... :870~3500r/min, Pressure:490~1800Pa, Shipbuilding Fan blower for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h,Speed ... ,Pressure:490~1800Pa,Voltage:380V/440V,50HZ/60HZ1. 4-72 series centrifugal ventilators or simply the ventilator is capable of blowing ... .318A,Jiushui Road,Licang District,Qingdao,Shandong province,China Shipbuilding Fan blower--Centrifugal ...