... ~1800Pa,Voltage:380V/440V,50HZ/60HZ1. 4-72 series centrifugal ventilators or simply the ventilator is capable of blowing air, ocean air containing ... well as other likes spaces.The ventilator is designed and manufactured according to GB11865-89(Marine centrifugal fans) and the Rules and Regulations ... Road,Licang District,Qingdao,Shandong province,China Shipbuilding Fan blower--Centrifugal ventilator