The Helios FR 280 is a durable flange designed for connecting circular flanged fans to round ducting systems. It aligns precisely with the fan’s diameter and bolt pattern, ensuring a tight fit for flexible connectors or direct duct attachment. Made from galvanized steel for longevity and corrosion resistance, this flange is part of a standard range covering diameters from 180 mm to 710 mm. Ideal for both commercial and industrial ventilation installations requiring reliable airflow transitions.