... h, Speed:870~3500r/min, Pressure:490~1800Pa, Shipbuilding Fan blower for shipyard use Draft fan:Weight:25~352kg,Volume:500 ... simply the ventilator is capable of blowing air, ocean air containing salt vapour, and corrosive air which contains oil vapour and a small ... 30°or 22.5°.COMPANY INTRODUCTION Our company,Qingdao Chunhao Air Blower Ventilation Equipment Co., Ltd. is located in the Scientific ...