DD/DDD Series

The DD Centrifugal Blowers (double suction) and DDD Centrifugal Blowers (quadruple suction with central motor), are designed for conditioning, heating, refrigeration applications, where good air-flow levels, static pressure and low noise level are required.
29 – 60 W
0,17 – 0,46 A
96 – 280 m3/h
Centrifugal Blowers DD_DDD

Technical specifications

  • Double suction centrifugal blower.

  • Single phase, 2-shaded poles, impedance protected motor, built according to the CE mark requirements, in compliance with EN 60335-1 standard, with self-aligning and self lubricating sleeve bearings with big oil reservoir.

  • Motor with minimum 130 “B” insulation class.

  • Suitable for continuous operation in ambient temperature from -10   °C to +50   °C.

  • Electrical connection by 6,3 x 0,8 mm, radial or axial, male faston-type connectors, directly fixed on coil.

  • Single suction, Ø 67 – Ø 76 mm constant thickness aluminium impeller with forward curved blades and internal reinforcement disc.

  • Housing made of pre-galvanized metal sheet.

On request

  • Version with IMQ – CSV approved motor.

  • Quadruple suction version:
    DDD model (two housings with central motor).

  • Motor with different powers and insulation classes: 155° “F” – 180° “H”.

  • Supply voltage from 12V to 400V 50/60 Hz.

  • Version with dual voltage and/or double speed.

  • Electrical connection by axial male faston-type connectors and/or different cable lengths.

  • Motor coil winding with IP55 protection.

  • Thermal protector and/or thermal fuse.

  • End-shields with IP50 protection class.

  • “HT” version for operation in high temperature.

  • Built in compliance with UL-CSA standards.

  • BB version with two ball bearings 626 ZZ type on the motor.

  • Different motor positions.

Motor position – Radial Faston

Motor position – Axial Faston

Product Identification Code

DDDD: Single
DDD: Double
RMotor position:
R: motor on the right of the air outlet
L: motor on the left of the air outlet
67/76Impeller diameter and height
P.30Motor type
TThermal protection:
T = thermal protector
F = thermal fuse
Blank = impedance protected
1Coil winding code
RElectrical connection:
R = radial faston-type connectors
A = axial faston-type connectors
C = cables
DNMotor position
HTOn request
HT: high-temperature version
IV - IM = low temperature with high relative humidity up to 92% *
INC = coil insulation with IP55 protection *
BBOn request:
BB = ball bearings on motor
230Supply voltage
50Rated frequency

* IV version

Impregnated coil through dip-coating using epoxy transparent paint (standard stator coil dip-coating process).

* IM version

Impregnated coil through dip-coating using transparent epoxy paint with silicone applied on contacts at the end of winding, three-pole wire and coil covered by a nylon cap. The coil is not drowned in the resin but visible; caution should be paid when mounting the motor so that the cap open part faces downward to prevent its filling up with condensate.

* INC version

Coil with IP55 protection, the coil is completely drowned into the epoxy resin.

L . Motor on left side

R .  Motor on right side

Dimensions mm


Dimensions mm


Typical curves

DD 67/76
DD 76/86
DDD 67/76
DDD 76/86