... :870~3500r/min, Pressure:490~1800Pa, Shipbuilding Fan blower for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h,Speed ... series centrifugal ventilators or simply the ventilator is capable of blowing air, ocean air containing salt vapour, and corrosive air which ... .318A,Jiushui Road,Licang District,Qingdao,Shandong province,China Shipbuilding Fan blower--Centrifugal ...