Helios Duct fan KRD 450/4/70/40
€1,692.36
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Duct-mounted centrifugal fan with backward-curved impeller blades, for direct installation in rectangular duct systems; fan unit can be swung out.
Housing made of galvanised sheet steel with standardised duct flange profiles on both sides, space-saving design, easy to service thanks to swing-out motor/impeller unit; from size 450, additional locking of the swing-out unit.
High-performance centrifugal impeller with backward-curved blades made of plastic and galvanised steel. Vibration-free operation through dynamic balancing to quality grade G 6.3 in accordance with DIN ISO 1940 Part 1.
Drive: Three-phase external-rotor motor, integrated thermal contacts routed to the terminal board, enclosed design, speed controllable using a 5-step transformer or electronically (continuously variable); control via a Helios frequency converter with all-pole sine filter is also possible. Winding with moisture-protection impregnation, maintenance-free, sealed low-noise ball bearings with long-term lubrication. Mains connection to pre-installed terminal box (IP54).
| Degree of protection: | IP 54 |
|---|---|
| Height: | 443 mm |
| Width: | 743 mm |
| Material: | Housing made of galvanized sheet steel; Impeller made of Plastic and galvanized Steel |
| Duct dimension: | 700/400 mm |
| Airflow rate: | 5830 m³/h |
| Controllability: | Transformer / Electrically / Frequency converter |
| Current uncontrolled: | 2,8/1,6 A |
| Depth: | 787 mm |
| Installation: | Duct |
| Number of poles: | 4 |
| Permissible medium temperature: | 40 °C |
| Rated power: | 0.818 kW |
| Rated speed: | 1430 |