Centrifugal blower
GRM HD 25/2 Ex
Manufacturer: MAICO
Centrifugal blower made of metal for high-pressure applications, 2-pole, size 250, three-phase AC, for use in... more information
Application examples: explosion-proof industrial applications
Product data sheet
Characteristic curve
Dimensioned drawing
GRM HD 25/2 Ex - Dimensioned drawing [mm]
GRM HD 25/2 Ex - Dimensioned drawing Housing orientation [mm]
- RD Right-hand version
- 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 25/2 Ex - Technical data
Accessories
GRM HD 25/2 Ex - Accessories
Specific accessories
| Product type | Name | Art. No. | Price*(EUR) | Action |
|---|---|---|---|---|
| Machine protection relay thermistor | TMS | 0157.0992 | on request | |
| Differential pressure switch | DDEx 500 | 0157.0302 | on request |
General accessories
| Product type | Name | Art. No. | Price*(EUR) | Action |
|---|---|---|---|---|
| Air outlet grille | SGAI GR 25 | 0073.0427 | on request | |
| Inlet protective grille | SGEI M 20-25-50 | 0073.0420 | on request | |
| Intake socket | ASI 25 | 0073.0435 | on request |
Product description
Productdescription
GRM HD 25/2 Ex
short description
Centrifugal blower made of metal for high-pressure applications, 2-pole, size 250, three-phase AC, for use in potentially explosive atmospheres, medium: gasProduct 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.
Wiring diagram
GRM HD 25/2 Ex - Wiring diagram
Downloads / Videos
GRM HD 25/2 Ex - Downloads / Videos
Predecessor - successor
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