Helios Radial tube fan

Helios Ventilatoren RR 250 A centrifugal tube fan

Manufacturer: Helios Ventilatoren
Designation: Centrifugal tube fan
Type: RR 250 A
Housing material: Steel, treated
Air volume unloaded: 886 m³/h
Supply voltage: 230 V
Power consumption: 0.115 kW
With thermal protection: Yes
DC motor: No
Indirect drive: No
Electrical connection: Connection terminals
Protection class (IP): IP44
Max. air temperature: 60 °C
Motor with 2 speeds: Yes
Suitable for electronic control: Yes
Suitable for frequency control: No
Suitable for low current control: No
Suitable for transformer control: Yes
Pole-changing: No
Length: 228 mm
Housing diameter: 345 mm
Duct diameter: 250 mm
Connection: Flange

Further details:
Centrifugal tube fan with 2 power stages for direct mounting in the duct system. Designed for conveying medium and small air volumes against high resistance. The casing is made of galvanized sheet steel with round connection pieces adapted to standard ducts. It features a radial impeller with backward curved blades made of galvanized sheet steel, pressed directly onto the motor and dynamically balanced as a unit. The fan operates with low noise and high efficiency. It has a single-phase AC external rotor motor with an enclosed design, maintenance-free, built-in thermal contacts, sealed, and low-noise ball bearings with long-term lubrication. Power control can be achieved by means of an electronic controller, step transformer, or two-stage operation with type DS 2/2 (accessory). EAN: 4010184056522.