Multimedia-compatible rotary union

A multimedia-compatible rotary union for transferring different fluid media, having different viscosities, from a stationary machine part to a rotating machine part, comprising:

• a stationary housing part for installation in the stationary machine part, and comprising a working space,
• a rotor for connection to the rotating machine part and having a fluid channel for establishing a fluidic connection to the working space of the stationary housing part,
• a mechanical seal between the stationary housing part and the rotor, wherein the mechanical seal comprises a rotor seal ring that rotates together with the rotor, and a stator seal ring, wherein the stator seal ring or the rotor seal ring is fastened to an axially movable seal ring carrier, and the mechanical seal can open and close by axial movement of the seal ring carrier,
• wherein the stationary housing part comprises at least one first and second media inlet channel for introducing fluid media into the stationary housing part, wherein the first and second media inlet channels open into the working space, and wherein fluid media can be introduced into the rotary union, under pressurization, via the first or the second media inlet channel, and
• wherein the mechanical seal, upon pressurization of the first media inlet channel with a fluid medium has a first balance ratio, and upon pressurization of the second media inlet channel with a fluid medium has a second balance ratio.