Separator insert for a separator designed for separating a flowable suspension in a centrifugal field into at least two flowable phases (LP, HP) of different density, comprising: a) a housing which is stationary in operation and is designed in the manner of a container which is closed except for a plurality of openings, wherein these openings are designed at least as follows: as a supply opening for an inflowing suspension, formed on a first axial boundary wall of the housing, and as two openings for the discharge (10, 34) of respective flowable phases of different density (LP, HP) on an outer casing of the housing and a second axial boundary wall of the housing, or as two openings for the discharge (24, 34) of respective flowable phases of different density (LP, HP) on the first and the second axial boundary wall (6, 7) of the housing, b) a rotor which is arranged within the housing and is rotatable about an axis of rotation and having a drum which has openings, c) wherein a feed pipe, which does not rotate during operation, extends into one of the openings of the drum at a first of its two axial ends for feeding the suspension to be processed into the drum, which pipe does not touch the drum, and wherein at least one outlet for a first of the flowable phases from the drum is formed as a peeling disk which does not rotate during operation and which has a discharge pipe which is guided out of the drum at the opposite second axial end of the drum, d) a separating means arranged on the drum, e) at least two rotor units (4b, 5b) for magnetic bearing devices (4, 5) at two axially spaced locations of the rotor with the drum, by means of which the rotor with the drum can be held in a suspended state, can be rotatably mounted and can be made to rotate within the housing during operation. a) a housing which is stationary in operation and is designed in the manner of a container which is closed except for a plurality of openings, wherein these openings are designed at least as follows: as a supply opening for an inflowing suspension, formed on a first axial boundary wall of the housing, and as two openings for the discharge (10, 34) of respective flowable phases of different density (LP, HP) on an outer casing of the housing and a second axial boundary wall of the housing, or as two openings for the discharge (24, 34) of respective flowable phases of different density (LP, HP) on the first and the second axial boundary wall (6, 7) of the housing, b) a rotor which is arranged within the housing and is rotatable about an axis of rotation and having a drum which has openings, c) wherein a feed pipe, which does not rotate during operation, extends into one of the openings of the drum at a first of its two axial ends for feeding the suspension to be processed into the drum, which pipe does not touch the drum, and wherein at least one outlet for a first of the flowable phases from the drum is formed as a peeling disk which does not rotate during operation and which has a discharge pipe which is guided out of the drum at the opposite second axial end of the drum, d) a separating means arranged on the drum, e) at least two rotor units (4b, 5b) for magnetic bearing devices (4, 5) at two axially spaced locations of the rotor with the drum, by means of which the rotor with the drum can be held in a suspended state, can be rotatably mounted and can be made to rotate within the housing during operation.