W4-73 high temperature fans for conveying non-corrosive, not spontaneous combustion, the maximum temperature does not exceed 500 ℃ high-temperature gas, if a large amount of gas dust should be equipped with front air inlet fan collection efficiency of not less than 85% dust removal device, in order to improve fan life. Where the inlet conditions equivalent performance to adapt those can be selected. Impeller material is heat-resistant stainless steel, static and dynamic balance and speed test. Transmission Group is composed of the main shaft, heat sink, cooling the bearing housing, bearings.