Axial Industrial Fans & Blowers 390
| Part | RoHS | Manufacturer | Thermal Device Type | Body Material | Construction | Airflow | Noise | Approvals (V) | Minimum Operating Temperature | Life Expectancy | Height | Width | Diameter | Speed | Bearing Type | Additional Features | Packing Method | Pressure | Weight | Voltage (Rated) | Length | Power (Rated) | Current (Rated) | Maximum Operating Temperature |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Nmb Technologies |
DC Fan |
Plastic |
Axial |
54.7 cfm (92.936 m³/h) |
41 dB |
UL |
-10 °C (14 °F) |
70,000 h |
3.622 in (92 mm) |
0.984 in (25 mm) |
3200 rpm |
Ball |
4.826 mmH₂O (47.327 pa) |
95 g |
24 V |
3.622 in (92 mm) |
3.84 W |
160 mA |
70 °C (158 °F) |
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|
Nmb Technologies |
DC Fan |
Plastic |
Axial |
77 cfm (130.824 m³/h) |
45 dB |
UL |
-10 °C (14 °F) |
100,000 h |
3.622 in (92 mm) |
0.984 in (25 mm) |
4500 rpm |
Ball |
9.906 mmH₂O (97.145 pa) |
135 g |
24 V |
3.622 in (92 mm) |
5.28 W |
220 mA |
70 °C (158 °F) |
|||||
|
Nmb Technologies |
DC Fan |
Plastic |
Axial |
25 cfm (42.475 m³/h) |
36 dB |
UL |
-10 °C (14 °F) |
2.362 in (60 mm) |
0.984 in (25 mm) |
5300 rpm |
Ball |
7.366 mmH₂O (72.236 pa) |
65 g |
24 V |
2.362 in (60 mm) |
3.12 W |
130 mA |
70 °C (158 °F) |
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|
Sanyo Denki America |
DC Fan |
Plastic |
Axial |
88 cfm (149.513 m³/h) |
40 dB |
CSA; TUV |
-20 °C (-4 °F) |
40,000 h |
4.921 in (125 mm) |
0.984 in (25 mm) |
2850 rpm |
Approvals: UL |
6.528 mmH₂O (64.018 pa) |
240 g |
12 V |
4.724 in (120 mm) |
3.72 W |
310 mA |
70 °C (158 °F) |
||||
|
|
Sunon |
DC Fan |
Axial |
3.8 cfm (6.456 m³/h) |
26 dB |
CCC; CSA |
0.984 in (25 mm) |
0.394 in (10 mm) |
14000 rpm |
Vapo |
Approvals: CUL; TUL; UL; VDE |
6.858 mmH₂O (67.254 pa) |
6.8 g |
12 V |
0.984 in (25 mm) |
600 mW |
50 mA |
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|
Delta Electronics |
DC Fan |
Plastic |
Axial |
14.83 cfm (25.196 m³/h) |
44.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
1.575 in (40 mm) |
0.591 in (15 mm) |
11000 rpm |
Ball |
Approvals: VDE |
15.26 mmH₂O (149.649 pa) |
25 g |
12 V |
1.575 in (40 mm) |
4.2 W |
350 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
27.54 cfm (46.791 m³/h) |
44 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
1 in (25.4 mm) |
5000 rpm |
Ball |
Approvals: VDE |
7.47 mmH₂O (73.256 pa) |
80 g |
24 V |
2.362 in (60 mm) |
3.36 W |
140 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
37.54 cfm (63.781 m³/h) |
38.5 dB |
CE; CSA; UL |
2.756 in (70 mm) |
0.591 in (15 mm) |
4300 rpm |
Ball |
Approvals: VDE |
5.33 mmH₂O (52.269 pa) |
47 g |
24 V |
2.756 in (70 mm) |
3.6 W |
150 mA |
|||||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
45.45 cfm (77.22 m³/h) |
44 dB |
CE; CSA; UL |
2.756 in (70 mm) |
0.591 in (15 mm) |
5200 rpm |
Ball |
Approvals: VDE |
7.79 mmH₂O (76.394 pa) |
47 g |
12 V |
2.756 in (70 mm) |
4.44 W |
370 mA |
|||||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
110.18 cfm (187.197 m³/h) |
59 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
1.496 in (38 mm) |
3.622 in (92 mm) |
4800 rpm |
Ball |
Approvals: VDE |
16.9 mmH₂O (165.732 pa) |
198 g |
24 V |
3.622 in (92 mm) |
18 W |
750 mA |
60 °C (140 °F) |
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|
Delta Electronics |
DC Fan |
Plastic |
Axial |
113.11 cfm (192.175 m³/h) |
49.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
4.724 in (120 mm) |
1 in (25.4 mm) |
3400 rpm |
Ball |
Approvals: VDE |
10.92 mmH₂O (107.089 pa) |
198 g |
12 V |
4.724 in (120 mm) |
9.6 W |
800 mA |
60 °C (140 °F) |
||||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
110.18 cfm (187.197 m³/h) |
59 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
1.496 in (38 mm) |
3.622 in (92 mm) |
4800 rpm |
Ball |
Approvals: VDE |
16.9 mmH₂O (165.732 pa) |
198 g |
24 V |
3.622 in (92 mm) |
14.4 W |
600 mA |
60 °C (140 °F) |
