The existence of smoke exhaust and fire dampers is to eliminate the risk of fire and prevent the occurrence of fire. It is generally installed on the smoke exhaust pipeline of the mechanical smoke exhaust system to prevent smoke and fire. The fire damper produced through one pipe is a type of temperature control valve made of memory melting alloy, which utilizes the action of gravity and spring mechanism to close the valve. In new products, memory alloys are also used to generate deformation and close valves. Its function is that when the temperature of the flue gas reaches 280 ℃, people have basically evacuated and smoke exhaust has no practical significance. At this time, there is already a fire in the flue gas, and the valve automatically closes to avoid the spread of the fire. What precautions should we pay attention to when using smoke exhaust and fire dampers? Below is a brief introduction to the relevant knowledge points.
When the smoke exhaust system is also used as a ventilated air conditioning system, it is not only necessary to consider the air dispatch requirements during ventilation, but also the requirement of being sensitive to smoke exhaust and fire prevention in the event of a fire. In addition, smoke exhaust and fire dampers are also suitable for situations where ventilation and air conditioning pipelines are installed on suspended ceilings and cannot be manually reset. Circular fire dampers and smoke exhaust fire dampers are suitable for ventilation air conditioning systems with smoke and fire prevention requirements. They are very suitable for important buildings with halogenated alkane gas active equipment. Due to the requirement to block all valves before releasing gas, after the rescue is completed, the valve door should be opened for ventilation and exhaust.
Smoke exhaust and fire damper is an important component of the active system, which is installed on site to control the flow path. Therefore, it is an important equipment for blocking the flow path and preventing flammable fluids from entering the fire environment. It is crucial to open or close the smoke exhaust fire damper in case of fire. It is worth noting that due to the fact that the smoke exhaust fire damper is controlled by a dispatcher in the control room and not manually operated, the important feature of the smoke exhaust fire damper should be: it can fully experience temperature regulation and short-term homework, or it should be kept to a small leakage amount when it is difficult to block.
The standard for fire control valves is to adjust the packing box and other sealing components of the control valve, and if necessary, replace the sealing components to adhere to the sealing performance of static and dynamic sealing points. Add smooth oil to the parts that need to be smooth. Conduct pollution discharge and cleaning work on the air source or hydraulic filtration system. Check the connection status and erosion of each connecting point, and replace the connecting parts if necessary.
The general technical parameters of the fire and smoke exhaust valve series products are that the valve frame and blades are made of galvanized steel plate, without welding points, and the surface does not need to be coated. The bearing material of the air valve is sintered bronze oil bearing, which can withstand high temperatures of 300oC and does not require protection. The thickness scale of the valve body is L=200mm, and various special sizes can also be produced according to customer needs.
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