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FlexLine Series – FLD634DD

FlexLine Series

Performance Curve - FLD634DD


The FlexLine Series of backward-curved centrifugal fans has been developed for ducted applications requiring high pressures.
They are available in various speed options and 8 sizes, extending from 315 to 710mm diameter.
  • Single-width, single-inlet housings.
  • Robust galvanised steel and aluminium construction.
  • High efficiency, low noise backward-curved centrifugal impellers.
  • Large choice of speeds available.
  • Easy to fit 35mm TDF profile flange connections.
  • To improve energy efficiency, motors can be speed-controlled.
  • Motors complying with Ex d, Ex e, Ex nA and Ex tD. Standards can be fitted.
  • Construction
    Galvanised steel housings with 35mm TDF profile flange connections and spun aluminium inlet cone.
    Includes backward-curved centrifugal impellers.
    Type - standard TEFC squirrel cage induction motors.
    Electricity supply - three-phase to suit a wide range of voltages and frequencies
    Bearings - sealed-for-life, ball.
    The standard motors are speed-controllable using variable speed drives.
    Multi-speed motors can be supplied
    Motors to meet Ex d, Ex e, Ex nA and Ex tD standards can be fitted to some models.
    Internal Thermal Protection
    Thermistors can be supplied on request.
    Air flow tests to BS848:Part 1, 1980
    Noise tests to BS848:Part2, 1985

    Suggested Specification

    The duct mounted fans shall be of the FlexLine® Series as designed and manufactured by Fantech Pty Ltd and be of the model numbers shown on the schedule/drawings.
    They shall include galvanised steel housings with 35mm TDF profile flange connections and spun aluminium inlet cones.
    The backward-curved centrifugal impellers shall be driven by standard TEFC motors as nominated.
    All models shall be fully tested as a complete assembled unit to BS848:Part 1, 1980 for air flow and BS848:Part 2, 1985 for noise.

    Technical Data - FLD634DD

    Speed [rps]Avg. dBA @ 3mkWatts (Input)Amps Max.°C Approx. Weight [kg]

    Sound Data

    Type631252505001K 2K4K8K
    Inlet9599 958384 828381



    *All dimensions in mm, unless otherwise stated

    Wiring Diagram

    Diagram shown is for single-speed only.
    For 2-speed and special motors, contact Fantech for details.


    Elta Group