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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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Part Details Brand Stock For Use With Inner Diameter Outer Diameter Depth
Fan Inlet Ring for use with Backward Curved Centrifugal Fan, ebm-papst Impeller 133 ebm-papst 19 Backward Curved Centrifugal Fan, ebm-papst Impeller 133 87mm 129mm 13mm
Fan Inlet Ring for use with U97EM series fans Micronel 16 U97EM series fans 34mm 37mm -
Fan Inlet Ring for use with Backward Curved Centrifugal Fan, ebm-papst Impeller 225 ebm-papst 11 Backward Curved Centrifugal Fan, ebm-papst Impeller 225 146mm 223mm 28mm
Fan Inlet Ring for use with U97EM series fans Micronel 4 U97EM series fans 34mm 37mm -
Fan Inlet Ring for use with Backward Curved Centrifugal Fan ebm-papst 3 Backward Curved Centrifugal Fan 280mm 310mm -
Fan Inlet Ring for use with Airflow Measurement ebm-papst 0 Airflow Measurement - 400mm -
Fan Inlet Ring for use with Backward Curved Centrifugal Fan ebm-papst 0 Backward Curved Centrifugal Fan 325mm 330/355mm -
Fan Inlet Ring for use with Backward Curved Centrifugal Fan ebm-papst 0 Backward Curved Centrifugal Fan 390mm 450mm -
Fan Inlet Ring for use with Backward Curved Centrifugal Fan, ebm-papst Impeller 175/190 ebm-papst 0 Backward Curved Centrifugal Fan, ebm-papst Impeller 175/190 125.5mm 170mm 14mm
Fan Inlet Ring for use with Backward Curved Centrifugal Fan, ebm-papst Impeller 220 ebm-papst 0 Backward Curved Centrifugal Fan, ebm-papst Impeller 220 155mm 252mm 21mm
Fan Inlet Ring for use with Backward Curved Centrifugal Fan, ebm-papst Impeller 250 ebm-papst 0 Backward Curved Centrifugal Fan, ebm-papst Impeller 250 164.5mm 255mm 31mm
Fan Inlet Ring for use with Backward Curved Centrifugal Fan, ebm-papst Impeller 270/280 ebm-papst 0 Backward Curved Centrifugal Fan, ebm-papst Impeller 270/280 182.5mm 280mm 35mm
Fan Inlet Ring for use with ebm-papst Impeller 160, Forward Curved Centrifugal Fan ebm-papst 0 ebm-papst Impeller 160, Forward Curved Centrifugal Fan 130mm 185mm 17mm
Fan Inlet Ring for use with ebm-papst Impeller 180, Forward Curved Centrifugal Fan ebm-papst 0 ebm-papst Impeller 180, Forward Curved Centrifugal Fan 149mm 210mm 28mm
Fan Inlet Ring for use with ebm-papst Motorized Impeller 310 ebm-papst 0 ebm-papst Motorized Impeller 310 193mm 300mm 43mm
Fan Inlet Ring for use with ebm-papst R4D310-AR ebm-papst 0 ebm-papst R4D310-AR 208.1mm 300mm 48mm
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