G4-73 boiler blower. G4-73 and Y4-73 boiler pass, induced draft fan is suitable for power plant 2 ~ 670T / h steam boiler pass, induced draft fan systems. In no other special requirements, G4-73 can be used for mine ventilation and general ventilation. Fan transmission medium is air, the maximum temperature should not exceed 80 ℃; medium induced draft fan for transporting gas, the temperature should not exceed 250 ℃. Fan and induced draft fan made of single inhalation, each with a total of 12 №8 ~ 28 gauge. Before the induced draft fan, dust removal device must be installed to minimize the fan into the flue gas dust content. According to the general power plants do not blame circumstances, dust removal efficiency of not less than 85%. Fan drive way D-type, all with flexible coupling drive. The main fan impeller, housing, air inlet, adjust the doors and transmission parts. Impeller: 12 backward by the beveled blade airfoil welded to the middle of the arc cone-shaped front plate and the plate after plate. Through the same draft fan impeller same number. Chassis: chassis is welded steel with ordinary snail shape. Single suction fan casing made of three different forms: №8 ~ 12 chassis made the overall structure, can not be disassembled. №14 ~ 16 made two open chassis. №18 ~ 28 chassis made three open. Of the induced draft fan, snail-shaped plate made thicker to prevent wear proper. Inlet: Convergence, streamlined inlet into the overall structure, bolted to the fan inlet side. Adjust the door: means for adjusting the flow rate of the fan, axial inlet installed in the front. Adjustment range from the 0 ° (fully open) to 90 ° (fully closed)