Roof fan DVNF/S

flow rates up to 36,000 m³/h size: 310 - 900 mm (impeller diameter) vertical outlet IEC standard motors as drive suitable for higher conveying temperatures backward curved impellers different models solid weatherproof casing easy to install DVNF with integrated frequency converter The casing of the Rosenberg roof fans (DVNF/S, DVN/S) consists of seawater-resistant aluminium and a base frame with integrated inlet cone. model - DVNF/DVN up to size 500: Base frame with integrated inlet cone made of galvanised sheet steel from size 560: Base frame with integrated inlet cone made of galvanised sheet steel and additional plastic coating model - DVNFS/DVNS Casing with integrated sound insulation (S) ; base frame with integrated inlet cone made of galvanised sheet steel and additional plastic coating up to size 500: Base frame with integrated inlet cone made of galvanised sheet steel from size 560: Base frame with integrated inlet cone made of galvanised sheet steel and additional plastic coating Efficiency-optimised high performance impellers with backward curved blades made of aluminium. The impellers together with the impeller hub are dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11. The impellers are mounted overhung on the shaft of an IEC standard motor type B5. model - DVNF/DVNFS The electrical connection is mounted on the housing by a frequency converter. With model -GS the electrical connection mounted directly by the ON/Off-switch. model - DVN/DVNS The wiring box of the motor is easily accessible.