... , Speed:870~3500r/min, Pressure:490~1800Pa, Shipbuilding Fan blower for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h,Speed ... °or 22.5°.COMPANY INTRODUCTION Our company,Qingdao Chunhao Air Blower Ventilation Equipment Co., Ltd. is located in the Scientific Technology ... .318A,Jiushui Road,Licang District,Qingdao,Shandong province,China Shipbuilding Fan blower--Centrifugal fan