Application purpose:
- For fire protection of ventilation ducts
Characteristics:
- fire resistance not less than EI 180;
- when the temperature rises to +150 °C, the fire-retardant material of the fire-fighting sleeve expands tenfold.

Compound:
- metal case (painted with polymer powder paint);
- an insert in the form of a tape made of a special thermally expanding material "OGNEZA-TRM";
- lamellas;
- sealant made of thermally expanding material;
- fastening eyelets.
Mounting scheme:

Installation Recommendations:
- installation is carried out at temperatures from -50 °С to +60 °С;
- the installation site is pre-cleaned;
- the attachment points should not have cracks, and the thickness of the hard layer should allow the installation of a fixing metal dowel;
- mounted in channels with an internal diameter of 125 mm to 240 mm;
- the gap between the channel wall and the coupling should not be more than 5 mm;
- the coupling is installed in the channel, after which the points of attachment of the lugs to the enclosing structure are marked with a marker;
- holes are drilled and dowels are installed (must be metal!);
- the coupling is fixed with self-tapping screws.
Diameter: DN 160.