[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - check] opening and closing pieces by medium flow and strength to turn itself on or off, in order to prevent the media called backflow check valve. Check valves are automatic valves, mainly used for one-way flow of media channels, only allowing media to flow in one direction fire exhaust valve to prevent accidents. Check valve according to the structure can be divided into lift check valve, swing check valve and butterfly valve in three ways: 1 is divided into vertical and horizontal lift check valves. 2. Swing check into a single lobe, double valve type and Orange Peel three. 3. butterfly valve for straight-through. Several more formal check valve in the connection can be divided into threaded, flanged, welded connections and wafer four. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - Features] air flow control valve control valve structural features (l) of the air flow control valve in the unity of the whole blade width four sizes, leaf-shaped blades for double diamond, soft overlap between the blades exhaust valves, therefore good airtight performance. (2) air volume control valve body architecture After 2 mm cold rolled galvanized sheet molding damper, carbon dioxide gas welding or welding by ordinary Q235 plate processing; blades with 1 mm cold rolled galvanized sheet for corrugated, two synthetic spot-square shaft valve plug, or 2 mm G235 steel cold forming, punching chip interpolating axes or welding circular shaft. (3) The valve sub-manual, electric, divided according to the materials used: the same iron, galvanized sheet, aluminum plate, stainless steel four, body structure and size specifications. Exhaust valve | Tianjin Jinzhong Ji integrity for 15 years (certified) | Langfang 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.