Exhaust port if you have installed the necessary piping exhaust valves, use an ordinary single-Grille to; otherwise required plate discharges, it is also the agency with smoke damper. Our attention to reputation, to ensure product quality dampers, focusing on small profits, rapid delivery Shenzhen damper suppliers, and service system, a lot of new construction in recent years to provide air-conditioning equipment, from product quality and after-sales service , users have been satisfied if the valve and fan interaction should be used with double micro-switch device. Hebei steel blade body should damper manufacturers, the thickness of 2 ~ 6mm, the body of non-combustible material, rotating parts should be corrosion-resistant metallic materials, and flexible rotation. Shall not be less than the thickness of the valve housing 2mm. Yi Rong parts shall comply with recognized standards of the fire department, Liaoning damper, Hefei fire dampers, ventilation equipment from Plumper Plumper Shandong Dezhou ventilation plant. Dezhou Plumper ventilation plant (#) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!