Self-draining separator for centrifugally separating a suspension S into at least a light liquid phase LP, a heavy solid phase SP, and a moderately heavy intermediate phase IP, comprising at least the following: a) a centrifuging drum which is rotatable about a rotational axis D, into which the suspension S to be processed can be introduced, b) at least one liquid discharge for the light liquid phase, c) at least one or more discontinuously acting solid matter discharge opening(s) for the heavy solid phase SP, to which at least one first actuatable discharge device is assigned, by means of which the at least one or more solid matter discharge opening(s) can be opened discontinuously and closed again, and d) at least one or more discontinuously acting discharge opening(s) for the intermediate phase IP, to which at least one second actuatable discharge device is assigned, by means of which the at least one or more discharge opening(s) for the intermediate phase IP can be opened discontinuously and closed again, wherein the second discontinuously acting discharge device can be actuated independently of the first discontinuously acting discharge device, so that the discharge of the intermediate phase IP can take place temporally independently of the discharge of the solid phase SP, characterized in that e) nozzle-like tubes are placed in or at the discharge openings for the intermediate phase IP, the length of which tubes is such that they extend radially up to a radius R3 into a layer of the intermediate phase IP forming radially in the centrifuging drum during rotation thereof, so that the discharge of the intermediate phase IP from the centrifuging drum takes place on this radius R3. a) a centrifuging drum which is rotatable about a rotational axis D, into which the suspension S to be processed can be introduced, b) at least one liquid discharge for the light liquid phase, c) at least one or more discontinuously acting solid matter discharge opening(s) for the heavy solid phase SP, to which at least one first actuatable discharge device is assigned, by means of which the at least one or more solid matter discharge opening(s) can be opened discontinuously and closed again, and d) at least one or more discontinuously acting discharge opening(s) for the intermediate phase IP, to which at least one second actuatable discharge device is assigned, by means of which the at least one or more discharge opening(s) for the intermediate phase IP can be opened discontinuously and closed again, wherein the second discontinuously acting discharge device can be actuated independently of the first discontinuously acting discharge device, so that the discharge of the intermediate phase IP can take place temporally independently of the discharge of the solid phase SP, characterized in that wherein the second discontinuously acting discharge device can be actuated independently of the first discontinuously acting discharge device, so that the discharge of the intermediate phase IP can take place temporally independently of the discharge of the solid phase SP, characterized in that e) nozzle-like tubes are placed in or at the discharge openings for the intermediate phase IP, the length of which tubes is such that they extend radially up to a radius R3 into a layer of the intermediate phase IP forming radially in the centrifuging drum during rotation thereof, so that the discharge of the intermediate phase IP from the centrifuging drum takes place on this radius R3.