Fire damper is now gradually widely used in major construction industry fd fire dampers, fire awareness as we continue to improve, so the major building fire safety requirements are also rising, which requires fire dampers have a very Good fire safety features sfdy fire dampers, fire dampers on the main role, we know how much, today, as we detail below: damper that is used to block the smoke and flames from the fire zone by, and certainly within the time meet the fire resistance stability and fire integrity pleading valve. When construction was a fire, the fire along the ventilation, air conditioning system of ballistic rapid extension, the case is a serious loss of many. In order to reduce the fire caused damage to a minimum level, it is necessary to employ useful fire, smoke control measures in order to grasp the fire extension, and fire dampers in ventilation, air conditioning and smoke control system, reasonable equipment, then played a primary Effect. 280 smoke damper fire damper and other nature is the same, only more sensitive to temperature. 280 damper usually was always open, smoke detector control center sent an electrical signal (DC24V) In case of fire, the actuator motor-energizing action within the damper, the valve automatically closes damper 70 ℃, and the output is off electrical signals. After the valve actuation DC motors driving the reset, the valve can be manually shut down or 70 ℃ melting following action closes the valve has a six-speed adjust the air flow opening. Fire damper | Rich ventilation equipment | fire dampers plant by Dezhou rich ventilation plant. Fire damper | Rich ventilation equipment | damper plant in Shandong Dezhou rich ventilation plant (www.frtfsb.com) (www.frtfsb.com) this year introduced a new upgrade, the above picture is for reference only, please call this page or image Contact phone, for the latest information, Contact: Zhang.