The Helios FR 630 is a robust flange made for connecting circular flanged fans to circular ducting. Manufactured from durable galvanized steel, it is engineered to match the specific diameter and bolt pattern of Helios flanged fans, ensuring a secure and easy installation. The flange includes a spigot compatible with both flexible connectors and standard circular ducts. Available in a range of ten sizes from 180 mm to 710 mm, the FR 630 is part of a versatile series supporting a wide variety of ventilation applications.