a one-way valve fittings alarm. Working principle: wet system full of pressure water in the pipe network, long-term in standby state, apply to 4 ℃ 70 ℃ ambient temperature ( And can only be vertical vertical installation) 。 When a fire protection area, environment temperature, nozzle temperature sensitive element ( The glass ball) Rupture, sprinkler water fire extinguishing, at the same time, water flow indicator indicating the fire area, wet alarm valve open fire water supply, a small fraction of the water to the warning line, drive hydraulic alarm, pressure switch, hydraulic alarm continuous alarm, pressure switch action: start the spray pump, sound and light alarm control center. Dry alarm valve used in dry spray alarm fire extinguishing fire control system, fire water belongs to the system of alarm and control valve, the system is commonly used in the building of environment temperature below 4 ℃, in the bar, the system enters the compressed air through the dry alarm valve will fire pressure water seal in the water side, action occurs when the automatic sprinkler pipe network pressure drop and reaches a certain value when the dry alarm valve open, pressure pipeline fire water through the valve into the system. Working principle: before the start of dry alarm valve (before Connected to the water side) With pressure water filling of the pipeline, after dry alarm valve of the pipe filled with compressed air, alarm valve in the closed state. Fire, automatic sprinkler thermal sensitive element action, nozzle, pipeline in the compressed air from the nozzle, the dry side pressure drop in exports valve, water pressure is greater than the back of the gas pressure in the front of alarm valve, dry alarm valve is automatically opened, the pressure of water into the water supply pipeline, will the rest of the compressed air from the open nozzle, then the sprinkler. In dry alarm valve is opened at the same time, leads to the hydraulic alarm and pressure switch channels are open, water hydraulic alarm and pressure switch, and start the pump pressurized water supply. Wet alarm Industrial Valves is desiccant type alarm valve alarm valve outside is widely applied. Deluge valve which can be applied to wet system, can also be used for the water curtain system, water spray system and fire extinguishing system. Deluge valve and wet alarm Industrial Valves base on one side of the deluge valve system that is the difference between the valve outlet is commonly atc or filling in static water, wet alarm valve system is full of pressure water in the side of the pipe network. Working principle: the diaphragm to separate valve for water supply and pressure cavity, because of the difference of up and down by the water and gravity effect area, closed to achieve good sealing. When the fire breaks out, because of the fire detector signal, open the diaphragm on the deluge valve solenoid valve, or used as thermal signal automatic sprinkler, heated ( Can also be manually open the quick opening valve) Rapid discharge, the water of the pressure cavity pressure, lower part of the disc cavity pressure of water supply quickly pushed up the disc and pipeline fire into the system. Into the alarm line at the same time, make the hydraulic alarm bell alarm, and turn on the pressure switch, for total control room send electrical signals and start the fire pump water supply. Preaction alarm valve is made up of deluge valve and wet alarm valve series, up and down deluge Industrial Valves located at the side of water supply, wet alarm valve side as preaction valve group is located in the system. System consists of preaction valve, hydraulic alarm, pressure switch, air compressor, air maintenance and other components of the device, signal butterfly valves, closed sprinkler installation, and using the commonly used detection system as the alarm and start the device. How it works: in the event of fire, heat smoke fire detector installed in the reserves signal fire etc. Fire alarm controller or fire control center, after receiving the alarm signal sent instructions to open the deluge valve solenoid valve, make the deluge valve opens, the side of the pipe network pressure water flow into the system, into a wet water spray system, hydraulic alarm issued to bitter at the same time, the pressure switch back to the control center shows that line has water filling, and start the fire pump. Closed sprinkler installed on the pipeline has not yet been released, not water. People can be active by the competent personnel to take appropriate action to put the fire out, avoid nozzle water damage caused by the loss. If a fire control continues to develop, cause automatic sprinkler spray glass ball movement, the pump automatic start. After a fire is extinguished, solenoid valve should be closed, the deluge valve closed, and out of the water in the pipe to keep system inflation pressure in 0. 03 - 0. Within the scope of 5 mpa, restore working condition.
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According to the market analysts, exports from Shenzhen Mech Valve Trading Co., Ltd. facilities in China will exceed the forecast.