The HELI HQD 250/4 EX axial high-performance fan from Helios is a powerful ventilation fan specifically designed for use in explosion-prone areas. With its square mounting plate and the molded inlet nozzle made of galvanized sheet steel, it offers a robust and durable solution for demanding applications. The fan is directly driven and features high efficiency as well as low operating noise. Thanks to its vibration-free operation, ensured by dynamic balancing according to quality level G 6.3 VDI 2060 and DIN ISO 1940, this model is suitable for continuous operation in a temperature range of -20 °C to +40 °C. The enclosed design of the three-phase short-circuit rotor motor and the maintenance-free, low-noise ball bearings with long-term lubrication contribute to the reliability and longevity of the product.

• Explosion-proof according to ATEX guidelines
• High air flow rate of 1070 m³/h
• Maintenance-free motor with long-term lubrication
• Vibration-free operation through dynamic balancing
• Suitable for temperatures from -20 °C to +40 °C.