Marine slide ring seal arrangement

a, aa, aThe invention relates to a marine meachanical seal arrangement comprising a first mechanical seal comprising a first rotating slide ring and a second stationary slide ring defining a first sealing gap between their two sliding surfaces, a second meachanical seal comprising a second rotating slide ring and a second stationary slide ring, which define a second sealing gap between their sliding surfaces, a barrier circuit comprising a barrier fluid cavity which is arranged between the first mechanical seal and the second mechanical seal and is filled with a barrier fluid, the barrier fluid cavity being divided into a first sub-cavity and a second sub-cavity, the first subcavity and the second subcavity being separated by a flexible lip seal wherein the second sub-cavity is arranged at the second mechanical seal, and wherein the lip seal is arranged such that a flow of barrier fluid from the first subcavity into the second subcavity is allowed and a flow of barrier fluid from the second subcavity to the first subcavity is prevented. (FIG. )