Centrifugal separator

Thus, an exchangeable separation insert for a centrifugal separator comprises a rotor casing enclosing a separation space in which a stack of separation discs is arranged to rotate around an axis of rotation. Said rotor casing is axially arranged between a first and a second stationary portion. The insert comprises further a feed inlet for supply of the fluid mixture to be separated to said separation space, a light phase outlet for discharge of a separated phase of a first density, and a heavy phase outlet for discharge of a separated phase of a second density higher than said first density. Two of said feed inlet, light phase outlet and heavy phase outlet are arranged at a first axial end of said rotor casing. A first seal assembly is sealing and connecting said two of said feed inlet, light phase outlet and heavy phase outlet to corresponding inlet conduit and/or outlet conduits in said first stationary portion. Said first seal assembly comprises a rotatable part attached to said rotor casing and a stationary part attached to said stationary portion. Said rotatable part and said stationary part are axially aligned and seal against each other. A first of said two of said feed inlet, light phase outlet and heavy phase outlet is arranged axially at the axis of rotation and a second of said two of said feed inlet, light phase outlet and heavy phase outlet is arranged axially outside of said first of said two of said feed inlet, light phase outlet and heavy phase outlet in such a manner that both said first and second of said two of said feed inlet, light phase outlet and heavy phase outlet are led through said rotatable part and said corresponding inlet conduit and/or outlet conduits are led through said stationary part of said first seal assembly.