... , Speed:870~3500r/min, Shipbuilding ventilation fan for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/ ... a vertical one, which the vane wheel is mounted directly on the motor shaft extension.The vane ... °.COMPANY INTRODUCTION Our company,Qingdao Chunhao Air Blower Ventilation Equipment Co., Ltd. is located in the ... ,Qingdao,Shandong province,China Shipbuilding ventilation fan--Centrifugal fan