METU-FORM Ducts, Fittings and Connections

METU-FORM Ductsystem

When conventional air-ducts reach their limits!

Air tightness class ATC1
Oil tightness!

Low friction and reduced pressure losses
Dirt-repellent and easy-to-clean inner surfaces

Easily to install
Easy installation with just one Allen screw per connection

METU-FORM is an optimized duct system that meets the growing demands of our industry as well as today's environmental protection requirements.

  1. Laser-welded ducts, welded fittings
  2. Formed-on "Parallel" flange (patented) with SRX joining clips
  3. Exceeds the air-tightness class D according to DIN EN 12237, class ATC 1 (DIN EN 16798-3)
  4. Liquid and oil tight ducts, fittings and connections
  5. Smooth, dirt-retardant and easy to clean inner surfaces
  6. Parts made from thin sheet metal, easy to transport
  7. Easy installation: Allen keys are the only tools you need.
  8. The parts have a discrete appearance
  9. Available in galvanized steel from 80 to 1000 mm Ø
  10. Available in stainless steel V2A  (1.4301 / ASTM 304) from 200 to 1000 mm Ø
  11. No ATEX / Ex certifications
  12. Many applications


SRX Joining Clips
For the assembly of ducts and fittings 
with formed-on "Parallel" flanges.


Overcollars MUX
For the assembly of "plain" ducts and fittings.
The MUX overcollars will be in time replaced by the MUX-S below.


Ducts with formed-on "Parallel" Flange


Plain Ducts (without turned-out edges or flanges)




Telescopic Fittings

End Caps






Cross Pieces




Saddle Pieces




Swan-neck Bends






Damper Actuators


Transitions from Round to Rectangular




Loose Flange Adapters


Flexible Hoses


Male Hose Couplings


Male Couplings with
Return-flow Protection

Female Hose Couplings


Air Outlets


Rain Caps


Ventilation Hoods

Inspection Pipes


Primary Oil Separator


Customized Parts


Technical Information

Usual diameters and round duct
connections according to the diameters
DIN EN 1506

Oil Tightness Tests

METU-FORM and the Norms


Properties of an ideal air-duct

Are round ducts better?

Suitability Checklist

Applications and References

Oil-tight Ducts as Standard

METU-FORM Information Leaflet
(only available in German)

Made by METU in Germany