applicationThe 4-72 centrifugal fan can be used for indoor ventilation and air exchange in general factories and large buildings, conveying air and other non self igniting, harmless to human health, and non corrosive gases to steel. The B4-72 fan can be used for ventilation and exchange of flammable and volatile gases.

application environmentThere must be no viscous substances in the gas, and the content of dust and hard particles should not exceed 150mg/m3. The gas temperature shall not exceed 80 ℃

Rotation angleWhen viewed from the side of the electric motor and the impeller rotates clockwise, it is called a right cyclone machine, represented by "right"; The counterclockwise rotation of the impeller is called a left cyclone, represented by "left". The outlet position of the fan is represented by the angle of the air outlet of the casing. The 4-72 type fans No.2.8-6 are all made in one form when they leave the factory, and the user unit installs them in the required position according to the requirements. They do not need to be specified when ordering. The adjustment range for the position of the No2.8 air outlet is 0-225 °, with an interval of 45 °. The adjustment range for the position of the air outlet of No3.2-6 is 0 ° to 225 °, with an interval of 22.5 °. The adjustment range of No.8-12 air outlet positions is 0-225 °, with an interval of 45 °. No.16、 There are three fixed positions for the 20 air outlets: 0 °, 90 °, and 180 °, which cannot be adjusted and must be specified when ordering. There are four transmission modes for fans: A, B, C, and D. In the 4-72 type fan, No.2.8-6 adopts A-type transmission, while No.8-12 adopts C-type and D-type transmission.

Overall structureThe No2.8-6 in the 4-72 type fan are mainly composed of impellers, casings, air inlets, and other parts matched with direct connected motors. In addition to the above-mentioned parts, No.8-20 also has transmission parts.

impellerComposed of 10 aft leaning wing shaped blades, a curved front plate, and a flat rear plate. Made of steel plate or cast aluminum alloy, and calibrated for dynamic and static balance, it has good air performance, high efficiency, and smooth operation.

ShellMake it into two different forms. The No.2.8-12 casings are made as a whole and cannot be disassembled, while the No.16-20 casings are made in a three part form. In addition to being divided into two halves along the horizontal plane, the upper half is vertically divided into two halves along the centerline and connected by bolts.

Air inletMade as a whole, installed on the side of the fan, with a curved cross-section parallel to the axial direction, which allows gas to enter the impeller smoothly with minimal loss.

transmission groupComposed of a spindle, bearing housing, rolling bearings, pulleys, or couplings.