|||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
103.75 cfm (176.272 m³/h) |
47.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
4.724 in (120 mm) |
1 in (25.4 mm) |
3100 rpm |
Ball |
Approvals: VDE |
9.43 mmH₂O (92.477 pa) |
198 g |
12 V |
4.724 in (120 mm) |
7.2 W |
600 mA |
60 °C (140 °F) |
|||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
50.4 cfm (85.63 m³/h) |
59 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
1 in (25.4 mm) |
9000 rpm |
Ball |
Approvals: VDE |
23.52 mmH₂O (230.652 pa) |
80 g |
12 V |
2.362 in (60 mm) |
13.2 W |
1.1 A |
70 °C (158 °F) |
|||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
14.83 cfm (25.196 m³/h) |
46.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
1.575 in (40 mm) |
0.591 in (15 mm) |
11000 rpm |
Ball |
Approvals: VDE |
15.26 mmH₂O (149.649 pa) |
25 g |
12 V |
1.575 in (40 mm) |
4.2 W |
350 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
190.481 cfm (323.629 m³/h) |
59.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
4.724 in (120 mm) |
1.496 in (38 mm) |
4100 rpm |
Ball |
Approvals: VDE |
17.635 mmH₂O (172.94 pa) |
330 g |
24 V |
4.724 in (120 mm) |
18 W |
750 mA |
70 °C (158 °F) |
||||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
55.63 cfm (94.516 m³/h) |
61.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
50,000 h |
1.496 in (38 mm) |
2.362 in (60 mm) |
10000 rpm |
Ball |
Approvals: VDE |
36.88 mmH₂O (361.669 pa) |
138 g |
12 V |
2.362 in (60 mm) |
15.36 W |
1.28 A |
60 °C (140 °F) |
|||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
190.481 cfm (323.629 m³/h) |
59.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
4.724 in (120 mm) |
1.496 in (38 mm) |
4100 rpm |
Ball |
Approvals: VDE |
17.635 mmH₂O (172.94 pa) |
330 g |
24 V |
4.724 in (120 mm) |
18 W |
750 mA |
70 °C (158 °F) |
||||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
148.34 cfm (252.031 m³/h) |
55 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
4.724 in (120 mm) |
1 in (25.4 mm) |
4000 rpm |
Ball |
Approvals: VDE |
15.29 mmH₂O (149.944 pa) |
320 g |
24 V |
4.724 in (120 mm) |
13.68 W |
570 mA |
70 °C (158 °F) |
|||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
210.38 cfm (357.438 m³/h) |
68 dB |
CE; CSA; UL |
-10 °C (14 °F) |
50,000 h |
1.496 in (38 mm) |
4.724 in (120 mm) |
6000 rpm |
Ball |
Approvals: VDE |
29.179 mmH₂O (286.148 pa) |
330 g |
48 V |
4.724 in (120 mm) |
36 W |
750 mA |
60 °C (140 °F) |
|||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
151.85 cfm (257.995 m³/h) |
56 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
4.724 in (120 mm) |
1.496 in (38 mm) |
3700 rpm |
Ball |
Approvals: VDE |
14.5 mmH₂O (142.196 pa) |
256 g |
24 V |
4.724 in (120 mm) |
18 W |
750 mA |
60 °C (140 °F) |
|||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
27.72 cfm (47.097 m³/h) |
42 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
0.512 in (13 mm) |
5400 rpm |
Ball |
Approvals: VDE |
6.41 mmH₂O (62.861 pa) |
33.5 g |
12 V |
2.362 in (60 mm) |
4.32 W |
360 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
44.01 cfm (74.773 m³/h) |
48 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.756 in (70 mm) |
1 in (25.4 mm) |
4700 rpm |
Ball |
Approvals: VDE |
7.89 mmH₂O (77.374 pa) |
90 g |
24 V |
2.756 in (70 mm) |
5.28 W |
220 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
36.3 cfm (61.674 m³/h) |
41.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.756 in (70 mm) |
1 in (25.4 mm) |
3900 rpm |
Ball |
Approvals: VDE |
5.52 mmH₂O (54.133 pa) |
90 g |
24 V |
2.756 in (70 mm) |
3.84 W |
160 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
66.11 cfm (112.322 m³/h) |
40.5 dB |
CE; UL; VDE |
3.622 in (92 mm) |
0.787 in (20 mm) |
3300 rpm |
Ball |
5.03 mmH₂O (49.327 pa) |
92 g |
12 V |
3.622 in (92 mm) |
3.36 W |
280 mA |
||||||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
252.85 cfm (429.595 m³/h) |
70.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
