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I. Summary


　　9-19, 9-26-type centrifugal ventilator is commonly used forge furnace and high pressure forced ventilation, it can be widely applied in material delivery, air delivery and non-corrosive, non-ignite gases free of viscous materials, the medium temperature is lower than 50℃, and not exceed 80℃, the dust and hard particle content in the medium is lower than 150mg/m3.
　　This blower is single-suction type and has 13 models include №4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2, 12.5, 14, 16.
　　The ventilator has right rotation and left rotation two types, face from one end of the motor, the clockwise rotation of the impeller is called right rotation fan, represented by 'right'. The anti-clockwise is called left rotation fan, represented by 'left'.
Driving method of fan is A type(№4～6.3) and D type (№7.1～16).
　　The exit position of the fan is represented by the exit angle of the shell 'left' 'right' can produce 0°, 45°, 90°, 135°, 180°, 225° six angles.