4-79 (4-2×79) Centrifugal Fan

4-79 (4-2×79) Centrifugal Fan

I. Applications of Fans
The 4-79 type centrifugal fan is suitable for indoor ventilation and air exchange in general factories and large buildings. It can be used both for intake and exhaust of gases. The types of gases transported include air and other non-flammable, non-explosive, non-tangling gases that are harmless to humans and non-corrosive to steel materials. There should be no sticky substances in the gas, and the dust and hard particles contained should not exceed 150mg/m3. The temperature of the gas should not exceed 80°C; gases with similar properties can also be chosen.
II. Type of Fan
Each fan housing is made in both clockwise and counterclockwise rotation types.
2. The outlet position of the fan is indicated by the outlet angle of the housing. The 4-79 model fans No3A to 6A are all manufactured in one type at the factory. The installation unit can then install them at the required position. The adjustment range of the outlet position is 0 degrees to 225 degrees, with an interval of 45 degrees; for No7C to 8C, the adjustment range of the outlet position is 0 degrees to 180 degrees, with an interval of 22.5 degrees; for No10E to 20E, both single and double inlet outlet positions are manufactured in three fixed angles: 0 degrees, 90 degrees, and 180 degrees, which cannot be adjusted. If you require special machine numbers, special outlet angles, or non-standard models, our company can design and manufacture them for you, but please specify in detail when placing the order.
Section 3: Fan Structure
The fan is mainly composed of the impeller, housing, inlet, and motor. The No7C to 20E models also include a transmission section in addition to the aforementioned parts.
1. Impeller: Composed of rear-tilted arc-shaped thin-plate blades, a curved front disk, and a flat rear disk. All made of steel plates and balanced statically and dynamically, it boasts excellent air performance, high efficiency, and smooth operation.
Shell: Available in two different styles. Models No.3 to No.12 are made as a single piece, non-detachable. Models No.14 to No.20 are made in a two-section design, divided horizontally along the middle, connected by bolts.
3. Inlet: Formed as a whole, mounted on the side of the fan, with a cross-section that is curved and parallel to the axis, allowing gas to smoothly enter the impeller with minimal loss.
4. Transmission Group: Composed of the main shaft, bearing housing, rolling bearings, belt pulley, or coupling.