C4-73 dust-exhausting centrifugal ventilators have the features that they are not easy to be dusty and they are durable.This fan is suitable to exhaust gas that includes dust,wood flour,small fiber,etc.if there are hard granulated matters in the dust,the fans should be matched with dust-exhausting set.It is also used to ventilate and exchange air.The fans are mainly made up of impeller,inlet,body,transmission part and motor.It have lett-rotated and right-rotaed types.