The fire valve is mainly composed of a valve body and execution agency. The valve body consists of a shell, flange, blades, and blades linkage mechanisms. The execution mechanism consists of a shell, blade regulation mechanism, clutch, and temperature fuse.The fire valve is controlled by metal molten slices and clutch mechanisms to control the rotation of the blades. The common fire valves on the market are 70 ° C and 280 ° C fire prevention valve.
Firewood valve working principle
The fire valve is usually open. When the fire occurs, when the gas temperature in the pipeline reaches 70 ° C or 280 ° C, it reaches the fuse temperature of the easy melting metal piece.Take off with the blade regulating mechanism. There are two twisting springs on the valve body, which causes the leaves to be rotated by a torque.The fire valve has strong corrosion resistance and refractory stability, and generally works with fan linkage.
Firewood valve classification
Firewood valves can be divided into structures such as smoke discharge valve, smoke and fire valve, fire prevention regulating valve, smoke -proof fire prevention valve.
1. The smoke exhaust valve is installed on the pipeline of high -rise buildings and underground building smoke exhaust systems. Its basic functions include: temperature -sensitive (smoke) electrical signal linkage, smoke exhaust fan at the same time; manual valve opens, smoke exhaust fan at the same time starts at the same time, starts at the same time,; Output valve opens the signal.
2. Tobacco -fire -proceed fire prevention valve is installed on the smoke exhaust system pipeline (located on the smoke exhaust fan into the mouth pipe). Its basic function is in addition to the function of smoking valve.The fuse exceeds 280 ° C, which makes the valve turn off and the discharge machine is stopped at the same time.
3. The fire -resistant regulating valve is installed on the ventilation and air -conditioning system pipelines with fire prevention requirements (preventing the fire from spreading along the wind). Its function is: the temperature fuse is melted at 70 ° C to turn the valve closed;System fan shutdown; stepless adjustment of air volume.
4. The smoke -proof fire prevention valve is installed on the ventilation and air -conditioning system pipeline (preventing the spread of the fireworks) with the requirements of smoke -proof and fire prevention requirements. Its functions are: to smoke (temperature) telecommunications signal linkage to turn off the valve, ventilation and air -conditioning system fan shutdown; manual manual; manual manual; manual manual; manual manual; manual manual; manual manual; manual manual; manual manual; manual manual; manual manual; manual manual; manuallyThe valve is turned off, the fan is stopped; the temperature fuse is closed at 70 ° C. The valve is closed; the output valve closed the signal;
Features of fire valve
The fire valve has low air leakage and good gas tightness. The execution agency is flexible and can be feedback, and the signal is available. It uses the advantages of manual, electric and automatic adjustment devices. It can work in time when fire occurs.Fire fire exhaust system.
The above is the working principle and classification characteristics of the fire prevention valve. If you want to understand and learn more about related knowledge, please pay more attention to us ——