Overcollars MU

For inner-duct diameters from 71 up to 315 mm.
CAUTION: Diameters above 315 mm only suitable for very sturdy ducts. Tightness and stability cannot be guaranteed.

Suitable duct types: spirally wound ducts, longitudinal seam ducts and fittings.

Not suitable for ducts and fittings with turned-out edges and ducts with stiffening ribs.

The unique Allen screw (M6) to be tightened shortens the assembly times drastically. Easy disassembly (unlike the plug-in system).

Diameter differences of up to 4 mm are bridged.

Air-tightness class D (DIN EN 12237) or ATC 2 (DIN EN 16798-3) when installed correctly.

Hardly any protrusions inside the duct (ideal for the extraction of chips, fibers, etc.).

No additional measures, such as the use of adhesive tape or sealant, are necessary.

Equipotential bonding by correct installation (must always to be verified).

MU with PE gasket: up to approx. + 100°C
MU with KF gasket: up to approx. + 200°C

On a 100 mm Ø plain duct the necessary force to pull the connection apart is ≈ 1100 N (humidity and dirt can negatively affect these values). When installed vertically, each duct segment must be individually fixed and secured.