The HELI VARD 280/4 TK RADAX high-pressure duct fan from Helios is a powerful ventilation fan designed for use in demanding applications. With its cylindrical duct sleeve and flanges on both sides, it allows for easy installation in various ventilation systems. The fan is directly driven and made of galvanized sheet steel, giving it high robustness. The semi-axial impeller with eight spatially curved blades made of thermoplastic ensures efficient air transport and vibration-free operation. Dynamic balancing according to quality grade G 6.3 in accordance with VDI 2060 and DIN ISO 1940 guarantees high running smoothness. The three-phase squirrel cage motor is maintenance-free and equipped with thermal contacts to prevent overheating. The closed design and low-noise ball bearing with long-term lubrication contribute to the longevity and reliability of the device.

• Cylindrical duct sleeve with flanges on both sides for easy installation
• Dynamic balancing according to quality grade G 6.3 for vibration-free operation
• Maintenance-free three-phase squirrel cage motor with thermal contacts
• Semi-axial impeller with eight spatially curved blades for high efficiency
• Low-noise ball bearings with long-term lubrication for extended lifespan.