9-12 SERIES · HIGH RESISTANCE PROCESS AIR
9-12 High Pressure Centrifugal Fan
The 9-12 series is positioned for high-resistance air systems that need more airflow than the smaller 8-09 duty range, including long duct runs, furnace air supply, process equipment and reviewed conveying-air service.
The supplied catalogue covers A- and D-arrangement groups, with normal listed operating points of approximately 1,700–9,038 m³/h and 11,590–21,931 Pa. Model choice should follow the operating point and drive arrangement, not model number alone.
Technical Index
Normal Catalogue Airflow
1,700–9,038 m³/h
Normal Catalogue Pressure
11.59–21.93 kPa
Documented Groups
6.8A · 7.1A · 7.4D · 7.7A · 8D · 9D
01 · Series Architecture
9-12 Is a Family of A- and D-Arrangement High-Pressure Fans
The catalogue does not describe 9-12 as one single mechanical layout. The documented performance groups include both A- and D-arrangement models, so replacement and procurement work should confirm the exact fan number and arrangement before using dimensions or motor information.
A Arrangement Groups
6.8A · 7.1A · 7.7A
Use the A-arrangement catalogue performance points when the project or replacement record identifies an A-type fan.
D Arrangement Groups
7.4D · 8D · 9D
D-series installation dimensions and foundation data must be matched to the selected D-type model and motor configuration.
02 · Selection Boundary
9-12 vs 8-09: Where the Catalogue Ranges Separate
Catalogue Item
8-09
9-12
Airflow
675–6,049 m³/h
1,700–9,038 m³/h
Pressure
10,523–20,736 Pa
11,590–21,931 Pa normal listed points
Selection emphasis
Smaller airflow / furnace-blowing range in the supplied catalogue
Wider airflow coverage for high-resistance process-air systems
This comparison is a catalogue-range distinction, not a substitute for fan selection. If the duty point falls near the overlap, send the actual airflow and total pressure so the fan family and arrangement can be reviewed together.
Catalogue Performance Data
Catalogue Operating Envelope by Drive Arrangement
The operating points below are transcribed from the supplied 9-12 catalogue pages. Parenthetical edge points are retained as notes rather than included in the normal quick-range figures because the catalogue states bracketed values are generally not selected.
9-12 · Catalogue Group
No.6.8A
Speed: 2930 r/min
Catalogue motor options: 15 / 18.5 / 22 kW
Catalogue motor options: 15 / 18.5 / 22 kW
Point
Total Pressure Pa
Airflow m³/h
Required Power kW
1
11,590
1,700
9.32
2
11,820
2,160
11.59
3
12,000
2,620
13.57
4
12,140
3,080
15.93
5
12,120
3,540
18.27
6
11,980
4,000
20.55
7
11,740
4,460
22.60
9-12 · Catalogue Group
No.7.1A
Speed: 2900 r/min
Catalogue motor options: 15 / 18.5 / 22 / 30 kW
Catalogue motor options: 15 / 18.5 / 22 / 30 kW
Point
Total Pressure Pa
Airflow m³/h
Required Power kW
1
12,347
2,074
12.10
2
12,661
2,658
15.02
3
12,807
3,000
16.43
4
12,896
3,242
18.02
5
13,024
3,826
21.14
6
12,935
4,410
24.30
7
12,739
4,990
27.65
9-12 · Catalogue Group
No.7.4D
Speed: 2900 r/min
Catalogue motor options: 15 / 18.5 / 22 / 30 / 37 / 45 kW
Catalogue motor options: 15 / 18.5 / 22 / 30 / 37 / 45 kW
Point
Total Pressure Pa
Airflow m³/h
Required Power kW
1
13,416
2,349
14.88
2
13,749
3,010
18.47
3
14,004
3,371
22.16
4
14,142
4,332
25.99
5
14,053
4,993
29.89
6
13,838
5,654
33.99
7
13,465
6,315
38.07
9-12 · Catalogue Group
No.7.7A
Speed: 2930 r/min
Catalogue motor options: 22 / 30 / 37 / 45 kW
Catalogue motor options: 22 / 30 / 37 / 45 kW
Point
Total Pressure Pa
Airflow m³/h
Required Power kW
1
14,513
2,349
15.81
2
14,887
3,010
19.60
3
15,171
3,671
23.52
4
15,319
4,332
27.59
5
15,220
4,993
31.72
6
14,985
5,654
36.07
7
14,583
6,315
40.40
9-12 · Catalogue Group
No.8D
Speed: 2950 r/min
Catalogue motor options: 30 / 37 / 45 / 55 kW
Catalogue motor options: 30 / 37 / 45 / 55 kW
Point
Total Pressure Pa
Airflow m³/h
Required Power kW
1
16,216
2,996
22.97
2
16,528
3,824
28.24
3
16,931
4,651
33.98
4
17,096
5,478
39.78
5
16,931
6,306
45.52
6
16,729
7,133
51.83
Catalogue point 7 is printed in parentheses: 16,216 Pa / 7,960 m³/h / 57.84 kW. The catalogue note states bracketed values are generally not selected.
