Abstract: Sealing ring (1) for a centrifugal separator with an axially open annular groove (7) for the sealing ring in a first rotor part (2) and a relative to the first rotor part (2) axially movable second rotor part (3), against which the sealing ring (1) sealingly abuts. Both the sealing ring (1) and the groove (7) have a first annular portion (8 and 9, respectively) turned towards the second rotor part (3) and a second annular portion (14 and 11, respectively) turned away from the second rotor part (3). The second portion (11) of the groove has an outer annular recess (12) and an inner annular recess (16) whereas the second annular portion (14) of the sealing ring (1) has at least one projection (15), which is arranged to at least partly fill up the outer recess of the groove (7).

Abstract: A locking ring for joining a first and second of a rotor in a centrifugal separator, the first rotor part having a cylindrical end portion, and the second part having an annular flange. A locking ring is arranged to be positioned into a recess and via two radially outer contact surfaces to abut against the end portion and via inner contact surfaces to abut against the flange. The locking ring extends substantially a complete revolution around the rotational axis with two end surfaces turned towards one another and being so formed out of a single piece of resilient material that in an unloaded condition is substantially annular with an outer diameter, is at least as large as the outer radius of the recess, the contact surfaces being are so located that they in every axial section around the rotational axis have a middle point, in which the contact surface have a direction of normalcy, which is the for all contact surfaces.