1. dampers, normally open, 70 degrees is closed, usually installed in the duct through the firewall, fires off the role, you can set the output electrical signal, the temperature exceeds 70 degrees when the valve is closed, the linkage to send (s) off the fans; 2 . smoke fire control valve, normally open, 70 degrees closed, with 1, but more than a telecommunications signal input, control room remote control by eliminating manual damper closed, generally used for peacetime air, fire up a common air duct system, When the fire can be controlled off unneeded air make room; 3. normally open type smoke damper, 280 degrees fuse closed, normally open, output electrical signal, and one that is similar to, but different fusing temperature, generally used in fire row smoke tube through the firewall, the flue gas temperature exceeds 280 degrees when automatic fuse off, you can turn off the exhaust fan interaction. FH-KVD1 fire control valve features: 70 ℃ fuse action, the valve automatically closes. Manually shut down. Output shutdown signal quality manual damper, interlocking related ventilation equipment. Manually open. Manual adjustment of the valve opening angle. FYH-SFVD (ordinary) fire smoke exhaust valve YH-SFD with damper Features: 70 ℃ fuse action, automatically shut down. Consumers control center DC24V power input, the valve automatically closes. Manually shut down. Output off signal, interlock fan stops. Manual reset opening. Manually adjust the air flow. Smoke with fire dampers usually always open, 280 ℃ melt sensor operation is closed. FYH-SFVMD self-locking type smoke fire control valve features: 70 ℃ fuse action 70 ° manual damper, automatically shut down. DC24V electrical signal input valve automatically closes. Manually shut down, manually adjust the closing torque. Output off signal, interlocking air-conditioning fan. Consumers control center DC24V electrical valve can open automatically reset to the original state. Such as the use of shape memory alloy 70 ℃ temperature sensors, when the valve is closed, do not replace the temperature sensor, it can be used repeatedly. Manual adjustment of the valve opening angle. Fire control valve dampers installed in the ventilation, air conditioning system, the return air duct on the road, usually was turned on, when the gas pipeline fire when the temperature reached 70 ℃, fusible film fuse, the valve automatically closes under the force of the torsion spring within a certain period of time to meet the fire resistance stability and fire integrity requirements, from smoke fire retardant valves. When the valve is closed, the output signal of fire control valve closed damper is installed in the ventilation, air conditioning system, the return air duct on the road, usually was turned on manually damper brands, when a fire in the pipeline when the gas temperature reaches 70 ℃, fusible chip fuse, the valve automatically closes in the torsion spring force, in a certain period of time to meet the fire resistance stability and fire integrity requirements, from smoke fire retardant valves. When the valve is closed, the output off signal. Smoke damper: Install exhaust system pipeline, usually generally it was closed when the fire manually or electrically open, played the role of a manual smoke dampers agent prices, GREAT fan (certified), Yangzhou manual dampers. by Fan Air Conditioning Equipment Co., Ltd. Shandong GREAT. Shandong GREAT Fan Air Conditioning Equipment Co. (www.greatfengji.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. GREAT leadership in the staff warmly welcome all inquiries negotiations to create a better future GREAT.