VLB
Table of contents:
Product description
Axial fans with impellers fitted with hubs that allow the blade angle to be changed smoothly during fan operation. The impellers are additionally equipped with special low-noise blades, which is a definite advantage in an open discharge system. They generate a lower noise level. By changing the blade angle, the fan performance is adjusted. Weather-resistant.
- Standard diameter range: Ø800 – 1000mm
- Capacity range: 20000 – 52000m3/h
- Operating temperatures: -20 to +55°C
- Installed motor powers: 2.2 – 5.5kW
- Motor speeds: 1000 min-1
- Motors fitted with maintenance-free bearings
- Motors adapted to speed control by means of a frequency converter as standard
- Steel housings
- Corrosion-protected housing – powder-coated
- Outlet protected with protective mesh
Optional executions
- High-temperature temp. max: 85°C
- Casing made of stainless sheet
- Flow parameters other than standard
Construction
Housing
Motor
Rotor
Housing:
- Machined from structural sheet steel Fitted with a flange and inlet confuser rolled from the casing shell, having connection holes
- Equipped with bolted or welded motor shelf
- Protected against corrosion by powder coating. Painted in colour: RAL 9005 (black)
Housing optional:
- Corrosion protection by hot-dip galvanising
- Housing made of stainless steel, grade 1.4301
- Aluminium enclosure
- Painted in another RAL colour
Motor:
- Asynchronous 3 phase
- Supply voltage: 3~ 230/400V; 400/690V
- Efficiency class : IE3
- Insulation class: F
- Degree of protection: IP 55
- Cast aluminium motor housing
Motor optional execution:
- Supply voltage: 440V, 460V, Supply frequency: 60Hz
- Efficiency class: IE4
- Motor insulation class: H
- Degree of protection: IP 56, IP66
- Winding temperature sensors
Rotor:
- Blades made of composite, hub made of die-cast aluminium
- High flow capacity in the low pressure range
- Dynamically balanced to class G-6.3 according to ISO 1940-1
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