Axial fans

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Single and dual inlet centrifugal blowerswith forward curved bladesThe forward curved centrifugal impeller must always be operated insidea scroll housing.A dual inlet centrifugal blower shows the same behaviour as two singleinlet blowers operated in parallel: with size, speed and pressure beingidentical, double the air flow is achieved.Operating rangeMiddle part of air performance curve:– Maximum efficiency– Minimal noise– Higher performance density than with the backward curvedcentrifugal fanTo the right and the left of the middle part of the air performance curve:– Reduced efficiency– Increasing noiseThe optimum operating range of the fan is shaded in green in the curvegiven here.Noise / efficiency curve[Pa][%][dB(A)]optimum operating range00[m³/h]Dimensioning of the scrollThe dimensions of a typical scroll can be calculated with the followingformulae, subject to the impeller diameter D:CDB45˚45˚45˚JAK45˚E45˚26˚45˚FHGA = 1.062 · DB = 0.992 · DC = 0.922 · DD = 0.853 · DE = 0.784 · DF = 0.715 · DG = 0.646 · DH = 0.612 · DJ = 0.720 · DK = 0.689 · DR = 0.073 · DAdjusting the dimensions to diminished mounting spaces is possible.R404
TechnologyAC axialA seriesEC axial <strong>fans</strong>EC axialS seriesAC axialK seriesAC axialS seriesAC axial <strong>fans</strong>GeneralinformationEffects of step diffusersA diffuser mounted on the exhaust side with connected exhaust tunnelincreases air performance and efficiency of the centrifugal blower.Curve[Pa][%]1without step diffuser2with step diffuser121200[m³/h]Effects of obstructions on the intake sideObstructions on the air intake side reduce the air performance of thecentrifugal blower.Curve[Pa]Q-motor1x / D = ESM2x / D = 30 %3x / D = 23 %D45x / D = 15 %x / D = 7.5 %EC-SYSTEMSXX0054321[m³/h]Accessories405Contacts
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Axial fansversion 07The engineer’
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AC axialS seriesAC axial fansGenera
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AC axialK seriesEC axialS seriesEC
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AC axialK seriesAC axialS seriesAC
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AC axial fans S seriesTechnologyAcc
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