Insulated Duct Male Coupling for Spiral Ducts

Airtightness and Joint Integrity

The F..-NSL coupling plays a critical role in maintaining the specified airtightness and thermal consistency across the duct run. It is engineered to perform without compromise.

• Airtightness: The integrated, factory-fit EPDM rubber gasket guarantees the highest airtightness class D for the entire duct connection.
• Connection Type: As a male coupling, it securely inserts into the ends of two spiral duct sections.
• Insulation Gap Elimination: A key feature is the strategic width of the rubber foam on the coupling. This overlap is specifically applied to eliminate the exposed, missing part of the insulation at the ends of the spiral ducts (which are often left incomplete due to transport considerations).

Product Configuration and Dimensions

The F..-NSL is available to match all nominal diameters of the FOAM System ducts, along with the full range of insulation thicknesses.

Available Insulation Thicknesses (Q)

• 9 mm
• 13 mm
• 19 mm
• 25 mm

Sheet Material Options

The core metal coupling can be specified in three material types:

• Galvanised (Standard)
• Stainless Steel (K)
• Aluminium (A)