9 -19A series high pressure centrifugal ventilator is an energy-saving fan product recommended and popularized by the National Economic Committee and teh Electro-Mechanical Ministry.it is applicable for thr gigh pressure forced entilation in the industries such as the ordinary forging,metallurgy,glass,ceramics,radio,electro-plating,accumulatoretc.and the matter conveyance in the processing trades of grain,forage,breeze,plastics and so on.The conveying media are air,other non-hypergolic gas which are not harmful to the human body and will not corrode steel materials.