Our company is a Texas fire products designated manufacturers, specializing in the production of various damper flue damper, smoke damper, exhaust valves, fire fans and other products, all through the National Fire Testing Center smoke damper, FH-FVD2 damper Features: usually always open, fuse operating temperature 70 ℃. When the temperature of the air inside the duct reaches 70 ℃, fusible film fuse, the valve automatically closes under the force of the torsion spring. When the valve is closed, the output signal is turned off. Manually shut down, manual reset open. PY-SD PY-BSD exhaust valve exhaust valve remote control features: DC24V electrical signal can quickly open the valve. Manually open. Output Enable signal, interlocking exhaust fan. Manual reset closed. PY-BSD exhaust valve can be opened manually remote control, remote control manual reset closed. Texas Rui Xincheng Co., Ltd., is a collection of production and marketing, processing, installation and after-sales service for the integrated enterprise. The company has engaged in 10 years of professional and technical personnel, sophisticated production equipment installed fire dampers, and lay a solid foundation for the quality of fresh air ventilation engineering, the company adhering to the "safety first, quality first, reputation first" management philosophy has always been adhere to the "continuous improvement, rigorous planning, strive for perfection, excellence" quality. Implementation of internal management, external market mode of operation 280 ° smoke damper, first-class product quality, fast service, good corporate reputation for customer safety, engineering and product assured. FH-WFSDC features a damper for the ventilation system, 70 ° C the valve automatically closes. 2, for the exhaust system, 280 ° C the valve automatically closes. 3, manual reset, shut down, there are self-locking device. 4, the opening angle (0-90 ° C) can be adjusted. 5, fusible lever action after a fire alarm signal output. 6, manual shutdown, open hooks, output off signals. Features 1, with automatic locking device, when the high temperature valve spring failure, the valve will not open under the effect of heat pressure. 2, electrical equipment installed in the executive bodies. Explosion damper _ Rui Xincheng air conditioning (certified) _ Wuhai damper provided by Rui Xincheng Air Conditioning Equipment Co., Texas. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Rui Xincheng conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.