Large Airflow · Double Inlet · Industrial Ventilation
4-2×72 Double Inlet Centrifugal Fan
The 4-2×72 double inlet centrifugal fan is designed for large-volume industrial ventilation and centralized air handling systems. Air enters from both sides of the impeller, helping support stable airflow for factory ventilation, workshop exhaust, equipment air supply and process cooling.
Fan Structure
Double Inlet
The 4-2×72 centrifugal fan uses a double-inlet layout, allowing air to enter from both sides of the impeller. It is suitable for industrial ventilation systems that require high airflow and stable operation.
The standard fan can convey air and other non-flammable, non-toxic and non-corrosive gases. The medium must not contain sticky substances. Dust and hard particle content should not exceed 150 mg/m³, and the gas temperature should not exceed 80°C.
Core Selection Logic
A double-inlet fan should be selected by the real operating point, not only by model number. Airflow and pressure must be checked together with duct resistance, medium condition, temperature and motor configuration.
Key Product Features
Double-Inlet Airflow
Air enters from both sides of the impeller, supporting high-volume air handling in centralized ventilation systems.
Type E Drive Arrangement
The fan uses Type E transmission, with the impeller supported through the shaft and bearing assembly.
Left or Right Rotation
The fan can be supplied in left-hand or right-hand rotation according to the installation layout.
Multiple Outlet Angles
Available outlet positions include 0°, 90° and 180° to match project ductwork.
Material Options
Carbon steel and stainless steel configurations can be provided according to the conveyed medium and project requirements.
Project Selection Support
Qiyue Fan matches fan size, airflow, pressure, speed and motor power to the required duty point.
Confirmed Technical Data
Fan Type
Double inlet centrifugal fan
Fan Sizes
6E, 8E, 10E, 12E, 14E, 16E, 18E and 20E
Rotation
Left-hand or right-hand
Outlet Angles
0°, 90° and 180°
Maximum Gas Temperature
80°C
Dust and Hard Particle Content
Not more than 150 mg/m³
Conveyed Medium
Air or other non-flammable, non-toxic and non-corrosive gas without sticky substances
Main Components
Impeller, casing, inlet, bearing housing and motor
Use, Configuration and Structure
Application
Conveyed Medium
The fan can convey air and other non-flammable gases that are harmless to people and non-corrosive to steel. The medium must not contain sticky substances. Dust and hard particles should not exceed 150 mg/m³, and the gas temperature should not exceed 80°C.
Configuration
Rotation and Outlet
The fan can be manufactured in right-hand or left-hand rotation. Standard outlet positions are 0°, 90° and 180°, measured by the casing outlet angle.
Construction
Main Components
The 4-2×72 fan consists mainly of the impeller assembly, casing assembly, inlet, bearing housing and motor. It uses double-inlet air intake and Type E transmission.
4-2×72 Centrifugal Fan Performance Table
The following performance data covers fan sizes 6, 8, 10, 12 and 14. Final selection should be checked against the required airflow, total pressure, rotational speed and motor power.
Fan Size
Speed
(r/min)
Motor
(kW)
Airflow
(m³/h)
Total Pressure
(Pa)
6
2000
22
21200–35200
2136–1499
6
1836
15
19500–32200
1793–1264
6
1620
11
17200–28300
1411–1009
6
1450
7.5
15360–25400
1117–784
6
1280
5.5
12100–18000
891–793
6
1130
4
20970–20000
676–480
6
1000
3
9460–12900
529–480
6
920
2.2
14600–16000
450–313
8
1630
45
36500–63100
2567–1911
8
1440
30
32100–55500
1989–1509
8
1280
22
28600–49400
1577–1195
8
1190
18.5
26590–54900
1362–1029
8
1020
11
22400–38600
960–725
8
900
7.5
20100–34800
774–627
8
800
5.5
17920–31000
617–460
8
715
4
15840–27420
480–372
10
1300
75
72400–110700
2538–1852
10
1160
55
64600–98700
2009–1470
10
1040
37
57900–88500
1617–1185
10
960
30
53000–81700
1381–1009
10
830
22
46200–62500
1029–882
10
740
15
66600–63000
823–597
10
660
11
36700–56000
656–480
10
580
7.5
32000–49400
509–372
12
1160
132
111000–161000
2911–2303
12
1040
90
92700–143900
2342–1852
12
940
75
89300–128000
1901–1509
12
810
45
65600–112000
1421–1127
12
710
30
68400–99000
1088–8624
12
630
22
60800–87800
8624–6860
12
560
15
54000–78000
6860–5390
12
500
11
48200–69600
5320–4310
14
830
110
123400–177800
1980–1460
14
740
75
112200–185600
1577–1156
14
660
55
98200–141400
1245–921
14
580
37
86200–124200
970–715
14
520
30
77200–111400
764–568
14
470
18.5
69800–100600
627–470
14
420
15
62400–89800
499–372
14
370
11
55000–79200
392–294
Data verification note: Several values in the supplied source table appear unusual, including Size 6 at 1130 r/min and 920 r/min, Size 10 at 740 r/min, and several pressure ranges for Size 12. These values have been retained exactly as supplied and should be checked against the original factory performance sheet before final publication.
Technical note: Airflow, pressure, rotational speed, motor power and overall dimensions vary by fan size and must be confirmed against the required operating point.
Typical Applications
Factory Ventilation
Workshop Air Exhaust
Equipment Air Supply
Industrial Air Circulation
Centralized Ventilation
Process Cooling Air
Information Required for Fan Selection
01
Required airflow in m³/h or CFM.
02
Required pressure or duct resistance.
03
Working medium and dust condition.
04
Normal and maximum temperature.
05
Rotation, outlet angle and installation layout.
06
Voltage, frequency, phase and quantity.
Frequently Asked Questions
What fan sizes are available for the 4-2×72 series?
Available sizes include 6E, 8E, 10E, 12E, 14E, 16E, 18E and 20E.
Can the 4-2×72 fan be supplied in stainless steel?
Yes. Stainless steel can be selected according to the conveyed medium and corrosion-resistance requirement.
Which outlet angles are available?
The standard available outlet positions are 0°, 90° and 180°.
What is the maximum operating temperature?
The standard gas temperature should not exceed 80°C.
Need a 4-2×72 Fan Recommendation?
Send your airflow, pressure, duct layout, working medium, temperature and electrical requirements. Qiyue Fan will review the operating condition and recommend a suitable configuration.
Send: Airflow | Pressure | Medium | Temperature | Rotation | Outlet Angle | Voltage | Quantity
Manager Zhao
Industrial Ventilation Fan Supplier
SHANDONG QIYUE FAN CO., LTD.
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