4-72 Centrifugal fan
Technical Parameters:
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Applications:
Metallurgical Industries、Electric power industries
Technical documentation downloads:
Product Details
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Uses:
The main purpose of the 4-72 centrifugal fan is to ventilate or transport air and other non-spontaneous, non-explosive, non-volatile, harmless to the human body, and non-corrosive to steel for indoor ventilation of general factories and large buildings; the B4-72 centrifugal fan can exhaust flammable and volatile gases; the F4-72 centrifugal fan is mainly used to transport corrosive gases. However, the gases transported by the 4-72, B4-72, and F4-72 centrifugal fans must not contain sticky substances, and the dust and hard particles contained must not exceed 150mg/m3, and the gas temperature must not exceed 80℃.
The performance, optional parts and foundation dimensions of the B4-72 fan are consistent with those of the 4-72 fan, and can be selected according to its sample. The structure of this fan is basically the same as that of the 4-72 fan. The No. 2.8A~6A uses the B35 type motor with flange and foot. The No. 6~12C and D motors use the YB series corresponding to the Y series in the table, and the installation type is B3. F4-72 centrifugal fan is made of stainless steel, fiberglass or other corrosion-resistant materials, and its performance and foundation size are the same as those of 4-72 centrifugal fan.
Type:
When viewed from one end of the motor, all impellers that rotate clockwise are called "right-hand fans", indicated by "right", and vice versa are called "left-hand fans", indicated by "left".
The air outlet position of the fan is indicated by the air outlet angle of the casing. 4-72 fans No. 2.8~6 are all made into one type when leaving the factory, and the user unit can install them into the required position according to the requirements. No need to indicate when ordering. Among them: the adjustment range of the air outlet position of No. 2.8 is 0°～225°, and the interval is 45°; the adjustment range of the air outlet of No. 3.2～6 is 0°～225°, and the interval is 22.5°; the adjustment range of the air outlet of No. 8～12 is 0°～225° and the interval is 45°; the air outlet angles of No. 16 and 20 are fixed in three types: 0°, 90°, and 180°, which cannot be adjusted. Please indicate when ordering.
There are four types of transmission modes of the fan: A, B, C, and D: Among the 4-72 type fans, No. 2.8～5 adopts A-type transmission, No. 6 has both A-type transmission and C-type transmission, No. 8～12 adopts C and D-type transmission, and No. 16～20 adopts B-type transmission.
If the above machine number, transmission mode, and outlet angle cannot meet your production needs, our factory has the ability to modify or design for you until you are satisfied.
Structure:
4-72 centrifugal fans No. 2.8A~6A are mainly composed of impeller, casing, air inlet, motor and other parts. No. 6C and No. 8~20 have the above structure and transmission part.
Impeller: It is composed of 10 backward-inclined airfoil blades, curved wheel cover and flat rear disc. It is made of steel plate (B4-72 uses cast aluminum alloy). After dynamic and static balance correction and overspeed operation test, it has high efficiency, stable and reliable operation and good air performance.
Casing: It is made into two different types, among which: No. 2.8~12 casing is made as a whole and cannot be disassembled. No. 16~20 casing is made into a three-open type. In addition to being divided into two halves horizontally, the upper half is divided into two halves vertically along the center line and connected with bolts to facilitate the insertion or removal of the impeller during installation and maintenance.
Air inlet: It is made into an integral structure and installed on one side of the fan. The cross section parallel to the axial direction is a curved shape. Its function is to enable the airflow to enter the impeller smoothly with less loss.
Transmission: It is composed of main shaft, bearing box, rolling bearing, belt pulley or coupling. Performance and selection This sample only gives the dimensionless performance table and dimensionless performance curve of the No. 10 sample, and the dimensionless performance parameters of other machine numbers can be derived from it.
The main purpose of the 4-72 centrifugal fan is to ventilate or transport air and other non-spontaneous, non-explosive, non-volatile, harmless to the human body, and non-corrosive to steel for indoor ventilation of general factories and large buildings; the B4-72 centrifugal fan can exhaust flammable and volatile gases; the F4-72 centrifugal fan is mainly used to transport corrosive gases. However, the gases transported by the 4-72, B4-72, and F4-72 centrifugal fans must not contain sticky substances, and the dust and hard particles contained must not exceed 150mg/m3, and the gas temperature must not exceed 80℃.
The performance, optional parts and foundation dimensions of the B4-72 fan are consistent with those of the 4-72 fan, and can be selected according to its sample. The structure of this fan is basically the same as that of the 4-72 fan. The No. 2.8A~6A uses the B35 type motor with flange and foot. The No. 6~12C and D motors use the YB series corresponding to the Y series in the table, and the installation type is B3. F4-72 centrifugal fan is made of stainless steel, fiberglass or other corrosion-resistant materials, and its performance and foundation size are the same as those of 4-72 centrifugal fan.
Type:
When viewed from one end of the motor, all impellers that rotate clockwise are called "right-hand fans", indicated by "right", and vice versa are called "left-hand fans", indicated by "left".
The air outlet position of the fan is indicated by the air outlet angle of the casing. 4-72 fans No. 2.8~6 are all made into one type when leaving the factory, and the user unit can install them into the required position according to the requirements. No need to indicate when ordering. Among them: the adjustment range of the air outlet position of No. 2.8 is 0°～225°, and the interval is 45°; the adjustment range of the air outlet of No. 3.2～6 is 0°～225°, and the interval is 22.5°; the adjustment range of the air outlet of No. 8～12 is 0°～225° and the interval is 45°; the air outlet angles of No. 16 and 20 are fixed in three types: 0°, 90°, and 180°, which cannot be adjusted. Please indicate when ordering.
There are four types of transmission modes of the fan: A, B, C, and D: Among the 4-72 type fans, No. 2.8～5 adopts A-type transmission, No. 6 has both A-type transmission and C-type transmission, No. 8～12 adopts C and D-type transmission, and No. 16～20 adopts B-type transmission.
If the above machine number, transmission mode, and outlet angle cannot meet your production needs, our factory has the ability to modify or design for you until you are satisfied.
Structure:
4-72 centrifugal fans No. 2.8A~6A are mainly composed of impeller, casing, air inlet, motor and other parts. No. 6C and No. 8~20 have the above structure and transmission part.
Impeller: It is composed of 10 backward-inclined airfoil blades, curved wheel cover and flat rear disc. It is made of steel plate (B4-72 uses cast aluminum alloy). After dynamic and static balance correction and overspeed operation test, it has high efficiency, stable and reliable operation and good air performance.
Casing: It is made into two different types, among which: No. 2.8~12 casing is made as a whole and cannot be disassembled. No. 16~20 casing is made into a three-open type. In addition to being divided into two halves horizontally, the upper half is divided into two halves vertically along the center line and connected with bolts to facilitate the insertion or removal of the impeller during installation and maintenance.
Air inlet: It is made into an integral structure and installed on one side of the fan. The cross section parallel to the axial direction is a curved shape. Its function is to enable the airflow to enter the impeller smoothly with less loss.
Transmission: It is composed of main shaft, bearing box, rolling bearing, belt pulley or coupling. Performance and selection This sample only gives the dimensionless performance table and dimensionless performance curve of the No. 10 sample, and the dimensionless performance parameters of other machine numbers can be derived from it.