Centrifugal Fans

Centrifugal fans are also known as blowers and normally constructed as a fixed drum shape composed with a number of fan blades (impellers), the impellers rotate and blow air or gas from one place to another. Centrifugal fans are used wherever airflow is needed for aspirating, cooling, ventilating and conveying. Centrifugal fans can be single or multi-stage blowers: Single stage blowers are ideal when a uniform airflow is required, Multi-stage is more suited when a varying airflow is required at a fixed pressure.

Features and Benefits

Various IP ratings are available, including IP68, if it needs to be placed in a harsh environment. A choice of different fan speeds from 780 rpm all the up to 11500 rpm. Both backward and forward facing fan blades

Factors to consider when choosing:

  • Pressure requirements
  • Flow requirements
  • Gas consumption
  • Inlet temperature
  • Ambient Temperature
  • Operating altitude of the blower

Where are blowers used?

Blowers are widely used in all manner of everyday items, such as:

  • HVAC systems
  • Dust control
  • Pressure Blowers
  • Air Conditioners
  • Vacuum cleaners
  • Air conveyor systems

What is the difference between a centrifugal fan and an axial fan?

Axial fans are used for high flow rates and low pressures with flow rate parallel to the axis of the fan. The blades of these fans are available in different shapes such as aerofoil, sickle paddle, and various pitch. They are commonly used for cooling and ventilation.

In Centrifugal fans the airflow changes direction twice, once when it enters the fan and secondly when it leaves the fan, These fans have paddle blades forward curved blades, backward curved blades and radial blades. Centrifugal fans move air radially. The airflow created passes through a system of tubes or ducts which creates a higher pressure airflow, making them ideal for high-pressure applications such as cooling and heating systems, dust control, transporting materials and air conveyor systems.


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Description Price Supply Voltage Blower Type AC or DC Operation Air Flow Series Height Width Depth Dimensions Fan Speed Noise Level Bearing Type Mounting Hole Spacing Commutation Type
RS Stock No. 825-7721
Mfr. Part No.R2E225-BE51-09
Brandebm-papst
HK$1,862.43
Each
units
115 V ac Centrifugal AC - R2E225 - 225mm 107mm 225 (Dia.) x 107 Dmm 3000rpm >70dB(A) Ball - -
RS Stock No. 892-1826
Mfr. Part No.DR656CK72X/080582
BrandAmetek
HK$38,236.83
Each
units
230 V ac, 460 V ac Regenerative AC 350.49m³/h DR656 382.5mm 390.5mm 444.5mm 390.5 x 382.5 x 444.5mm - - Ball - -
RS Stock No. 892-3614
Mfr. Part No.150531-50
BrandAmetek
HK$21,664.16
Each
units
120 V ac Blower Ac - Nautilair 12.3" 314.73mm 332.83mm 222.25mm 332.83 x 314.73 x 222.25mm - - - - Brushless
RS Stock No. 892-3465
Mfr. Part No.119378-01
BrandAmetek
HK$8,432.88
Each
units
24 V dc Blower DC 74.76m³/h Minijammer 5.0" 127mm 127mm 71.6mm 127 x 127 x 71.6mm - - - - Brushless
RS Stock No. 825-7771
Mfr. Part No.R2S175-AB56-30
Brandebm-papst
HK$1,300.75
Each (In a Pack of 6)
units
230 V ac Centrifugal AC 440m³/h R2S175 - 175mm 69mm 175 (Dia.) x 69 Dmm 2350rpm 61dB(A) Ball - -
RS Stock No. 841-4895
Mfr. Part No.D3G146-AH50-11
Brandebm-papst
HK$3,349.16
Each
units
200 → 277 V ac Centrifugal AC 645m³/h D3G146 219mm 206mm 270mm 219 x 206 x 270mm 1700rpm - Ball 126 x 254mm Electronic
RS Stock No. 892-3386
Mfr. Part No.119003-01
BrandAmetek
HK$3,507.50
Each
units
- - - - - - - - - 4228rpm - - - -
RS Stock No. 250-965
Mfr. Part No.RL65-21/12H
Brandebm-papst
HK$575.89
Each
units
12 V dc Centrifugal DC 61m³/h RL65 93.5mm 97mm 33mm 93.5 x 97 x 33mm 4900rpm 66dB Ball 71 x 71mm Electronic
RS Stock No. 892-1905
Mfr. Part No.EN6F5L (038361)
BrandAmetek
HK$82,352.90
Each
units
230 V ac Regenerative AC 350.49m³/h EN6 529.2mm 416.1mm 423.9mm 416.1 x 529.2 x 423.9mm - - Ball - -
RS Stock No. 892-3774
Mfr. Part No.515134
BrandAmetek
HK$3,493.09
Each
units
- - - - - - - - - - - - - -
RS Stock No. 826-1297
Mfr. Part No.G2E146-BF05-29
Brandebm-papst
HK$3,552.44
Each
units
115 V Centrifugal AC - G2E 146 - - - - - - - - -
RS Stock No. 892-1683
Mfr. Part No.DR14DW86MW/081479
BrandAmetek
HK$215,621.81
Each
units
575 V ac Regenerative AC 1752.45m³/h DR14 701mm 446.3mm 801.4mm 446.3 x 701 x 801.4mm - - - - -
RS Stock No. 892-3544
Mfr. Part No.150186-50
BrandAmetek
HK$10,064.91
Each
units
12 V dc Blower DC 270.99m³/h Nautilair 7.6" 189.5mm 204.22mm 136.7mm 204.22 x 189.5 x 136.7mm - - - - Brushless
RS Stock No. 892-3403
Mfr. Part No.119151-51
BrandAmetek
HK$12,831.79
Each
units
240 V ac Blower Ac 305.82m³/h Windjammer - Bypass 5.7" 150mm 150mm - - - - - - Brushless
RS Stock No. 830-3023
Mfr. Part No.R3G190-RC05-03
Brandebm-papst
HK$1,726.76
Each
units
230 V ac Centrifugal AC 735m³/h RadiCal - 190 (Dia.)mm 71.4mm 190 (Dia.) x 71.4mm 3200rpm - Ball - Electronic
RS Stock No. 124-3363
Mfr. Part No.CREB250ST-92-00 17000469A
HK$2,159.87
Each
units
230 V ac Centrifugal AC 765cfm CREB250 250mm 250mm 125mm 250 x 250 x 125mm 2760rpm 71dB(A) Ball 125mm -
RS Stock No. 825-7695
Mfr. Part No.R2E220-AB08-12
Brandebm-papst
HK$1,286.20
Each
units
115 V ac Centrifugal AC 900 m³/h, 990 m³/h R2E220 - 220mm - - 2700 rpm, 3050 rpm 74 dB(A), 75 dB(A) Ball - -
RS Stock No. 826-1326
Mfr. Part No.K3G355-AI56-01
Brandebm-papst
HK$25,781.733
Each (In a Pack of 10)
units
230 V Centrifugal AC - K3G 355 - - - - - - - - -
RS Stock No. 825-7774
Mfr. Part No.R3G220-AE70-01
Brandebm-papst
HK$4,872.61
Each
units
230 V ac Centrifugal AC - R3G220 - 220.9mm 107.5mm 220.9 (Dia.) x 107.5 Dmm 3590rpm - Ball - -
RS Stock No. 892-1696
Mfr. Part No.DR202Y72M/080565
BrandAmetek
HK$20,003.98
Each
units
230 V ac, 460 V ac Regenerative AC 86.78m³/h DR202 254mm 245mm 299mm 245 x 254 x 299mm - - - - -
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