[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - a pressurized air outlet], product selection pressure outlet points 1. The main control parameters for the selection and specification. 2. The selection of outlet pressure should pay attention to its features such as automatic open and close, open and close the manual, manual reset, signal output, remote control and other requirements. Second, the construction, installation points must be checked before installing the operating mechanism is intact exhaust outlet valve dampers, the action is flexible and effective. Third, the implementation of the standard product standards JG / T14-1999 "ventilation and air conditioning vents" JG / T20-1999 "air distribution performance test methods" engineering standards GB50045-95 "fire protection design of tall buildings" GB50016-2006 "architectural design code for fire protection "GB50243-2002" Ventilation and Air Conditioning Engineering Construction Quality Acceptance "[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 the plate smoke valve valve to prevent the media back check valve called. Check valves are automatic valves, mainly used for medium-way flow of pipeline leafy exhaust port valve, only allows media to flow in one direction, in order 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 exhaust valves valve integrity for 15 years (certified) _ Hebei HVAC dampers provided by the Tianjin Jinzhong Ji 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.