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 mandrel quickly lay down the clutch backing plate. At this time, the clutch and the blade adjusting mechanism are disengaged, and the blade rotates due to the torsion of two torsion springs installed on the valve body. It can be seen that the actuating mechanism of 3c fire damper adopts the principle of mechanical transmission, which does not need electricity, gas and other energy sources, thus ensuring that it can play a fire prevention role under any circumstances.

According to the requirements of the system, the 3c fire damper is in the open state when the system is out of service and in normal operation. For example, when the temperature of the gas transported in the pipe is lower than the melting point of the selected metal fusible piece, it is in the normal operation state and the valve is open. Only when the operating conditions exceed the normal use state, the valve will automatically close to achieve the role of security.

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 mandrel quickly lay down the clutch backing plate. At this time, the clutch and the blade adjusting mechanism are disengaged, and the blade rotates due to the torsion of two torsion springs installed on the valve body. It can be seen that the actuating mechanism of 3c fire damper adopts the principle of mechanical transmission, which does not need electricity, gas and other energy sources, thus ensuring that it can play a fire prevention role under any circumstances.

According to the requirements of the system, the 3c fire damper is in the open state when the system is out of service and in normal operation. For example, when the temperature of the gas transported in the pipe is lower than the melting point of the selected metal fusible piece, it is in the normal operation state and the valve is open. Only when the operating conditions exceed the normal use state, the valve will automatically close to achieve the role of security.