A universal high-speed rotary union including an input manifold having passageways, an input distributor fixedly coupled to the input manifold and having passageways fluidly connected with the passageways of the input manifold, a valve plate fixedly coupled to the input distributor and having passageways aligned with the passageways of the input distributor, an output manifold rotatably coupled to the input manifold by a first bearing and having passageways and an internal housing; an output receiver slidably coupled to and disposed within the internal housing of the output manifold, and having passageways aligned with the passageways of the output manifold, a bore defined along a common axis of the input manifold, the input distributor, the valve plate, the output manifold, and the output receiver, and a shaft rotatably coupled within the bore by at least a second bearing. The valve plate and the output receiver have a metal to metal interface.

The present invention concerns a rotatable coupling (60) for connecting pipes, comprising a first hollow female element (61) suited to be connected, for example, to a first pipe portion (51), and a second tubular male element (6) with a first end portion at least partially housed inside the first female element (61) so as to define an inner space for the passage of a fluid, and with a second end portion suited to be connected to a second pipe portion (52). Said first and said second element (61, 6) can be rotated with respect to each other, said second tubular male element (6) comprising a first abutment surface (6S). Furthermore, the rotatable coupling (60) comprises a third hollow tubular element (12) housed inside the first female element and provided with a second abutment surface (1S) substantially opposite the first abutment surface (6S) so as to define a first interspace (I), and the third tubular hollow element (12) can be translated along a direction substantially orthogonal to the first and the second abutment surface (6S, 1S) between a closed configuration, in which the first and the second abutment surface (6S, 1S) are positioned at a minimal mutual distance, and an open configuration, in which the first and the second abutment surface (6S, 1S) are positioned at a distance that exceeds said minimal mutual distance.