Aluminium locking plug with chain DN40

The symmetrical coupling, commonly known as a " fireman's coupling ", is a mechanical device for connecting two pipes. This system is used for transferring liquids or powders in the chemical, petrochemical, food, irrigation and fire-fighting industries. The two pipes to be connected are each fitted with a half-coupling.
A half-coupling consists of a body with a groove at the front containing the seal, two half-shells or jaws, a freely rotating locking ring with locking ramps, and a snap ring to hold the locking ring in position.

Complies with French standard NF E 29-572

Body : Aluminium
Standard seal: NBR Black (on request: EPDM, FPM (VITON type), white PTFE (TEFLON type))
Locking ring retaining ring : galvanised steel