Abstract: The invention relates to a gas-lubricated mechanical seal arrangement (1) comprising a first mechanical seal (2) having a first rotating slide ring (21) and a first slide ring (22) defining a first sealing gap (23) between sealing surfaces (21a, 22a), the first slide ring (22) having a passageway (25) for supplying a barrier fluid to the first sealing gap (23), wherein the passageway (25) extends from a rear surface (22b) to the sliding surface (22a) of the first stationary slide ring (22), and wherein on the first rotating slide ring (21) a first secondary seal (4) for sealing and a centering device (5) for centering of the first rotating slide ring (21) are arranged.

Abstract: The invention relates to a gas-lubricated mechanical seal arrangement using a gaseous fluid as a barrier medium, comprising a mechanical seal comprising a rotating slide ring (2) and a stationary slide ring (3) defining a seal gap (4) therebetween, a biasing means (5) biasing the stationary slide ring (3) towards the rotating slide ring (2), a fluid space (6), into which the gaseous fluid can be introduced, a first slide ring carrier (20) for retaining the rotating slide ring (2), the first slide ring carrier (20) having a first axial surface (21), a second slide ring carrier (30) for retaining the stationary slide ring (3), the second slide ring carrier (30) having a second axial surface (31), the second slide ring (30) and the stationary slide ring (3) being arranged together on a displacement surface (32) so as to be displaceable in the axial direction (X-X), an axial gap (7), which is limited by the first axial surface (21) and the second axial surface (31), and an antechamber (8) which is formed at the s

Abstract: The invention relates to a gas-lubricated mechanical seal arrangement (1) comprising a first mechanical seal (2) having a first rotating slide ring (21) and a first slide ring (22) defining a first sealing gap (23) between sealing surfaces (21a, 22a), the first slide ring (22) having a passageway (25) for supplying a barrier fluid to the first sealing gap (23), wherein the passageway (25) extends from a rear surface (22b) to the sliding surface (22a) of the first stationary slide ring (22), and wherein on the first rotating slide ring (21) a first secondary seal (4) for sealing and a centering device (5) for centering of the first rotating slide ring (21) are arranged.

Abstract: The invention relates to a gas-lubricated mechanical seal arrangement using a gaseous fluid as a barrier medium, comprising a mechanical seal comprising a rotating slide ring (2) and a stationary slide ring (3) defining a seal gap (4) therebetween, a biasing means (5) biasing the stationary slide ring (3) towards the rotating slide ring (2), a fluid space (6), into which the gaseous fluid can be introduced, a first slide ring carrier (20) for retaining the rotating slide ring (2), the first slide ring carrier (20) having a first axial surface (21), a second slide ring carrier (30) for retaining the stationary slide ring (3), the second slide ring carrier (30) having a second axial surface (31), the second slide ring (30) and the stationary slide ring (3) being arranged together on a displacement surface (32) so as to be displaceable in the axial direction (X-X), an axial gap (7), which is limited by the first axial surface (21) and the second axial surface (31), and an antechamber (8) which is formed at the s

Abstract: The invention provides highly concentrated aqueous solutions of a first amphoteric surfactant, especially of betaines or amine oxides, which comprise one or more further amphoteric cosurfactants which have a different structure from the first amphoteric surfactant, in amounts by weight of from 0.01 % to 10%, preferably from 0.1% to 5%, more preferably from 0.5% to 3%, based on the highly concentrated aqueous solution.