70 degrees dampers used in air conditioning, ventilation system pipes; usually normally open and close the event of a fire, interlocking fan, the fan turned off; 280 degrees dampers used in the exhaust system pipe, usually always open, fire When the smoke, when the flue gas temperature reaches 280 degrees, the damper closed damper Wuhan quality wholesale fan interlock closure; 280 damper should be normally open, also known as high-temperature fire dampers, typically installed in a high-temperature environment of ventilation ducts , after the temperature reaches 280 fusible alloy melting damper, smoke damper valve closes Wuhan, while you can use 24V control signals. If that is the 280 smoke damper should be normally closed, install the control center when the fire broke out in the exhaust pipe so that it opens the smoke signals are given when the temperature reaches 280 fusible alloy melts valve is closed, is a two actuations of the valve. 1 Overview As the name suggests, is used to block the flue damper and flame from the fire zone by Wuhan smoke damper price and within a certain period of time to meet the fire resistance stability and fire integrity requirements of the valve. When the building is on fire, the fire spread rapidly along the pipeline ventilation and air conditioning systems, resulting in a significant loss of the case are many. In order to reduce the losses caused by the fire to a minimum, we must take effective fire, smoke control measures to control the spread of fire, and a reasonable set of dampers in ventilation, air conditioning and smoke control system, then played an important effect. However, in many design projects, dampers selection error, set the position unreasonable common occurrences. Smoke damper Wuhan, Wuhan Han Wei Li Yuen (certified), fire dampers provided by Wuhan Han Wei Liyuan heating equipment Limited. Wuhan Han Wei Li Yuen-being of Equipment Co., Ltd. (www.whhwly.com) is a leader in Wuhan, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In Wuhan Han Wei Li Yuen leadership with the staff warmly welcome all inquiries negotiations to create Wuhan Han Wei Li Yuen a better future.