Duct Control Valve Smokeproof Motorized Fire Damper

Duct Control Valve Smokeproof Motorized Fire Damper. Overload Protection Motor: Motor includes overload protection eliminating need for limit switches. Automatic Stop Function: Stops automatically when adjustable 90-degree opening stop is reached. Reversible Operation: Smoke dampers function as reversible on/off units for HVAC systems. Galvanized Steel Construction: Made from durable galvanized steel with Z275g/G90 zinc coating. Multiple Insulation Options: Available in both non-insulated and insulated versions with fiber glass or rock wool. Wide Diameter Range: Available in diameters from 80mm to 500mm for various duct sizes. Dual Voltage Support: Motor compatible with 24V and 230V power supplies. ISO Certified Quality: Product meets ISO certification standards for safety and performance.