Smoke exhaust fire dampers and fire fighting components are generally installed on the pipes of mechanical smoke exhaust systems. They are usually closed. When a fire occurs, the smoke exhaust is opened. When the smoke temperature in the smoke exhaust pipe reaches 280 degrees, it is closed, and within a certain period of time Meet the requirements of smoke leakage and fire resistance integrity, and play the role of smoke isolation and fire resistance. Main materials: carbon steel, galvanized sheet, stainless steel.
1. Low air leakage and good air tightness.
2. The electric opening consumes a small current.
3. Strong anti-corrosion performance and long service life (the material is stainless steel).
4, the actuator drive flexible, feedback, interlock signal accurate.

What are the characteristics of simple fire damper.
The valve according to the size of different single blade and multi-blade form.
The valve body can be equipped with a small inspection port to observe the state of the valve blade. A separate inspection door should be set for replacing the fuse plate. If the user needs to use the inspection door, it can be indicated when ordering. The fire damper pipeline inspection door is installed on the pipeline near the fire damper.
Fully automatic fire damper features.
· 70 ℃ temperature sensor action, the valve closed instantly.
Manual closing, manual opening.
· DC24V electrical signal, electromagnet suction, valve closed.
Output shutdown signal to interlock the fan.
Input DC24V electrical signal, the valve automatically reset to open.
When the flue gas temperature is lower than 70 ℃, the temperature sensor can be reused after automatic reset.
Open multi-leaf control valve.
It is generally used in air conditioning and ventilation system pipes to adjust the air volume of branch pipes. It can also be adjusted by mixing fresh air and return air. The valve is divided into manual and electric. Electric can control and adjust the air volume electrically and match the automatic control system.

Fire damper shall be set on the air duct of the air conditioning system for ventilation under any of the following conditions:
1 Crossing the fire compartment.
2 through the ventilation, air conditioning room fire valve room partition wall and floor.
3 through the important or fire risk room partition wall and floor.
4 crossing both sides of the deformation joint.
5 On the horizontal pipe section at the junction of the vertical air duct and the horizontal air duct of each layer, but when the ventilation and air conditioning systems of each fire compartment in the building are set independently, the junction of the horizontal air duct and the vertical main pipe in the fire compartment may not be equipped with fire dampers.
The smoke exhaust fire damper is installed on the smoke exhaust pipe. Its working principle is that when the fire smoke temperature in the smoke exhaust pipe exceeds 280 degrees, its fusible metal sheet will melt, and the smoke exhaust fire damper will automatically close to prevent the fire from spreading through the smoke exhaust pipe. The structure of the fire damper is mainly composed of a valve body and an actuator. The valve body is composed of a shell, a flange, a blade and a blade linkage mechanism, blade adjustment mechanism, clutch, temperature fuse, etc. The fire damper actuator of the fire damper controls the rotation of the blade through the metal fusible plate and the clutch mechanism.
When the temperature of the gas transported in the pipeline reaches the melting temperature of the fusible metal sheet, the fusible metal sheet melts, and the compression spring and the spring pin on the core shaft quickly lay down the clutch pad. At this time, the clutch and the blade adjusting mechanism are disconnected. As the valve body is equipped with two torsion springs, the blade is rotated by torsion. Thus, the actuator of the fire damper adopts the mechanical transmission principle and does not need electricity, gas and other energy, therefore, it can be ensured that the fire can be prevented under any circumstances. The on-off of the fire damper is in the open state when the system is deactivated and in normal operation according to the requirements of the system. For example, when the temperature of the conveying gas in the pipe is lower than the melting point of the selected metal fusible sheet, the valve is in the normal operation state, and the valve is open. Only when the operation condition exceeds the normal use state, the valve will the valve be automatically closed to achieve its function.
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