A connector for transferring at least one fluid or for applying a pneumatic pressure from an inlet conduit to an outlet conduit that may rotate with respect to the inlet conduit, in which the connector comprises: - a rotating shaft defining the outlet conduit therein, which has an inlet opening, said rotating shaft defining a rotational axis (S-S) and comprising a sealing disc extending radially from said rotating shaft; - an insertion chamber to which said inlet conduit is sealingly securable, said insertion chamber leading to said inlet opening of the outlet conduit; - at least one first cylinder-piston assembly comprising a cylinder and a piston slidable into said cylinder, said piston having a sealing surface facing the sealing disc, and said cylinder being fluidically connected or connectable to said insertion chamber; said piston being configured to be selectively actuated between: a sealing position wherein the sealing surface is at a minimum distance or in contact with the sealing disc so that a sealed fluid pathway is formed between said insertion chamber and said inlet opening of the outlet conduit, in order for the fluid to be prevented to pass through the space between the piston sealing surface and the sealing disc, and in order for the fluid to be forced to pass from the insertion chamber to the outlet conduit, therefore from the inlet conduit to the outlet conduit, and a non-sealing position wherein the sealing surface is moved away from the sealing disc so that a non-sealed fluid pathway is formed between said insertion chamber and said inlet opening of the outlet conduit, the fluid being free to pass through the space between the piston sealing surface and the sealing disc instead of being forced to pass from the insertion chamber to the inlet opening of the outlet conduit, therefore between the inlet conduit and the outlet conduit. - a rotating shaft defining the outlet conduit therein, which has an inlet opening, said rotating shaft defining a rotational axis (S-S) and comprising a sealing disc extending radially from said rotating shaft; - an insertion chamber to which said inlet conduit is sealingly securable, said insertion chamber leading to said inlet opening of the outlet conduit; - at least one first cylinder-piston assembly comprising a cylinder and a piston slidable into said cylinder, said piston having a sealing surface facing the sealing disc, and said cylinder being fluidically connected or connectable to said insertion chamber; a sealing position wherein the sealing surface is at a minimum distance or in contact with the sealing disc so that a sealed fluid pathway is formed between said insertion chamber and said inlet opening of the outlet conduit, in order for the fluid to be prevented to pass through the space between the piston sealing surface and the sealing disc, and in order for the fluid to be forced to pass from the insertion chamber to the outlet conduit, therefore from the inlet conduit to the outlet conduit, and a non-sealing position wherein the sealing surface is moved away from the sealing disc so that a non-sealed fluid pathway is formed between said insertion chamber and said inlet opening of the outlet conduit, the fluid being free to pass through the space between the piston sealing surface and the sealing disc instead of being forced to pass from the insertion chamber to the inlet opening of the outlet conduit, therefore between the inlet conduit and the outlet conduit.