Under normal circumstances, we learned that when the exhaust fan casing damper assembly plant, should the rotor axis alignment as the base Huai cabinet position and the air inlet of the impeller housing between the inlet port Axial and radial clearance is adjusted to the range of equipment technical documents, as well as to check the anchor bolts are tightened. In addition, we should note in particular is a 800 fan damper the gap value of technical documents such as equipment not specified, the general should impeller diameter axial clearance, the radial clearance should be evenly distributed, its value should the impeller diameter of 1.5 / 1000-3 / 1000 (small diameter by whichever is greater), and finally to understand the particular adjustment sought clearance smaller value to increase the efficiency of fire exhaust fan series. Air flow control valve leaves off and cis-open in ventilation, air conditioning, air purification system as a regulator. Rich _ _ damper damper plant ventilation equipment from Dezhou rich ventilation plant. Dezhou rich ventilation plant (www.frtfsb.com) (www.frtfsb.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead rich ventilation equipment into the brilliant and you work for a better future!