Axial fans

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Effects caused by obstructions on the inlet side for constant air flowEC centrifugal blowersConstant air flow is attained with unimpaired inflow only.An obstructed (e. g. asymmetrical or partially blocked) air flow can have asignificant effect on the curve behaviour and cause large deviations froma constant air flow curve.Examples of obstructed inflowsXInstructions for designing a sufficiently unobstructed inflow:– The distance x between the blower intake and neighbouring walls orobstructions should be at least 25 % of the impeller diameter.– Inflows with angular momentum or asymmetrical rotation should beavoided.– The inflow can be made more uniform using resistances such as thosefrom filters or grilles.On request, we offer calibrated blower designs that incorporate a specificinstallation situation.406
AC axialK seriesTechnologyAC axialA seriesAccessoriesEC axial fansEC axialS seriesQ-motorESMEC-SYSTEMSAC axialS seriesAC axial fansGeneralinformationDiagonal fans (axial design)Operating rangeDirectly to the right of the "saddle" (right part of the airperformance curve):– Maximum efficiency– Minimal noiseTo the left of the "saddle" (left part of the air performance curve):– Stall area– Drop in efficiency– Soaring noiseNoise / efficiency curve[Pa][%][dB(A)]The saddle of the diagonal/mixed flow fan is slightly higher than thatof the axial fan. This means that the technical ratings in the optimaloperating range are better than those of the axial fan.The optimum operating range of the fan is shaded in green in thecurve given here.00stall areaoptimum operating range[m³/h]Mounting informationThe conical housing (part of delivery) makes sure the necessary gapdimension is kept.EffectsThe effects of the diagonal/mixed flow fan are similar to those listedfor the axial fan (p. 397-400).407Contacts
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Axial fansversion 07The engineer’
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AC axialK seriesEC axialS seriesEC
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