Range of cylindrical cased axial flow fans with motor located externally to the fan casing and incorporating a belt driven impeller making this range suitable for continuous operation up to 120ºC. The casings are manufactured from high grade rolled sheet steel protected against corrosion by cataforesis primer and black polyester paint finish. The drive system consists of an industrial poly V-belt drive pulley system which is enclosed within metal protective guard. All models incorporate diecast aluminium impellers available with 2 or 3 fixed blade angles. The impellers are finished in red colour epoxypolyester paint coating.

All the motors are IP55 class F, fitted with ball bearings greased for life.
Electrical supplies:Three phase 230/400V-50Hz or 400V-50Hz (See characteristics chart).
Additional Information
Standard air direction: form (A) configuration (Motor over Impeller).NI versions incorporate safety switch, stop/start.

On request
NI versions: fitted with ON/OFF isolation switch.Single phase 230V-50Hz motors (up to 1.5 kW).


ATEX versionsOn request, explosion proof versions in accordance with ATEX Directive, for 3 phase models.
For ambient working temperatures from -20ºC to +40ºC.
Air direction motor- impeller (A flow)
– ATEX Flameproof – Gas
II 2G Ex d IIB T4
II 2G Ex d IIB+H2 T4 (with Ex d IIC T4 motor)
– ATEX Increased safety – Gas
II 2G Ex e II T3
– ATEX – Dust
Suspended flammable particles and nonconductive dust:
II 3D Ex tc IIIB T125ºC
Conductive dust:
II 3D Ex tc IIIC T125ºC (with IP65 motor)
To select TTT-N ATEX refer to Easyvent.Note electrical data may vary for ATEX motors.Consult availability for other ATEX motor versions.


  • TTT-Nbdp506

    Easy to mantain
    Swing-out fan casing assembly provides an easy access for cleaning or maintenance.

  • TTT-Nbdp487

    Dynamically balanced impeller
    Impellers are dynamically balanced, according to ISO 1940, providing vibration free operation and coated with a special low friction paint repelling the dirtiness.

  • TTT-Nbdp481

    ON/OFF isolation switch
    NI versions incorporate safety switch, stop / start.


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