9-12 · Catalogue Group
No.9D
Speed: 2970 r/min
Catalogue motor options: 45 / 55 / 75 / 90 kW
Catalogue motor options: 45 / 55 / 75 / 90 kW
Point
Total Pressure Pa
Airflow m³/h
Required Power kW
1
20,803
4,295
42.24
2
21,202
5,481
51.93
3
21,719
6,667
62.48
4
21,931
7,853
73.15
5
21,719
9,038
83.12
Catalogue points 6–7 are printed in parentheses: 21,461 Pa / 10,225 m³/h / 95.31 kW and 20,808 Pa / 11,411 m³/h / 106.40 kW. The catalogue note states bracketed values are generally not selected.
D-Series Dimensions
D-Series Installation and Foundation Data
The current catalogue source includes installation and outline data for No.6.8D, 7.1D and 7.4D. Final GA drawings should be checked after the exact drive arrangement, motor and discharge orientation are confirmed.
No.6.8D
No.6.8D Installation Data
Dimension Group
Catalogue Value
Inlet D1 / D2 / D3
240 / 274 / 303 mm
Inlet holes n1-d1
8-Φ10
Outlet A0–A7
80 / 192 / 225 / 250 / 60 / 86 / 119 / 144 mm
Outlet holes n2-d2
10-Φ7
E / F / G / K / L / M / N
134 / 439 / 938.5 / 427.5 / 1154.5 / 1101 / 635 mm
Foundation a / b / c / d / e / f
525 / 685 / 167 / 785 / 660 / 47 mm
Support anchor bolts
M20×500
Motor anchor bolts
See performance table
Weight excl. motor
484 kg
Rolling bearing
3515
No.7.1D
No.7.1D Installation Data
Dimension Group
Catalogue Value
Inlet D1 / D2 / D3
250 / 280 / 310 mm
Inlet holes n1-d1
8-Φ10
Outlet A0–A7
80 / 200 / 233 / 258 / 60 / 90 / 123 / 148 mm
Outlet holes n2-d2
10-Φ (diameter not legible in source print)
E / F / G / K / L / M / N
139.5 / 457.5 / 978.5 / 446.5 / 1161 / 1121 / 635 mm
Foundation a / b / c / d / e / f
525 / 685 / 169 / 785 / 660 / 49 mm
Support anchor bolts
M20×500
Motor anchor bolts
See performance table
Weight excl. motor
495 kg
Rolling bearing
3515
No.7.4D
No.7.4D Installation Data
Dimension Group
Catalogue Value
Inlet D1 / D2 / D3
260 / 294 / 323 mm
Inlet holes n1-d1
8-Φ10
Outlet A0–A7
80 / 208 / 241 / 266 / 60 / 94 / 127 / 152 mm
Outlet holes n2-d2
10-Φ7
E / F / G / K / L / M / N
145 / 476 / 1018.5 / 466 / 1167.5 / 1141 / 635 mm
Foundation a / b / c / d / e / f
525 / 685 / 171 / 785 / 660 / 51 mm
Support anchor bolts
M20×500
Motor anchor bolts
See performance table
Weight excl. motor
505 kg
Rolling bearing
3515
Source note: the No.7.1D outlet-hole entry is printed as “10-Φ” without a legible diameter value in the supplied catalogue image, so no diameter has been guessed.
05 · Application Fit
Use 9-12 Where System Resistance Drives the Selection
Long Duct Runs
For systems where duct length, fittings and equipment create substantial resistance.
Furnace Air Supply
For furnace or process-air duties that require both high pressure and more airflow.
Process Equipment
Air delivery through resistance-heavy equipment or process lines.
Reviewed Conveying Air
For clean or reviewed pneumatic-conveying air duties when the real system resistance is known.
06 · Procurement Data
What to Send for a 9-12 Selection or Replacement
01 · Airflow
m³/h or CFM at the duty point
m³/h or CFM at the duty point
02 · Total Pressure
Pa / kPa at the same point
Pa / kPa at the same point
03 · Arrangement
A or D if replacing an existing fan
A or D if replacing an existing fan
04 · Medium
Temperature, dust and gas condition
Temperature, dust and gas condition
05 · Electrical
Voltage, frequency and motor requirement
Voltage, frequency and motor requirement
06 · Installation
Rotation, outlet angle, base and available space
Rotation, outlet angle, base and available space
08 · RFQ
Send the 9-12 Operating Point and Arrangement
For new selection, send airflow, total pressure and working conditions. For replacement, also send the existing model, A/D arrangement, motor data, rotation, outlet direction and available installation dimensions.