Axial wall fan

DZS 25/4 B Ex e

Article number: 0094.0118
Manufacturer: MAICO
Axial wall-mounted fan with steel wall ring, DN250, three-phase AC, explosion-proof, medium: gas
Application examples: Environment with explosion hazard (zone 1 and 2), Dye shop, Battery room, Laboratory, Workplace
Product data sheet
DZS 25/4 B Ex e IM0008702.PNG Axial wall-mounted fan with steel wall ring, DN250, three-phase AC, explosion-proof, medium: gas
DZS 25/4 B Ex e IM0019950.PNG Axial wall-mounted fan with steel wall ring, DN250, three-phase AC, explosion-proof, medium: gas
DZS 25/4 B Ex e IM0017898.PNG Axial wall-mounted fan with steel wall ring, DN250, three-phase AC, explosion-proof, medium: gas
Back
  • On the notes
DZQ 25/4 B Ex e
DZS 25/4 B Ex e
DZQ 25/2 B Ex e
DZS 25/2 B Ex e

Characteristic curve

DZS 25/4 B Ex e - Characteristic curve

Dimensioned drawing

DZS 25/4 B Ex e - Dimensioned drawing [mm]

  1. Steel wall plate = EZQ/DZQ model
  2. Steel wall ring = EZS/DZS model

Technical data

DZS 25/4 B Ex e - Technical data

Article DZS 25/4 B Ex e
Model Steel wall ring
Air flow volume 950 m³/h
Rotating speed 1.475 1/min
Impeller type axial
Speed controllable ✔
Reversing capacity ✔
Type of voltage Three-phase AC
Rated voltage 400 V
Frequency 50 Hz
Nominal output 38 W
cosφ 0,28
Inom 0,19 A
Imax at UNominal 0,19 A
Degree of protection IP 64
Insulation class F
Installation site Wall / Ceiling
Type of installation Surface-mounted
Installation position vertical / horizontal
Material Sheet steel, galvanised
Housing material Sheet steel, galvanised
Colour galvanised
Weight 6,88 kg
Weight including packaging 7,76 kg
Nominal size 250 mm
Width 400 mm
Height 400 mm
Depth 245 mm
Width with packaging 365 mm
Height with packaging 315 mm
Depth with packaging 365 mm
EX designation in accordance with the ATEX Directive Ex II 2 G
EX designation in accordance with standard Ex eb IIB + H2 T3 Gb / Ex h IIB + H2 T3 Gb
Ta ambient temperature -20 °C ≤ Ta ≤ +60 °C
IA/IN 3,7
Time tA 450 sek
Operating mode S1
PTC DIN 44082 M 100
EC type examination certificate TÜV-A 19 ATEX0102 X, IECEx EPS 19.0018X
Temperature class T3
Temperature class of insulating materials Th. Cl. 155 (F)
Packing unit 1 piece
Range C
GTIN (EAN) 4012799941187
Article number 0094.0118

 

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

Total

LWA7, high (dB(A))

–

–

–

–

–

–

–

–

65

LWA7= housing and free inlet sound power level in dB.

Product description

Productdescription

DZS 25/4 B Ex e

short description

Axial wall-mounted fan with steel wall ring, DN250, three-phase AC, explosion-proof, medium: gas

Product description

Product model

  • Three-phase AC motor
  • Ex II 2G Ex eb IIB+H2 T3/T4 Gb X / Ex II 2G Ex h IIB+H2 T3/T4 Gb X.
  • For usage temperatures of -20°C ≤ Ta ≤ +60°C.
  • Can be switched to ventilation or air extraction.

Special features

  • Axial wall fan, explosion-proof, medium: gas.
  • Explosion protection and approvals in accordance with ATEX and IECEx.
  • Qualified for all gases and vapours of Ex group IIA and IIB and also for hydrogen.
  • MAICO Ex fans fulfil the safety requirements of European Directive 2014/34/EU for units and protective systems in potentially explosive atmospheres.
  • For zones 1 and 2.
  • Types of ignition protection: “e”- increased safety and “c”- constructional safety.
  • IP 64 degree of protection.
  • Protective grille on the intake side, protection against accidental contact in accordance with DIN EN ISO 13857.
  • Can be fitted in any position.

Model series

  • EZQ / DZQ .. Ex e with square wall plate.
  • EZS / DZS .. Ex e with steel wall ring.

Impeller

  • Axial impeller made of conductive plastic.
  • Balance quality of the motor/impeller combination G 6.3 according to category BV-3 in accordance with ISO 14694.

Air flow direction

  • The air flow direction is marked.
  • Standard exhaust air mode, air flow direction with air drawn across motor.

Three-phase AC motor

  • Robust three-phase AC motor with ball bearings, maintenance-free.
  • Reversible.
  • Reversing mode: The volumetric flow is reduced by approx. 35 % with abnormal air flow direction.
  • S1 operating mode (continuous operation).
  • Speed control permitted with TR... transformer. Exception: DZ.. 35/2 B Ex...
  • The temperature in the fan motor 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.

Electrical connection

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

DZQ/DZS Ex .. required safety technology.

  • A PTC thermistor triggering device is needed to fuse the DZQ/DZS-Ex units.
  • Maico provides the MVS 6 PTC thermistor triggering device and TMS for this purpose.
  • MVS 6 thermistor triggering device.
    • Independent complete system.
    • For monitoring the maximum motor temperature.
    • Type-examination tested according to Directive 2014/34/EU (ATEX).
    • Installation exclusively in non-explosive areas.

  • TMS thermistor machine protection relay.
    • For monitoring the maximum motor temperature.
    • Suitable for installation in control cabinets.
    • Type-examination tested according to Directive 2014/34/EU (ATEX).
    • Installation exclusively in non-explosive areas.

Special versions

  • Special voltages are available as special versions on request and at 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

DZS 25/4 B Ex e - Wiring diagram



Predecessor - successor

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