Fire damper

Installed on the supply and return air ducts of ventilation and air conditioning systems, the valve remains open during normal operation. In the event of a fire, when the gas temperature inside the pipes reaches 70°C, the fusible link melts, causing the valve to close automatically under the force of the torsion spring. It can meet the requirements for fire resistance stability and integrity for a certain period of time, serving as a smoke and fire barrier. When the valve is closed, it outputs a shutdown signal.

Dust removal and fire prevention damper

Installed on the exhaust ductwork, it is generally in a closed state during normal operation. It can be manually or electrically opened during a fire to perform smoke exhaust. The valve closes when the smoke temperature inside the exhaust pipe reaches 280℃, meeting the requirements for fire resistance stability and integrity within a certain time frame, while serving as a smoke exhaust function.

Product Principle

Installed in the central air conditioning duct system, the principle of operation is temperature control using fusible alloy. It utilizes the force of gravity and the spring mechanism to close the valve. In the event of a fire, the flame invades the duct, causing the fusible alloy on the valve to melt due to high temperature, or the shape-memory alloy to deform, automatically closing the valve. This is used for scenarios where the duct passes through fire-resistant partitions.