Centrifugal roof fan
DRD 31/64 B
No longer available for deliveryManufacturer: MAICO
Centrifugal roof fan, vertical air outlet, DN 315, three-phase AC, pole-changeable
Application examples: Production facility, Workplace, Commercial premises, Industrial building, Restaurant
Product data sheet
Characteristic curve
Dimensioned drawing
DRD 31/64 B - Dimensioned drawing [mm]
- Clear width
- External duct diameter
- Number of holes: 8
Technical data
DRD 31/64 B - Technical data
Accessories
DRD 31/64 B - Accessories
General accessories
Product description
Productdescription
DRD 31/64 B
short description
Centrifugal roof fan, vertical air outlet, DN 315, three-phase AC, pole-changeableProduct description
Features
- Attractive housing made of galvanised sheet-steel.
- Cover easily detachable for cleaning purposes.
- Galvanized protective grille on the discharge side, protection against accidental contact in accordance with DIN EN ISO 13857.
- Sturdy eyebolts enable transport by crane.
- Impeller with blades curved to the rear, dynamically balanced at two levels, in accordance with performance level 6.3, DIN ISO 1940.
- Impeller made of glass-fibre filled polypropylene.
Three-phase AC motor
- DRD model series.
- Rated voltage 400 V, 50 Hz.
- Thermal overload protection as standard feature, except: available on request for pole-changeable fans.
- Potential-free terminal connections, which must be connected to an MV 25 protective motor switch or the control circuit of a contactor.
- Pole-changeable fans: Ensure overload protection is guaranteed by a protective motor switch provided by the customer.
- DRD 25/64 B: Star / delta switch must be provided by the customer.
Electrical connection
- To terminal block in the service switch.
Safety instructions
- The fan can be operated only if the protection against accidental contact with the impeller is guaranteed to be in accordance with DIN EN 13857 for fans with a free inlet.
Special versions
- The following special versions are available at extra cost on request:
- Special voltages and frequencies.
- Single-phase motors with thermal contacts or PTC thermistor, with potential-free terminal connections.
- Fans with enhanced anti-corrosion protection.
- Information on operation at temperatures occasionally below -20°C available upon request.
- If operating with frequency converters, the factory must be consulted.
- Feasibility must be checked in each case.
Wiring diagram
DRD 31/64 B - Wiring diagram
Downloads / Videos
DRD 31/64 B - Downloads / Videos
Predecessor - successor
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