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Couplings

Photo of product family: Couplings

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.

Couplings - Products range
Miniature picture Product code Name of product Files to download
Photo of product Male couplings with gaskets NSL

Male couplings with gaskets

NSL male couplings allow connecting SPIRAL round ducts or round plain ducts with inner joints. The piece is installed by pressing both ends into the ducts to be joined, up to the stop in the middle of the male coupling. Next, the male coupling needs to be fastened to both ducts with self-drilling screws or rivets. As a result of the double EPDM rubber gasket, the product meets requirements for air tightness class D according to EN 12237.

Male couplings with gaskets
Photo of product Male couplings for round spiral ducts NS

Male couplings for round spiral ducts

NS male couplings allow connecting round SPIRAL ducts or round plain ducts with inner joints. The piece is installed by pressing both ends into the ducts to be joined, up to the stop in the middle of the male coupling. Next, the male coupling needs to be fastened to both ducts with self-drilling screws or rivets. The air tightness level can be increased to class B by wrapping the joints with the TAL, TALK, MET, DUCT or TAPV sealing tape.

Male couplings for round spiral ducts
Photo of product Female couplings for duct fittings MSF

Female couplings for duct fittings

MSF female couplings can be used for connecting round fittings. The Installation method is identical for both gasketfitted or bare ends. The female end is pressed over the end of a bend, T-piece, damper or reducer and fastened with selfdrilling screws or rivets. Joints provided with gasket fittings require no additional sealing. If no gaskets are provided, it is best to seal the joint with a sealing tape.

Female couplings for duct fittings
Photo of product Male - Female couplings with gasket for duct fittings SMSFL

Male - Female couplings with gasket for duct fittings

SMSFL units are long male-to-female couplings for connecting ventilation fittings. They can be used for connecting fittings to spiral ducts without a press-in stop. If there is no press-in stop in the ducts, the end's insertion length can be freely adjusted. It is a popular solution for ventilation ducts continuously exposed to temperature variations which affect thermal expansion and shrinking of the ductwork. The fitting is also perfect for connecting fire dampers to the ductwork.

Male - Female couplings with gasket for duct fittings
Photo of product Male couplings with gasket  for round ducts SNSL

Male couplings with gasket for round ducts

SNSL male couplings with EPDM gaskets enable making flexible connections. They can be used as expansion joints in ductwork or for connecting ducts at floor penetrations. SNSL male couplings can also be installed for splicing replaced ducts in legacy systems. It is a popular solution for ventilation ducts continuously exposed to temperature variations which affect thermal expansion and shrinking of the ductwork. The fitting is also perfect for connecting fire dampers to the ductwork.

Male couplings with gasket for round ducts
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