Fan Inlet Rings

Fan inlet rings are devices used to maximise the performance of fans, such as backward curved centrifugal fans, by guiding air into the impeller blade (the rotating part of a fan) inlet. Using a fan at peak efficiency minimises noise emitted and power consumption from the fan whilst delivering optimal performance.

What are fan inlet rings used for?

Fan inlet rings ensure smooth laminar flow (flow in parallel layers, with no disruption between the layers) of air as it enters the impeller.

How do fan inlet rings work?

Fan inlet rings are usually positioned with the ring surrounding the inlet, and slightly overlapping into the interior. This helps to reduce noise induced by turbulence, eliminate flow disturbances before air is let into the fan and keep power consumption to a minimum for maximum efficiency.

Fan inlet rings also serve the critical purpose of blocking exhaust air from re-entering the air intake. Due to the frequent exposure to atmospheric moisture, fan inlet rings are usually made of materials that don’t rust.


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Description Price For Use With Inner Diameter Outer Diameter Depth
RS Stock No. 826-0966
Mfr. Part No.96358-2-4013
Brandebm-papst
MYR86.75
Each
units
Backward Curved Centrifugal Fan, ebm-papst Impeller 225 146mm 223mm 28mm
RS Stock No. 826-0954
Mfr. Part No.9609-2-4013
Brandebm-papst
MYR89.35
Each
units
Backward Curved Centrifugal Fan, ebm-papst Impeller 220 155mm 252mm 21mm
RS Stock No. 825-6416
Mfr. Part No.40075-2-4013
Brandebm-papst
MYR399.96
Each
units
Airflow Measurement - 400mm -
RS Stock No. 826-0944
Mfr. Part No.9566-2-4013
Brandebm-papst
MYR38.95
Each
units
Backward Curved Centrifugal Fan, ebm-papst Impeller 133 87mm 129mm 13mm
RS Stock No. 826-0960
Mfr. Part No.96359-2-4013
Brandebm-papst
MYR120.81
Each
units
Backward Curved Centrifugal Fan, ebm-papst Impeller 250 164.5mm 255mm 31mm
RS Stock No. 826-0979
Mfr. Part No.96360-2-4013
Brandebm-papst
MYR150.18
Each
units
Backward Curved Centrifugal Fan, ebm-papst Impeller 270/280 182.5mm 280mm 35mm
RS Stock No. 826-0957
Mfr. Part No.9588-2-4013
Brandebm-papst
MYR56.49
Each
units
ebm-papst Impeller 160, Forward Curved Centrifugal Fan 130mm 185mm 17mm
RS Stock No. 175-7151
Mfr. Part No.U97XX-009C3
BrandMicronel
MYR97.12
Each
units
U97EM series fans 34mm 37mm -
RS Stock No. 825-6365
Mfr. Part No.31051-2-4013
Brandebm-papst
MYR98.32
Each
units
Backward Curved Centrifugal Fan 280mm 310mm -
RS Stock No. 826-0963
Mfr. Part No.9621-2-4013
Brandebm-papst
MYR158.73
Each
units
ebm-papst Motorized Impeller 310 193mm 300mm 43mm
RS Stock No. 826-0948
Mfr. Part No.9576-2-4013
Brandebm-papst
MYR60.84
Each
units
Backward Curved Centrifugal Fan, ebm-papst Impeller 175/190 125.5mm 170mm 14mm
RS Stock No. 826-0711
Mfr. Part No.51357-2-4013
Brandebm-papst
MYR148.61
Each
units
Backward Curved Centrifugal Fan 325mm 330/355mm -
RS Stock No. 826-0720
Mfr. Part No.54478-2-4013
Brandebm-papst
MYR244.38
Each
units
Backward Curved Centrifugal Fan 390mm 450mm -
RS Stock No. 826-0950
Mfr. Part No.9597-2-4013
Brandebm-papst
MYR80.07
Each
units
ebm-papst Impeller 180, Forward Curved Centrifugal Fan 149mm 210mm 28mm
RS Stock No. 175-7145
Mfr. Part No.U97XX-500A9
BrandMicronel
MYR101.41
Each
units
U97EM series fans 34mm 37mm -
RS Stock No. 860-0260
Mfr. Part No.31050-2-4013
Brandebm-papst
MYR151.278
Each (In a Pack of 5)
units
ebm-papst R4D310-AR 208.1mm 300mm 48mm