Smoke exhaust fire damper is to use the temperature control of fusible alloy to close the valve by the action of gravity and tension spring organization. When a fire breaks out, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve, or the memory alloy is deformed to automatically close the valve. It is used for occasions where the air duct runs through the fire compartment.
Smoke fire damper as an important fire prevention equipment, but its role has been ignored by many people, so we must pay attention to the investigation in the usual days, for unqualified to respond in a timely manner, to avoid unnecessary loss, smoke fire damper is installed in the smoke exhaust system pipeline, the usual open condition, when the fire in the pipeline when the gas temperature reaches 280 ℃ automatically closed, in a certain time can be satisfied with the fire stability and fire resistance requirements, from the role of smoke fire valve, smoke valve is an indispensable fire equipment fire valve.
The raw materials of smoke control and exhaust fire dampers are generally carbon materials and galvanized plates, which are suitable for installation on the air supply and return air pipes of ventilation and air conditioning systems. They are usually open. When the smoke temperature in the pipe reaches 70 degrees, they are closed, and can meet the requirements of smoke leakage and fire resistance integrity at a certain time, thus achieving the effect of smoke isolation and fire resistance.
The smoke exhaust fan of smoke prevention and fire prevention valve shall ensure continuous operation for 30min at 280 ℃. The smoke exhaust valve (port) of electric operation function shall be quick and reliable when it is 15 or 10 lower than the rated operation voltage. It shall be determined that the connection terminal, the output end of the output module connected with the power line of the valve, and ventilation, air conditioning and smoke prevention and exhaust systems shall be provided for high-rise and other modern buildings. In case of fire, the pipelines in these systems will become flame, the flue gas expansion channel, the exhaust port consists of a smoke exhaust valve and a louver tuyere or a plate type air fire damper, which is used on the special exhaust branch pipe of the rocket system of the smoke exhaust system.
When a fire occurs, the flame invades the air duct, the high temperature melts the fusible alloy on the valve, or the memory alloy deforms to actively close the valve. It is used in occasions where the air duct runs through the fire prevention zone. A smoke exhaust fire damper is set on the smoke exhaust system pipeline to prevent the transmission of high temperature toxic smoke during the fire, causing the fire to spread and increase in toxicity. How should a fire damper be set up today:.
(1) The pipeline crosses the partition wall of the fire compartment.
(2) The pipeline shall pass through the ventilation and air conditioning machine room and the partition wall and floor slab of the room with important or high fire risk.
(3) The horizontal pipe section at the junction of the vertical air duct and the horizontal air duct of each layer.
(4) The pipeline crosses both sides of the deformation joint.
Fire damper and smoke exhaust fire damper are not the same product, and their functions are also different. Fire damper: its function is fire prevention, 700C temperature fuse is actively closed and can be linked, and is used in the air duct of ventilation and air conditioning system. Smoke prevention fire damper: relies on smoke sensing control action, electric closure (smoke prevention), or 700C temperature fuse is actively closed (fire prevention) and used in the air duct of ventilation and air conditioning system.

Common inspection items for smoke exhaust fire dampers.
1. The valve can be closed by DC24V power supply (electric smoke exhaust fire damper).
2. The valve is usually in a normally closed state, and it is opened manually or automatically in a fire. When the airflow temperature reaches 280 ℃, the temperature sensor acts and the valve closes.
3. Manual shutdown or manual reset.
4. Output valve closing signal, which can be interlocked with other fire protection equipment.
5. DC24V electric reset after closing, (fully automatic smoke exhaust fire damper, suitable for places where manual operation is inconvenient).
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures