Helios Ventilatoren 8694 KRD 450/4/70/40 duct fan swiveling 3-phase content_copy

Ducted radial fan with backwards curved impeller blades, for direct installation in rectangular duct systems, fan unit can be swung out. Housing made of galvanized sheet steel with standardized duct flange profiles on both sides, space-saving design, easy to service thanks to the swing-out motor-impeller unit, from BG 450 additional locking of the swing-out unit. High-performance radial impeller with backwards curved blades made of plastic and galvanized steel. Vibration-free operation thanks to dynamic balancing in accordance with quality level G 6.3 DIN ISO 1940 T.1. Drive: Three-phase external rotor motor, built-in thermal contacts on terminal board, closed design, speed adjustable via 5-step transformer or electronically (continuously) and control via Helios frequency converter with all-pole sine filter is possible, winding with moisture protection impregnation, maintenance-free, sealed, low-noise ball bearings with long-term lubrication. Mains connection to pre-assembled terminal box (IP54).