Circular/ Round Fire Damper provided by us, is designed and manufactured by making use of premium grade raw materials and upgraded technology. This damper is a vertical barrier with a spring-loaded construction and continuous fan operation. The fan's air pressure assists in activating the door's spring-loaded system, causing it to close fast and allowing the fan to continue to operate. Circular Fire Damper is tested under various parameters to ensure its high quality and effectiveness. This is safe to use.This Damper is used in Round Duct.