G4-73 boiler draft fan is suitable for the draft fan system of the 2-670t/h steam boiler in thermal power plants, among which the G4-73 No20~31.5F centrifugal draft fan is supplementary for 100,000-200,000 KW thermal power units.

In the absence of other special requirements, G4-73 is also suitable for mine ventilation and general ventilation. The medium conveyed by the fan is air, and the minimum temperature does not exceed 80°C. The medium conveyed by the induced draft fan is flue gas, and the maximum temperature shall not exceed 250°C. G4-73 centrifugal draft fans are single suction and air intake, with two support modes: cantilever support (D type) and double support (F type). There are 13 machine numbers of No8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 25, 28, 29.5, etc.

Each type of fan can be made into two types: right-rotating or left-rotating.

Looking at the fan from one end of the motor, the impeller rotating in a clockwise direction is called a right-rotating fan, otherwise is called a left-rotating fan. For the sake of convenient installation and debugging, the overall support and vibration reduction support of steel structure are also supplied.