S4-72-11 centrifugal fan performance tables full pressure gauge speed flow bolt 2.8A 2900 951-588 1330-2450 M8 × 220 3.2A 2900 1245-784 1975-3640 M8 × 220 3.2A 1450 313-196 991- 1910 M8 × 150 3.6A 2900 1618-1068 2930-5408 M10 × 220 3.6A 1450 402-274 1470-2710 M8 × 220 fan vibration dtf common exhaust fan failure analysis, causes a lot of smoke wind chassis, from the described several aspects to be checked: Storage deformation due to the housing so that the impeller rotation grazing. At this will sound unusual and severe vibration, because the process of stroke and storage cabinet or impeller parts deformed. Fans foot bolts not tightened by the impeller compressive deformation, loose coupling, bearing damage the impeller balancing motor heat damage, it may be caused by one of the following reasons: motor bearing damage to the motor shaft and the fan-shaped tolerance wheel shell is not installed meet the technical requirements of the power supply voltage is too low xgf exhaust fan, exhaust fan, Shantou, Rainbird environment provided by the state-run Wu County Environmental Engineering Limited. Wu County Rainbird Environmental Engineering Co., Ltd. (www.dzrbtf.com) (www.dzrbtf.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 the state-run environment and you work into the brilliant, for a better future!