Axial high-performance fan with cylindrical tube sleeve, flanges on both sides, directly driven, explosion-proof in accordance with ATEX. Cylindrical tube made of galvanized sheet steel, enclosing the impeller, flange molded on both sides, hole pattern in accordance with DIN 24155. With external terminal box. Impeller with 7 blades made of thermoplastic. High efficiency, low operating noise. Vibration-free operation due to dynamic balancing in accordance with quality level G 6.3 VDI 2060 and DIN ISO 1940. Can be used in the range from -20 °C to +40 °C. Surface resistance less than 1 GOhm. Three-phase squirrel-cage motor, closed design, maintenance-free, sealed, low-noise ball bearings with long-term lubrication, not adjustable. Ex version in accordance with ATEX.