Round Duct Connections

METU-SYSTEM Round Duct Connections

A Convenient Assembly and Time Savings on Site

A quick and uncomplicated installation of circular ventilation ducts on site, whatever the diameters between 80 and 1600 mm, is an undeniable economic and practical advantage.

Air-tightness class C (DIN EN 12237) and class ATC3 (DIN EN 16798-3).

Except if indicated otherwise, the diameters always correspond to the inner duct-Ø.

What differentiates the AF, LF, BF and UF flanges is the way they are fixed into the circular ducts. They can still be combined with each other (connecting an AF flange with an LF flange for example) as they have all been designed to be assembled together with SR joining clips.


You do not know which connection to choose? 

In most cases your first choices would be the MU Overcollars (Ø 80 to 315 mm) and
the AF Circular Flanges (Ø 200 to 3000 mm).

Round Flanges AF
Most popular METU flange for round ducts
This flange is your first choice for the diameters from 200 to 3000 mm
Air-tightness class C (DIN EN 12237), ATC3 (DIN EN 16798-3)
Assembly with SR Joininig Cips

 

Round Flanges LF
For the connection of ducts with tured-out edges (Vanstone)
For duct-Ø from 200 to 3000 mm
Air-tightness class C (DIN EN 12237), ATC3 (DIN EN 16798-3)
Assembly with SR Joininig Cips

 

Round Flanges BF
These flanges enter deeper into the ducts, translating into more flexibility.
For duct-Ø from 200 to 3000 mm
Air-tightness class C (DIN EN 12237), ATC3 (DIN EN 16798-3)
Assembly with SR Joininig Cips

Round Flanges UF
This UF flange requires more work than the others including the application of a sealant.
For duct-Ø from 200 to 3000 mm
Air-tightness class C (DIN EN 12237), ATC3 (DIN EN 16798-3)
Assembly with SR Joininig Cips

Joining Clips SR
Allow to assemble the AF, UF, LF and BF flanges together.
Must be ordered with gasket in order to achieve the air-tightness class C / ATC3

 

Overcollars MU
Economical connections
Duct-Ø from 71 to 315 mm
Air-tightness D (DIN EN 12237) or ATC2 (DIN EN 16798-3)

Round Pressed Flanges PF
For duct diameters from 80 to 200 mm
Air-tightness class C (DIN EN 12237) or ATC 3 (DIN EN 16798-3)
Assembly with SS joining clips

Joining Clips SS
For the assembly of ducts fitted with PF flanges.
Must be ordered with gasket in order to achieve the air-tightness class C / ATC3

 

Circular Connections Overview

Round or Rectangular?
Here are some thoughts on the subject.