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4-72； B4-72 (explosion-proof); F4-72 (anti-corrosion) centrifugal fan
The 4-72 centrifugal fan can be used for indoor ventilation and air exchange in general factories and large buildings. Transporting air and other gase
Product details
purpose
4-72typeCentrifugal ventilation fanIt can be used for indoor ventilation and air exchange in general factories and large buildings. Transporting air and other gases that are non flammable, non explosive, non-volatile, harmless to human health, and non corrosive to steel.
B4-72The explosion-proof centrifugal fan can discharge flammable and volatile gases. The motor needs to be equipped with an explosion-proof motor, and the impeller is made of aluminum or non-metallic materials
F4-72Type anti-corrosion centrifugal fan is used to transport corrosive gases, and its material is fiberglass or steel plate stainless steel
But 4-72, B4-72, F4-72 typesCentrifugal ventilation fanThe gas being transported must not contain any viscous substances, dust, or hard particles with a concentration of no more than 150mg/m3. The gas temperature must not exceed 80 ℃.
The performance, selected components, and foundation dimensions of B4-72 fan are consistent with those of 4-72 fan, and can be selected according to its sample. The structure of the fan is basically the same as that of the 4-72 type. The No2.8-6A adopts the B35 type motor with flange and foot, while the No.6-12C and D motors use the YB series corresponding to the Y series in this table, and the installation form is B3.
The F4-72 fan is made of stainless steel and fiberglass material for transporting corrosive gases, and its performance and foundation size are the same as the 4-72 type.
type
When viewed from one side of the motor, if the impeller rotates clockwise, it is called a right cyclone machine, represented by "right"; if the impeller rotates counterclockwise, it is called a left cyclone machine, represented by "left".
The outlet position of the fan is represented by the angle of the air outlet of the casing. 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. There is no need to specify when ordering
The adjustment range for the position of air outlet No. 2.8 is 0 °~225 °; The interval is 45 degrees. The adjustment range of the air outlet position from 3.2 to 6 is 0 ° to 225 °, with an interval of 22.5 °. The adjustment range for the position of air outlets No. 8-12 is 0 °~225 °, with an interval of 45 °. There are three fixed positions for air outlets numbered 16 and 20: 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, A type transmission is used for No. 2.8-5, A and C type transmission is used for No. 6, C and D type transmission is used for No. 8-12, and B type transmission is used for No. 16 and 20.
Structural characteristics
4-72Type 2.8A~6A fans are mainly composed of impellers, casings, inlet air and other parts matched with direct connected motors. In addition to the above-mentioned parts, № 6C and № 8-20 also have a transmission part
Impeller - consisting of 10 aft sloping wing shaped blades, a curved front plate, and a flat rear plate. Made of copper plate or cast aluminum alloy, and calibrated for dynamic and static balance, it has good air performance, high efficiency, and smooth operation.
Chassis - made in two different types. The shell of No. 2.8-12 is made as a whole and cannot be disassembled, while the shell of No. 16-20 is made as a three open type. 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 inlet - made as a whole, installed on the side of the fan, with a curved cross-section parallel to the axial direction, which can allow gas to enter the impeller smoothly with minimal loss.
Transmission - composed of main shaft, bearing housing, rolling bearings, pulleys or couplings.
4-72typeCentrifugal ventilation fanIt can be used for indoor ventilation and air exchange in general factories and large buildings. Transporting air and other gases that are non flammable, non explosive, non-volatile, harmless to human health, and non corrosive to steel.
B4-72The explosion-proof centrifugal fan can discharge flammable and volatile gases. The motor needs to be equipped with an explosion-proof motor, and the impeller is made of aluminum or non-metallic materials
F4-72Type anti-corrosion centrifugal fan is used to transport corrosive gases, and its material is fiberglass or steel plate stainless steel
But 4-72, B4-72, F4-72 typesCentrifugal ventilation fanThe gas being transported must not contain any viscous substances, dust, or hard particles with a concentration of no more than 150mg/m3. The gas temperature must not exceed 80 ℃.
The performance, selected components, and foundation dimensions of B4-72 fan are consistent with those of 4-72 fan, and can be selected according to its sample. The structure of the fan is basically the same as that of the 4-72 type. The No2.8-6A adopts the B35 type motor with flange and foot, while the No.6-12C and D motors use the YB series corresponding to the Y series in this table, and the installation form is B3.
The F4-72 fan is made of stainless steel and fiberglass material for transporting corrosive gases, and its performance and foundation size are the same as the 4-72 type.
type
When viewed from one side of the motor, if the impeller rotates clockwise, it is called a right cyclone machine, represented by "right"; if the impeller rotates counterclockwise, it is called a left cyclone machine, represented by "left".
The outlet position of the fan is represented by the angle of the air outlet of the casing. 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. There is no need to specify when ordering
The adjustment range for the position of air outlet No. 2.8 is 0 °~225 °; The interval is 45 degrees. The adjustment range of the air outlet position from 3.2 to 6 is 0 ° to 225 °, with an interval of 22.5 °. The adjustment range for the position of air outlets No. 8-12 is 0 °~225 °, with an interval of 45 °. There are three fixed positions for air outlets numbered 16 and 20: 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, A type transmission is used for No. 2.8-5, A and C type transmission is used for No. 6, C and D type transmission is used for No. 8-12, and B type transmission is used for No. 16 and 20.
Structural characteristics
4-72Type 2.8A~6A fans are mainly composed of impellers, casings, inlet air and other parts matched with direct connected motors. In addition to the above-mentioned parts, № 6C and № 8-20 also have a transmission part
Impeller - consisting of 10 aft sloping wing shaped blades, a curved front plate, and a flat rear plate. Made of copper plate or cast aluminum alloy, and calibrated for dynamic and static balance, it has good air performance, high efficiency, and smooth operation.
Chassis - made in two different types. The shell of No. 2.8-12 is made as a whole and cannot be disassembled, while the shell of No. 16-20 is made as a three open type. 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 inlet - made as a whole, installed on the side of the fan, with a curved cross-section parallel to the axial direction, which can allow gas to enter the impeller smoothly with minimal loss.
Transmission - composed of main shaft, bearing housing, rolling bearings, pulleys or couplings.
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