... 21000m3/h, Speed:870~3500r/min, Shipbuilding ventilation fan for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h,Speed ... ±22.5°Continued transversal incline: ±15°Continued longitudinal incline: ±10°Vibration: existentImpact: existent3. CHARACTERISTICSSmall size and light weight.Low noise ... Road,Licang District,Qingdao,Shandong province,China Shipbuilding ventilation fan--Centrifugal fan