Centrifugal blower

GRM 12/2 D Ex

Article number: 0073.0387
Manufacturer: MAICO
Centrifugal blower, size 120, three-phase AC, for use in potentially explosive atmospheres, medium: gas
Application examples: explosion-proof industrial applications
Product data sheet
GRM 12/2 D Ex IM0020476.PNG Centrifugal blower, size 120, three-phase AC, for use in potentially explosive atmospheres, medium: gas
GRM 12/2 D Ex IM0017898.PNG Centrifugal blower, size 120, three-phase AC, for use in potentially explosive atmospheres, medium: gas
Back
  • On the notes
GRM 12/2 E Ex
GRM 12/2 D Ex

Characteristic curve

GRM 12/2 D Ex - Characteristic curve

Dimensioned drawing

GRM 12/2 D Ex - Dimensioned drawing [mm]

GRM 12/2 D Ex - Dimensioned drawing Housing orientation [mm]

  1. RD Right-hand version
  2. LG Left-hand version

This size cannot be ordered in the versions 45°, 135°, 315°

The standard orientation is always LG 270°

Technical data

GRM 12/2 D Ex - Technical data

Article GRM 12/2 D Ex
Air flow volume 900 m³/h
Rotating speed 2.880 1/min
Impeller type radial
Speed controllable ✔
Reversing capacity −
Type of voltage Three-phase AC
Rated voltage 400 V
Frequency 50 Hz
Nominal output 250 W
Inom 0,62 A
Degree of protection IP 55
Insulation class F
Pole-changeable −
Installation site Duct connection
Installation position Horizontal
Material Sheet steel, galvanised
Housing material Steel
Colour grey
Weight 10 kg
Weight including packaging 10,6 kg
Size 120 mm
Width 300 mm
Height 272 mm
Depth 246 mm
Width with packaging 400 mm
Height with packaging 335 mm
Depth with packaging 290 mm
EX designation in accordance with the ATEX Directive Ex II 2 G
EX designation in accordance with standard Ex db IIB+H2 T4 Gb X / Ex h IIB+H2 T4 Gb X
Ta ambient temperature -20 °C ≤ Ta ≤ +40 °C
Operating mode S1
PTC DIN 44082 M 100
Temperature class T4
Packing unit 1 piece
Range C
GTIN (EAN) 4012799733874
Article number 0073.0387

 

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

Total

LWA5, S5 (dB(A))

44

54

68

73

69

74

69

65

78

LWA5= free inlet sound power level in dB.

Accessories

GRM 12/2 D Ex - Accessories

Specific accessories

Product type Name Art. No. Price*(EUR) Action
Transition adapter URRI 12 0073.0298 on request
  • On the notes
Machine protection relay thermistor TMS 0157.0992 on request
  • On the notes
Differential pressure switch DDEx 500 0157.0302 on request
  • On the notes
Motor base MSI 12 0073.0294 on request
  • On the notes

General accessories

Product type Name Art. No. Price*(EUR) Action
Air outlet grille SGAI 12 0073.0289 on request
  • On the notes
Inlet protective grille SGEI 12 0073.0285 on request
  • On the notes

Product description

Productdescription

GRM 12/2 D Ex

short description

Centrifugal blower, size 120, three-phase AC, for use in potentially explosive atmospheres, medium: gas

Product description

Features

  • Centrifugal blower made of metal for applications in areas subject to explosion hazards.
  • Explosion protection tested in accordance with Directive 2014/34/EU.
  • Qualified for all gases and vapours of Ex group IIA and IIB and also for hydrogen.
  • Ex II 2 G Ex db IIB+H2 T4 Gb X / Ex II 2 G Ex h IIB+H2 T4 Gb X.
  • 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 potentially explosive atmospheres.
  • For zone 1 and 2.
  • Types of ignition protection: “d” – pressure-proof housing and “c” – constructional safety.
  • Powerful fans for industrial applications.
  • For simple and direct mounting on a duct system.
  • The motor is outside the air flow.
  • Sheet steel housing.
  • Standard orientation for LG 270° housing.
  • Suitable for temperature ranges from -20 °C to +40 °C.
  • The intake socket, made of coated sheet steel, is included in the scope of delivery.
  • Centrifugal impellers with forward curved blades made of galvanised sheet steel.

Three-phase AC motor

  • Three-phase AC motor.
  • IP 55 degree of protection.
  • IE3 motor.
  • S1 operating mode (continuous operation).
  • Temperature class T4.
  • Speed-controllable with frequency converter.
  • Permissible frequency range for speed control with frequency converter 20-50 Hz.
  • 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.

Electrical connection

  • Connection in the terminal box on the motor.
  • Cable screw connection, in Ex d version, included in the scope of delivery.

Special versions

  • The following special versions are available on request, at an extra cost:
    • Deviating housing orientation.

Table of contents

Wiring diagram

GRM 12/2 D Ex - Wiring diagram



Predecessor - successor

Notes
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