https://www.belimo.com/it/it_IT/products/actuators/product-documentation/damper-actuators-fire-and-smoke
Attuatori per serrande tagliafuoco | Belimo
Specifically designed safety actuators for the motorisation of fire dampers provide best protection against the spread of fire and smoke through the air ducts....
serrande tagliafuocoattuatoriperbelimo
https://schako.com/it/schako-product-category/serrande-tagliafuoco/
Serrande tagliafuoco - SCHAKO Italia
serrande tagliafuocoitalia