Installed in the central air-conditioning duct systems damper, it works easily fusing temperature control gold using gravity acting and spring mechanism closes the valve. When a fire occurs, the fire invaded the duct, high temperature causes the fusible alloy melting on the valve, or to memory alloy deforms the valve automatically closes, for air duct and the fire district throughout occasions. Scope 1. Automatic smoke fire control valve is suitable for the fire and smoke requirements have ventilation and air conditioning duct system. 2. Special features suitable for Halon gas automatic fire extinguishing equipment important buildings damper prices, because the fire before releasing the gas when asked to close all valves fire offer, after the completion of the fire dampers picture, should be opened for ventilation exhaust valve. 3. For the production exhaust system also serves as ventilation and air conditioning system, that is, to consider the regulation of normal air ventilation requirements, but also consider the case of fire smoke can quickly fire protection requirements. 4. For ventilation and air conditioning installed in the ceiling, can not be manually reset occasions. _ Pictures _ damper damper liter liter Rui Rui Electrical and Mechanical ventilation and air conditioning provided by the Electrical Equipment Factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Swiss mechanical and electrical liter into the brilliant and you work for a better future!