Modular centrifugal separator system and exchangeable separation insert

A modular centrifugal separator system configured for separating a liquid feed mixture into a heavy phase and a light phase, the modular centrifugal separator system comprising a base unit and an exchangeable separation insert,

• wherein the base unit comprises a stationary frame and a drive arrangement for rotating at least a portion of the exchangeable separation insert about a rotational axis extending in an axial direction,
• wherein the exchangeable separation insert comprises:
• a rotor casing configured to rotate about the rotational axis and forming a separation space;
• and
• a first stationary portion arranged at a first axial end portion of the rotor casing and comprising at least one fluid connection for one of the liquid feed mixture, the heavy phase, and the light phase,
• wherein the drive arrangement comprises an entrainment member through which a portion of the exchangeable separation insert comprising the first stationary portion extends,
• wherein the entrainment member is journalled in the stationary frame and engages with the rotor casing,
• wherein the entrainment member has an axial extension <40% of a total axial extension of the rotor casing, and
• wherein the rotor casing is supported in the entrainment member over a distance <10% of the total axial extension of the rotor casing.