How it works
Two impellers are mounted in series and rotate in opposite directions, so no guide vanes are needed between the stages. Each impeller has its own motor.
Redundancy and part load
One stage delivers about 65 % of the airflow at about 40 % of the power input. If one stage stops, the other keeps extracting. Switching stages and pole numbers gives airflow steps of 100, 65, 50 and 33 %; inverter operation is also possible.
Design
Hubs and blades are cast aluminium and X-ray inspected. The blade pitch is set at standstill to the design point. The casing is galvanised (L) or hot-dip galvanised (H) steel. Motors are IEC squirrel-cage, IP55, insulation class F, 2 to 12 poles, with up to 37 kW per stage on AXG 1600.
Applications
- underground and covered car park ventilation where the rules require two independent stages (for example the German garage regulations and VDI 2053);
- duct systems with high resistance;
- industrial systems with high pressure.
For smoke exhaust, the manufacturer’s operating instructions describe F300/F400 high-temperature versions. We confirm the class and the availability for the required size at selection. The single-stage alternative is AXV / BXV.
Technical data
| Temperature rating | −40…+40 °C; F300/F400 on request |
|---|---|
| Sizes | 315–1600 |
| Motor | IEC squirrel-cage (EPACT on request), IP55, class F, 2 to 12 poles; two- and three-speed; up to 37 kW per stage (AXG 1600) |
| Materials | L version — galvanised sheet steel, H — hot-dip galvanised steel; hubs and blades — cast aluminium, X-ray inspected, pitch adjustable at standstill |
| Mounting | Horizontal or vertical; arrangements S, SU, SO, D, DU, DO |
| Size range | 315, 355, 400, 450, 500, 560, 630, 710, 800, 900, 1000, 1120, 1250, 1400, 1600 |
| Pressure | up to nearly 3,500 Pa per the manufacturer’s website; up to nearly 5,000 Pa per the 2006 catalogue |
| Airflow | approx. up to 175,000 m³/h (upper end of the selection charts) |
| One stage running | about 65 % of the airflow at about 40 % of the power |
| Airflow steps | 100 / 65 / 50 / 33 % by switching stages and poles; inverter operation possible |
| Testing | performance to ISO 5801, installation category D |
| Energy efficiency | declaration under Directive 2009/125/EC and Regulation (EU) 327/2011 (2015) |
| Type code example | AXG B 450-7/26 LL-2 SU — size and blades / pitch / casing / poles / arrangement |
Versions
- AXG — standard version
- AXG B — for building into a unit
- AXG D — with an acoustic package on the casing
- Casings SL, SH, LL, LH: L — galvanised sheet steel, H — hot-dip galvanised
- Explosion-proof motors and an anti-spark rubbing strip for hazardous areas on request
Accessories
- Impeller- or motor-side guard
- Bellmouth inlet
- Mounting feet, counter flanges, flexible connectors
- Anti-vibration mounts
- Backdraft dampers
- Silencers, with or without a pod
- Frequency inverter
Manufacturer documentation is available on request — name the series in the enquiry form.
