Couplings are produced in diameters range 80 to 1600 mm of galvanized, aluminium and acid-resistant sheet.
They are recommended in the version with EPDM seals to ensure achieving "D" class leaktightness according to Eurovent (SITAC certificate). Depending on a type of connection there are following types of couplings:
Nipple couplings NS/NSL produced with negative tolerance are applicable for connecting two ducts which overlap the connector.
Muff couplings MSF which have diameters equal to duct diameters and are applicable for connecting two ducts which go inside the connector.
They are used to ventilation ducts and fittings.