... 21000m3/h, Speed:870~3500r/min, Shipbuilding ventilation fan for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h, ... : -25 ~ +50Max relative humidity: 95%Periodical swing: ±22.5°Continued transversal incline: ±15°Continued longitudinal incline: ±10°Vibration: existentImpact ... which is 30°or 22.5°.COMPANY INTRODUCTION Our company,Qingdao Chunhao Air Blower Ventilation Equipment Co., Ltd. is ...