1.496 in (38 mm) |
4.724 in (120 mm) |
5500 rpm |
Ball |
Approvals: VDE |
35.877 mmH₂O (351.833 pa) |
380 g |
24 V |
4.724 in (120 mm) |
57.6 W |
2.4 A |
60 °C (140 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
175.03 cfm (297.378 m³/h) |
71.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
50,000 h |
1.496 in (38 mm) |
3.622 in (92 mm) |
8000 rpm |
Ball |
Approvals: VDE |
46.21 mmH₂O (453.165 pa) |
250 g |
24 V |
3.622 in (92 mm) |
52.32 W |
2.18 A |
60 °C (140 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
17.3 cfm (29.393 m³/h) |
38 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
0.591 in (15 mm) |
4500 rpm |
Ball |
Approvals: VDE |
4.97 mmH₂O (48.739 pa) |
44 g |
24 V |
2.362 in (60 mm) |
3.6 W |
150 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
44.01 cfm (74.773 m³/h) |
44 dB |
CE; CSA; UL |
2.756 in (70 mm) |
1 in (25.4 mm) |
4700 rpm |
Ball |
Approvals: VDE |
7.89 mmH₂O (77.374 pa) |
90 g |
24 V |
2.756 in (70 mm) |
4.32 W |
180 mA |
|||||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
44.01 cfm (74.773 m³/h) |
44 dB |
CE; CSA; UL |
2.756 in (70 mm) |
1 in (25.4 mm) |
4700 rpm |
Ball |
Approvals: VDE |
7.89 mmH₂O (77.374 pa) |
90 g |
24 V |
2.756 in (70 mm) |
4.32 W |
180 mA |
|||||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
30.48 cfm (51.786 m³/h) |
46.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
1 in (25.4 mm) |
5500 rpm |
Ball |
Approvals: VDE |
8.76 mmH₂O (85.906 pa) |
80 g |
12 V |
2.362 in (60 mm) |
3.36 W |
280 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
27.54 cfm (46.791 m³/h) |
44 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
1 in (25.4 mm) |
5000 rpm |
Ball |
Approvals: VDE |
7.47 mmH₂O (73.256 pa) |
80 g |
24 V |
2.362 in (60 mm) |
3.36 W |
140 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
27.72 cfm (47.097 m³/h) |
42 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
0.512 in (13 mm) |
5400 rpm |
Ball |
Approvals: VDE |
6.41 mmH₂O (62.861 pa) |
33.5 g |
12 V |
2.362 in (60 mm) |
4.32 W |
360 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
20.3 cfm (34.49 m³/h) |
44 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
1.969 in (50 mm) |
0.787 in (20 mm) |
7000 rpm |
Ball |
Approvals: VDE |
7.7 mmH₂O (75.511 pa) |
38 g |
12 V |
1.969 in (50 mm) |
2.88 W |
240 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
3.53 cfm (5.998 m³/h) |
32 dB |
CE; CSA; UL |
-10 °C (14 °F) |
30,000 h |
1.181 in (30 mm) |
0.394 in (10 mm) |
9000 rpm |
Ball |
Approvals: VDE |
2.5 mmH₂O (24.517 pa) |
10.5 g |
12 V |
1.181 in (30 mm) |
1.8 W |
150 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
27.72 cfm (47.097 m³/h) |
42 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
0.512 in (13 mm) |
5400 rpm |
Ball |
Approvals: VDE |
6.41 mmH₂O (62.861 pa) |
33.5 g |
12 V |
2.362 in (60 mm) |
4.32 W |
360 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
51.31 cfm (87.176 m³/h) |
45.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
3.622 in (92 mm) |
0.591 in (15 mm) |
3300 rpm |
Ball |
Approvals: VDE |
3.96 mmH₂O (38.834 pa) |
68 g |
12 V |
3.622 in (92 mm) |
5.4 W |
450 mA |
60 °C (140 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
50.4 cfm (85.63 m³/h) |
59 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
1 in (25.4 mm) |
9000 rpm |
Ball |
Approvals: VDE |
23.52 mmH₂O (230.652 pa) |
80 g |
12 V |
2.362 in (60 mm) |
13.2 W |
1.1 A |
70 °C (158 °F) |
||||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
81.47 cfm (138.418 m³/h) |
50 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
3.622 in (92 mm) |
1 in (25.4 mm) |
3800 rpm |
Ball |
Approvals: VDE |
8.76 mmH₂O (85.906 pa) |
120 g |
24 V |
3.622 in (92 mm) |
7.2 W |
300 mA |
70 °C (158 °F) |
|||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
51.31 cfm (87.176 m³/h) |
45.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
3.622 in (92 mm) |
0.591 in (15 mm) |
3300 rpm |
Ball |
Approvals: VDE |
3.96 mmH₂O (38.834 pa) |
