[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - air flow control valve] air volume control valve characteristics (l) more Yefeng off valve over size and amount of ventilation ducts standardized national provisions identical rectangular duct size . (2) air flow control valve leaves off and cis-open, ventilation, air conditioning, air purification system as a regulator. (3) The test measured air volume control valve tightness good, the relative amount of air leakage around 5% regulation performance. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - damper] smoke dampers are mainly used on duct ventilation and air conditioning systems, usually in a "normally open" state, when the air temperature reaches 70 ℃ When the valve through the valve motion and automatically turn off the fuse. Exhaust port, exhaust valve is mainly set in the pipe exhaust system, or installed in the inlet of the exhaust fan fire, usually more than one page is turned off valve exhaust port, in case of fire, smoke damper by linkage automatically open the exhaust. Fire damper is installed in the exhaust fan at the entrance and ventilation and air conditioning systems use either system, usually in a "normally open" state, ventilation, air flow in the pipe when the temperature reaches 280 ℃, the valve by fusible metal temperature fuse action automatically closed, cutting off airflow to prevent the spread of fire. There are some buildings in fire protection engineering projects to reuse these devices circumstances. Such as Chongqing Tobacco Building is an example. Automatic tobacco smoke damper Chongqing mainly office and commercial buildings, walkways long mechanical exhaust system is set up, each floor is only a smoke partition. Smoke on each floor electric charge of the design of a normally closed damper, each of each exhaust port has designed an electric normally closed exhaust valves, exhaust fan inlet of the fire has designed a normally closed electric smoke damper. Obviously, this design features a waste of existence, but also modules, valves, construction costs of waste. Recommendation: One way is to exhaust port of the exhaust valve and valve module canceled, changed to single outlet louvers; second method is to normally closed damper on each electric charge of the smoke into the normally open 280 degree closed damper, the control module to the general monitoring module. Both methods achieve the same fire code requirements, and the actual control is also very reliable. Air flow control valve, Tianjin Jinzhong Ji integrity for 15 years (certified), Inner Mongolia valve provided by the Tianjin Jinzhong Ji HVAC purification equipment. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) is a leader in Tianjin, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the group leadership with the staff warmly welcome all inquiries negotiations to create a better future for the base.