Separator

The invention relates to a self-evacuating separator for centrifugally separating a suspension S into at least one light liquid phase LP, a heavy solid phase SP and an intermediate heavy intermediate phase IP, having at least the following features: a) a centrifugal drum (1) which can be rotated about an axis of rotation D and into which the suspension S to be treated can be introduced; b) at least one liquid discharge (9) for the light liquid phase; c) at least one or more solid discharge openings (13) for the heavy solid phase SP, which solid discharge openings are associated with at least one actuatable first discharge device (15), by means of which the at least one or more solid discharge openings (13) can be opened discontinuously and can be closed again; and d) at least one or more discontinuously acting outlet openings (25) for the intermediate phase IP, which outlet openings are associated with at least one actuatable second outlet device (26), by means of which the at least one or more outlet opening