68 g |
12 V |
3.622 in (92 mm) |
5.4 W |
450 mA |
60 °C (140 °F) |
||||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
243.66 cfm (413.981 m³/h) |
70 dB |
CE; CSA; UL |
-40 °C (-40 °F) |
70,000 h |
1.496 in (38 mm) |
4.724 in (120 mm) |
5300 rpm |
Ball |
Approvals: VDE |
33.315 mmH₂O (326.709 pa) |
380 g |
48 V |
4.724 in (120 mm) |
50.88 W |
1.06 A |
75 °C (167 °F) |
|||
|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
10.1 cfm (17.16 m³/h) |
36 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
0.787 in (20 mm) |
1.575 in (40 mm) |
9000 rpm |
Ball |
Approvals: VDE |
10.57 mmH₂O (103.656 pa) |
33 g |
24 V |
1.575 in (40 mm) |
3.36 W |
140 mA |
70 °C (158 °F) |
|||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
17.3 cfm (29.393 m³/h) |
38 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
2.362 in (60 mm) |
0.591 in (15 mm) |
4500 rpm |
Ball |
Approvals: VDE |
4.97 mmH₂O (48.739 pa) |
44 g |
24 V |
2.362 in (60 mm) |
3.6 W |
150 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
252.85 cfm (429.595 m³/h) |
70.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
1.496 in (38 mm) |
4.724 in (120 mm) |
5500 rpm |
Ball |
Approvals: VDE |
35.877 mmH₂O (351.833 pa) |
380 g |
24 V |
4.724 in (120 mm) |
57.6 W |
2.4 A |
60 °C (140 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
8.54 cfm (14.51 m³/h) |
32 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
0.787 in (20 mm) |
1.575 in (40 mm) |
7600 rpm |
Ball |
Approvals: VDE |
7.69 mmH₂O (75.413 pa) |
33 g |
24 V |
1.575 in (40 mm) |
2.4 W |
100 mA |
70 °C (158 °F) |
||||
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
8.54 cfm (14.51 m³/h) |
32 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
0.787 in (20 mm) |
1.575 in (40 mm) |
7600 rpm |
Ball |
Approvals: VDE |
7.69 mmH₂O (75.413 pa) |
33 g |
24 V |
1.575 in (40 mm) |
2.4 W |
100 mA |
70 °C (158 °F) |
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|
Delta Electronics |
DC Fan |
Plastic |
Axial |
71.27 cfm (121.089 m³/h) |
36.5 dB |
CE; CSA; UL |
-10 °C (14 °F) |
70,000 h |
4.724 in (120 mm) |
1.496 in (38 mm) |
2000 rpm |
Ball |
Approvals: VDE |
4.22 mmH₂O (41.384 pa) |
320 g |
12 V |
4.724 in (120 mm) |
3.6 W |
300 mA |
70 °C (158 °F) |
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|
|
Delta Electronics |
DC Fan |
Plastic |
Axial |
32.9 cfm (55.897 m³/h) |
64 dB |
CE; CUL; UL |
-10 °C (14 °F) |
70,000 h |
0.043 in (1.102 mm) |
0.062 in (1.575 mm) |
25000 rpm |
Ball |
Approvals: TUV |
112.78 mmH₂O (1105.994 pa) |
51 g |
12 V |
0.062 in (1.575 mm) |
17.4 W |
1.45 A |
70 °C (158 °F) |
Industrial fans and blowers are mechanical devices that are used to move air or gas in industrial and commercial settings. They are commonly used for ventilation, cooling, drying, and conveying in applications such as manufacturing, mining, and HVAC systems.
Industrial fans and blowers come in a variety of types, including axial fans, centrifugal fans, and radial fans. Axial fans are the most common type and are used for applications that require a large volume of air to be moved at low pressure. Centrifugal fans are used for applications that require higher pressures, such as in HVAC systems. Radial fans are used for applications that require high flow rates and high pressures, such as in mining operations.
Industrial fans and blowers are powered by electric motors, diesel engines, or steam turbines. They can also be fitted with variable speed drives to control the airflow and pressure output.
Industrial fans and blowers offer several advantages over other types of air handling equipment. They are highly efficient and can move large volumes of air or gas over long distances. They are also highly reliable and can operate continuously for extended periods of time.
However, industrial fans and blowers also have some limitations, such as high noise levels and susceptibility to damage from external factors such as dirt, dust, and debris.