Exhaust port if you have installed the necessary piping exhaust valve manual damper on ordinary single-Grille to; otherwise required Baotou damper plate discharges, it also has smoke damper body. Measured by test round dampers, air flow regulator valve tightness good, the relative amount of air leakage around 5% regulation performance. Damper 70 ℃, Xinzhou fire dampers, ventilation equipment from Plumper Plumper Shandong Dezhou ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) (www.frtfsb.com) 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!