
Galvanized Ventilation Air Value Round HVAC System Fd VCD Round Dampers. Dual Functionality: Serves as Volume Control Dampers (VCD) and Fire Dampers (FD) for airflow regulation and fire containment. Corrosion Resistant Materials: Constructed from Galvanized Steel, Stainless Steel 304L/316L, and Aluminum for durability. Customizable Control: Available in Manual or Motorized control options to suit specific project requirements. Wide Size Range: Sizes range from 150mm to 2500mm width, accommodating various duct dimensions. Fire Safety Compliance: FD models automatically close at high temperatures to prevent flame and smoke spread. ISO Certified Quality: Manufacturing processes certified under ISO9001, CE, IAF, CNAS, and CAS standards. Low Leakage Design: Features oil-impregnated sintered bronze bearings and fully welded construction for minimal leakage. Fast Delivery: Standard lead time within 15 workdays for both peak and off-peak seasons.