Centrifugal blower

GRM HD 31/4-1 Ex

Article number: 0073.0406
Manufacturer: MAICO
Centrifugal blower made of metal for high-pressure applications, size 310, three-phase AC with 3 kW, for use... more information
Application examples: explosion-proof industrial applications
Product data sheet
GRM HD 31/4-1 Ex IM0020696.PNG Centrifugal blower made of metal for high-pressure applications, size 310, three-phase AC with 3 kW, for use in potentially explosive atmospheres, medium: gas
GRM HD 31/4-1 Ex IM0017898.PNG Centrifugal blower made of metal for high-pressure applications, size 310, three-phase AC with 3 kW, for use in potentially explosive atmospheres, medium: gas
Back
  • On the notes
GRM HD 31/4-1 Ex
GRM HD 31/4-2 Ex
GRM HD 31/6 Ex

Characteristic curve

GRM HD 31/4-1 Ex - Characteristic curve

Dimensioned drawing

GRM HD 31/4-1 Ex - Dimensioned drawing [mm]

GRM HD 31/4-1 Ex - Dimensioned drawing Housing orientation [mm]

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

The GRK 12/2 E and GRK 12/4 D variants are not available in right-hand version RD!

The standard orientation is always LG 270°

Technical data

GRM HD 31/4-1 Ex - Technical data

Article GRM HD 31/4-1 Ex
Model Motor variant 1
Air flow volume 6.200 m³/h
Rotating speed 1.460 1/min
Impeller type radial
Speed controllable ✔
Reversing capacity −
Type of voltage Three-phase AC
Rated voltage 400 V
Frequency 50 Hz
Nominal output 3.000 W
Inom 6,55 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, coated
Colour grey
Weight 55 kg
Weight including packaging 58 kg
Size 310 mm
Width 538 mm
Height 649 mm
Depth 570 mm
Width with packaging 600 mm
Height with packaging 750 mm
Depth with packaging 700 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) 4012799734062
Article number 0073.0406

 

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

Total

LWA5, S5 (dB(A))

60

72

78

81

86

79

71

61

88

LWA5= free inlet sound power level in dB.

Accessories

GRM HD 31/4-1 Ex - Accessories

Specific accessories

Product type Name Art. No. Price*(EUR) Action
Machine protection relay thermistor TMS 0157.0992 on request
  • On the notes
Differential pressure switch DDEx 500 0157.0302 on request
  • On the notes

General accessories

Product type Name Art. No. Price*(EUR) Action
Air outlet grille SGAI GR 31 0073.0429 on request
  • On the notes
Protective grille SGRI 31 0073.0421 on request
  • On the notes
Intake socket ASI 31 0073.0437 on request
  • On the notes

Product description

Productdescription

GRM HD 31/4-1 Ex

short description

Centrifugal blower made of metal for high-pressure applications, size 310, three-phase AC with 3 kW, 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 and approvals in accordance with ATEX.
  • 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 motor base made of epoxy-coated sheet steel, for mounting the fan, is included in the scope of delivery.
  • Centrifugal impellers with forward curved blades made of galvanised sheet steel.

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 is 20 Hz to 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 HD 31/4-1 Ex - Wiring diagram



Predecessor - successor

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