HRFW 250/4 EX – Cased Axial Fan – Helios
Axial high-performance fan, tubular sleeve, cylindrical, flanges on both sides, directly driven.
Cylindrical pipe made of galvanized sheet steel, encircling with impeller, molded flange on both sides, hole pattern according to DIN 24155. With external terminal box.
Impeller with 7 blades made of thermoplastic. High efficiency, low operating noise. Vibration-free running due to dynamic balancing according to quality level G 6.3 VDI 2060 and DIN ISO 1940.
Single-phase AC capacitor motor, closed design, maintenance-free, with thermal contacts built into the winding, speed-controllable by voltage reduction, sealed, low-noise ball bearings with long-term lubrication, reversible.