We at METU-SYSTEM offer 8 different types of circular duct connections. Each has been designed to fill specific criteria depending on the duct types, fittings, diameters, and other requirements such as pressure, temperature resistance, stability, air-tightness, etc. The most popular are the AF circular flanges, followed by the LF. Several flange types and dimensions cover the diameters without interruptions from 71 mm (2,8 in) up to 3000 mm (118.0 in).

Our most popular circular duct connection.
Manufactured in Germany, Japan and Taiwan.

Wider and more flexible flanges.
Can act as a telescope section.

Connection for ducts and fittings with turned-out edges (Van Stone). No projections inside the duct.

Connections for circular ducts with reinforcing beads or ribs. Also suitable for inaccurate duct-Ø.

Joining clips for the assembly of AF, BF, LF, UF and MF circular flanges. Simple and rapid assembly thanks to the SE nut runner.

Eliminate vibrations and noise transmission
and act as an expansion joint.

Circular flanges for small duct diameters. Simple and fast assembly thanks to the SS joining clips.

Overcollars for the economical connection of small duct diameters.

Allow the measurement of the internal duct circumference easily and accurately.

For the creation of notches for the fastening of the AF and BF circular flanges.