Model 4-68 centrifugal  ventilator is applicable for the indoor ventilation and air-exchange in the ordinary factories and large-size architectures.

It can be used for both the input gas and output gas.

It should be air which does not exceed 80℃ and other non-hypergolic gas which is not harmful to human body and not corrosive to the steel and iron materiats.

It allows no adhesve substances also. Its containing dust  and hard particle hard particle should not be larger than 150mg/m3.