A new fan machine is designed based on actual working conditions of different equipment, featuring high flow rate, high pressure, low noise, and stable performance. It can be preheated for full utilization, to save energy, and transport high-temperature gas for circulation. This includes fan machine for high-temperature circulating bar furnace, fan machine for aging furnace, fan machine for annealing furnace, fan machine for homogenizing furnace, fan machine for molding furnace, fan machine for casting furnace, fan machine for spraying line, fan machine for online quenching, fan machine for fluorocarbon line, fan machine for oxidation line, fan machine for discharging table, and so on.