[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 damper diagram, ventilation, air conditioning, air purification system as a regulator. (3) The test measures the dampers, air flow regulator valve tightness good, the relative amount of air leakage around 5% regulation performance. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - exhaust valve exhaust valve] smoke damper installation ends of each tube mechanical exhaust system (flue gas suction) at the damper in peacetime was closed state and meet the requirements of air leakage, fire or smoke need to open the manual and electric, from the exhaust valve function. Exhaust valves are generally made up of body, blades, actuators and other components. Smoke dampers, Tianjin Jinzhong Ji Alibaba Gold Supplier, provided by the Tianjin Tianjin Jinzhong Ji HVAC dampers 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.