How to distinguish fire dampers from smoke exhaust fire dampers?

1. Fire dampers with different structures are mainly composed of valve bodies and actuators. The valve body consists of shell, flange, blade and blade linkage mechanism. The actuator consists of a shell, a blade adjusting mechanism, a clutch and a temperature fuse.

As a fire-fighting component, the smoke exhaust fire damper is generally installed on the pipeline of mechanical smoke exhaust system, which is usually in the open state, and closes when the smoke temperature in the smoke exhaust pipeline reaches 280 degrees in case of fire, and meets the requirements of smoke leakage and fire resistance integrity within a certain period of time, thus playing the role of smoke isolation and fire resistance. Main materials: carbon steel, galvanized sheet, stainless steel.

2. The working principle of the fire valve actuator is to control the rotation of the blade through the metal fusible piece and the clutch mechanism. The smoke exhaust fire damper is always open, and it is also open in case of fire. However, when the flue gas temperature reaches 280℃, the smoke exhaust fire damper will automatically close, and the turned-on fan will stop running.

Extended data:

Smoke exhaust valves are installed on the pipes of smoke exhaust systems in high-rise buildings and underground buildings. Its basic functions are: temperature sensing (smoke) electric signal linkage, and start the smoke exhaust fan at the same time; Manually open the valve and start the smoke exhaust fan at the same time; Output valve opening signal.

The smoke exhaust fire damper is installed on the pipeline of the smoke exhaust system that meets the requirements of smoke exhaust and fire prevention (on the pipeline located at the suction inlet of the smoke exhaust fan). Its basic function is not only to have the function of smoke exhaust valve, but also to fuse when the smoke exhaust temperature exceeds 280℃, so that the valve is closed and the smoke exhaust machine stops.

The fire control valve is installed on the pipeline of ventilation and air conditioning system with fire protection requirements (to prevent the fire from spreading along the air duct), and its functions are as follows: the temperature fuse is blown at 70℃ to close the valve; Output the valve closing signal, and the fan of the ventilation and air conditioning system stops; Stepless regulation of air volume.

Baidu encyclopedia-fire damper