... :870~3500r/min, Pressure:490~1800Pa, Shipbuilding Fan blower for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h,Speed ... designed and manufactured into a horizontal structure type or a vertical one, which the vane wheel is mounted directly on the ... .318A,Jiushui Road,Licang District,Qingdao,Shandong province,China Shipbuilding Fan blower--Centrifugal ...