Coupling for cryogenic media

A method for coupling vacuum-insulated pipe or hose lines for conducting one or more cryogenic media, comprising the acts of:

• providing a coupling, the coupling comprising a single- or multi-core cryogenic media coupler plug and a coupler socket arranged to be coupled to the coupler plug, wherein in the coupled state a conduit of the coupler plug is movable in an axial direction relative to the coupler plug to extend into the coupler socket, the coupler plug and coupler socket each have a ball valve provided with a through hole through which the conduit is passable, the coupler plug and coupler socket each have an axially displaceable locking sleeve, each sleeve being coupled to rotate its respective ball valve, and the locking sleeves are arranged to engage one another when the coupler plug and coupler socket are brought together, such that the locking sleeves are axially displaced from closed positions to open positions and the ball valves are rotated between respective closed and open positions;
• coupling the coupling plug to the coupling socket;
• and
• extending the conduit through the coupling plug ball valve and through the coupling socket ball valve.