... Speed:870~3500r/min, Pressure:490~1800Pa, Shipbuilding Fan blower for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h,Speed ... one, which the vane wheel is mounted directly on the motor shaft extension.The vane wheel, being riveting structure is made ... 30°or 22.5°.COMPANY INTRODUCTION Our company,Qingdao Chunhao Air Blower Ventilation Equipment Co., Ltd. is located in the Scientific ...