Abstract: A centrifugal separator for separating at least one liquid phase and a solids phase from a liquid feed mixture includes a frame, a drive member and a rotating part. The drive member is configured to rotate the rotating part in relation to the frame around an axis of rotation. The rotating part includes a centrifuge bowl enclosing a separation space and a sludge space. The separation space includes a stack of separation discs arranged coaxially around the axis of rotation and the sludge space is arranged radially outside said stack of separation discs. The centrifuge bowl includes an inlet for receiving the liquid feed mixture, at least one liquid outlet for a separated liquid phase, and at least one sludge outlet for a separated solids phase. The upper inner surface of the sludge space forms an upper sludge space angle ? relative the axis of rotation as seen in an axial plane.

Abstract: A separation disc for a centrifugal separator is adapted to be included in a stack of separation discs inside a centrifugal rotor for separating a fluid mixture. The separation disc has a truncated conical shape with an inner surface and an outer surface and a plurality of spacing members extending from at least one of the inner surface and the outer surface. The spot-formed spacing members are for providing interspaces between mutually adjacent separation discs in a stack of separation discs. The separation disc further includes at least one elongated rib extending from the inner surface to a height (h) that is less than the height (H) to which said plurality of spacing members extend.

Abstract: A seal assembly for providing a seal between a first zone and a second zone includes a rotatable sealing member including a first sealing ring, a stationary sealing member including a second sealing ring and a device for bringing the first and second sealing rings into engagement with each other. The first and second sealing rings are arranged so that a double contact seal having at least one chamber arranged at a radial plane is formed upon engagement between the first and second sealing rings. The seal assembly further includes at least one fluid connection to the chamber. A centrifugal separator includes such a seal assembly.

Abstract: A centrifugal separator for separation of at least two components of a fluid mixture which are of different densities includes a frame, a hollow spindle rotatably supported by the frame, a centrifuge rotor mounted to a first end of the hollow spindle to rotate together with the spindle around an axis of rotation, wherein the centrifuge rotor includes a rotor casing enclosing a separation space in which a stack of separation discs is arranged, a duct arranged to be through-flown by process medium during operation of the centrifugal separator and extending through the hollow spindle and in fluid contact with said separation space, at least one liquid outlet for discharging a separated liquid phase from the separation space, and a plurality of peripheral ports extending from the separation space through the rotor casing to a surrounding space for discharging a phase from the periphery of the separation space.