The execution content of the fire damper actuator

To drive the valve action, a matching actuator is required. The actuator used for fire dampers may not be electrically driven, but may also be electrically driven

The actuator that does not require power supply consists of a casing, blade adjustment mechanism, clutch, temperature fuse, etc. The actuator of the fire damper is controlled by a metal fusible plate and a clutch mechanism to rotate the blades

When the temperature of the gas transported in the pipeline reaches the melting temperature of the fusible metal sheet, the fusible sheet melts, and the compression spring and spring pin on its core shaft have a suitable speed to press down the clutch pad. At this time, the clutch and blade adjustment mechanism detach. Due to the two torsion springs installed on the valve body, the blades rotate due to torque. From this, it can be seen that the actuator of the fire damper adopts the principle of mechanical transmission and does not require electricity, gas, or other energy sources, thus protecting it from fire in any situation

According to the requirements of the system, the on/off state of the fire damper is in the open state during system shutdown and normal operation. If the temperature of the gas transported in the pipeline is lower than the melting point of the selected metal fusible plate, it is in the normal operation state and the valve is open. Only when the operating conditions exceed the normal usage state, the valve will automatically close, achieving the function of safety

The electric fire damper actuator requires a power supply to provide driving force, and the electric fire damper needs to be installed on the supply and return air ducts of the ventilation and air conditioning system. It is usually in an open state, and when the smoke temperature in the duct reaches 70 degrees, it is closed and can meet the requirements of smoke leakage and fire resistance integrity within a certain time, playing a role in smoke and fire prevention