Axial roof fan

DZD 50/4 B Ex e

Article number: 0087.0807
Manufacturer: MAICO
Axial roof fan, horizontal air outlet, DN 500, three-phase AC, explosion proof
Application examples: Environment with explosion hazard (zone 1 and 2), Dye shop, Battery room, Workplace, Storage facility
DZD 50/4 B Ex e IM0009964.PNG Axial roof fan, horizontal air outlet, DN 500, three-phase AC, explosion proof
DZD 50/4 B Ex e IM0017898.PNG Axial roof fan, horizontal air outlet, DN 500, three-phase AC, explosion proof

Characteristic curve

DZD 50/4 B Ex e - Characteristic curve

Dimensioned drawing

DZD 50/4 B Ex e - Dimensioned drawing [mm]

Technical data

DZD 50/4 B Ex e - Technical data

Article DZD 50/4 B Ex e
Air flow volume 5.830 m³/h
Rotating speed 1.425 1/min
Impeller type axial
Air direction Ventilation and air extraction
Speed controllable
Reversing capacity
Type of voltage Three-phase AC
Rated voltage 400 V
Frequency 50 Hz
Nominal output 485 W
cosφ 0,76
Inom 0,92 A
Imax at UNominal 1,7 A
Degree of protection IP 54
Insulation class F
Installation site Roof
Installation position vertical
Housing material Sheet steel, galvanised
Weight 39 kg
Nominal size 500 mm
Width 940 mm
Height 420 mm
Depth 940 mm
EX designation in accordance with the ATEX Directive Ex II 2 G
EX designation in accordance with standard Ex e IIB + H2 T3 Gb
Ta ambient temperature -20 °C ≤ Ta ≤ +40 °C
IA/IN 4,1
Time tA 240 sek
Operating mode S1
PTC DIN 44082 M 130
EC type examination certificate EX5 03 06 39250 0074
Temperature class T3
Temperature class of insulating materials Th. Cl. 155 (F)
Packing unit 1 piece
Range C
GTIN (EAN) 4012799878070
Article number 0087.0807


63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz


LWA5, high (dB(A))


LWA5= free inlet sound power level in dB.

Product description


DZD 50/4 B Ex e

short description

Axial roof fan, horizontal air outlet, DN 500, three-phase AC, explosion proof

Product description


  • Explosion protection in accordance with ATEX.
  • Ex II 2G Ex e IIB+H2 T3/T4 Gb.
  • For usage temperatures of -20°C ≤ Ta ≤ +40°C.
  • MAICO Ex fans fulfil the safety requirements of European Directive 2014/34/EU for units and protective systems in explosion-endangered areas.
  • For zone 1 and 2.
  • Base plate, intake nozzle and rain protection cover made of galvanised sheet steel.
  • Horizontal air outlet direction.
  • Sturdy eyebolts enable transport by crane.
  • Can be switched to ventilation or air extraction.
  • Reversing mode: The volumetric flow is reduced by approx. 35 % with abnormal air flow direction.


  • Robust motor with ball bearings, maintenance-free.
  • Motor protection class IP 54.

Electrical connection

  • Connecting cable, approx. 1.7 m long.
  • Separate terminal box, explosion proof, with cable screw-connections.

Safety instructions

  • Speed control permitted with transformer TR.... Exception: DZ.. 35/2 B Ex e.
  • The temperature in the fan unit is monitored by PTC thermistors. The PTC thermistors must be connected to a triggering system (safety device according to Directive 2014/34/EU), that separates the fan permanently from the power if the temperature gets too hot.
  • The MAICO PTC thermistor triggering device MVS 6 or TMS is recommended as the triggering system.
  • The fan may be operated only if the protection against accidental contact with the impeller is guaranteed to be in accordance with DIN EN ISO 13857 for fans with free inlet and outlet, e.g. with an SG protective grille.

Special versions

  • Special voltages are available as special versions on request, at an extra cost.
  • Information on operation at temperatures occasionally below -20 °C available upon request.
  • Feasibility must be checked in each case.

Table of contents

Wiring diagram

DZD 50/4 B Ex e - Wiring diagram

Predecessor - successor

DZD 50/4 B Ex e - Predecessor

Product type Name Art. No. Action
Axial roof fan DZD 50/4 A-Ex No longer available for delivery 0087.0786
  • On the notes

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