A self-emptying separator includes a rotatable drum with an inlet, a liquid outlet, outlet openings for solid material, and a control system. A flowable starting product is cleared of the solids in continuous operation in a centrifugal field in the rotating drum. A continuous discharge of a clear phase is performed. A solid phase is discharged via the outlet openings from a solids collecting space of the drum into an annular solids catcher. The solids catcher has a device for generating a fluid curtain against which the solids, issuing from the outlet openings for solid material, impact.

An outlet nozzle (40) for a centrifuge bowl (60) comprises a nozzle insert (10) and a nozzle holder (30). The nozzle insert (10) can be exchangeably fixed, in particular clamped, in the nozzle holder (30), and the outlet nozzle (40) has a flow channel (11) which determines the exit angle (δ) of the outlet nozzle (40), said flow channel (11) of the outlet nozzle (40) being formed, in particular, by the nozzle insert (10).

An outlet nozzle (40) for a centrifuge bowl (60) comprises a nozzle insert (10) and a nozzle holder (30). The nozzle insert (10) can be exchangeably fixed, in particular clamped, in the nozzle holder (30), and the outlet nozzle (40) has a flow channel (11) which determines the exit angle (δ) of the outlet nozzle (40), said flow channel (11) of the outlet nozzle (40) being formed, in particular, by the nozzle insert (10).

A method of supervising and controlling an E-line position in a centrifugal separator and a centrifugal separator include the E-line positon being continuously calculated based on inter alia, monitored density of light and heavy liquid phases, and monitored pressure at outlet side of light and/or heavy liquid outlet passages. First and/or second valves are controlled to control the E-line position, based on the supervised E-line position.

A method of supervising and controlling an E-line position in a centrifugal separator and a centrifugal separator include the E-line positon being continuously calculated based on inter alia, monitored density of light and heavy liquid phases, and monitored pressure at outlet side of light and/or heavy liquid outlet passages. First and/or second valves are controlled to control the E-line position, based on the supervised E-line position.

An outlet nozzle for centrifugal drums has a nozzle body with at least one cylindrical portion and having an insert connected to the nozzle body. An inlet channel and an outlet channel, which is oriented at an angle with respect to the inlet channel, are formed in the nozzle body. The insert has a torque transmitting contour for arranging a tool with a complementary tool torque transmitting contour in position in order to rotatingly secure the nozzle body in an opening of a rotatable centrifugal drum and to release said nozzle body. The insert also has a polygonal cross-section, which is smaller than the cross-section of the cylindrical section. The insert starting from the polygonal, in particular, rectangular cross-section, merges with the cylindrical section of the nozzle body over rounded surfaces having a radius greater than 1.0 mm.

An outlet nozzle for centrifugal drums has a nozzle body with at least one cylindrical portion and having an insert connected to the nozzle body. An inlet channel and an outlet channel, which is oriented at an angle with respect to the inlet channel, are formed in the nozzle body. The insert has a torque transmitting contour for arranging a tool with a complementary tool torque transmitting contour in position in order to rotatingly secure the nozzle body in an opening of a rotatable centrifugal drum and to release said nozzle body. The insert also has a polygonal cross-section, which is smaller than the cross-section of the cylindrical section. The insert starting from the polygonal, in particular, rectangular cross-section, merges with the cylindrical section of the nozzle body over rounded surfaces having a radius greater than 1.0 mm.

A separator includes a drum ejection passage control element and an intermediate ejection control element both mounted on a drum assembly. The drum ejection passage control element is moveable between a first position and a second position. In the second position a drum ejection passage is open for ejection of material from a maximum diameter of a separator volume, while in the first position the drum ejection passage control element blocks the drum ejection passage to prevent the ejection of material from the maximum diameter of the separator volume. An intermediate ejection path is formed in the separator, each extending from an intermediate ejection path inlet at an intermediate region of the separator volume to an intermediate ejection path outlet. The intermediate ejection control element is moveable to alternately open or close the intermediate ejection path for fluid communication to the separator volume.

An outlet nozzle for centrifugal drums has a nozzle body with at least one cylindrical portion and having an insert connected to the nozzle body. An inlet channel and an outlet channel, which is oriented at an angle with respect to the inlet channel, are formed in the nozzle body. The insert has a torque transmitting contour for arranging a tool with a complementary tool torque transmitting contour in position in order to rotatingly secure the nozzle body in an opening of a rotatable centrifugal drum and to release said nozzle body. The insert also has a polygonal cross-section, which is smaller than the cross-section of the cylindrical section. The insert starting from the polygonal, in particular, rectangular cross-section, merges with the cylindrical section of the nozzle body over rounded surfaces having a radius greater than 1.0 mm.

An outlet nozzle for centrifugal drums has a nozzle body with at least one cylindrical portion and having an insert connected to the nozzle body. An inlet channel and an outlet channel, which is oriented at an angle with respect to the inlet channel, are formed in the nozzle body. The insert has a torque transmitting contour for arranging a tool with a complementary tool torque transmitting contour in position in order to rotatingly secure the nozzle body in an opening of a rotatable centrifugal drum and to release said nozzle body. The insert also has a polygonal cross-section, which is smaller than the cross-section of the cylindrical section. The insert starting from the polygonal, in particular, rectangular cross-section, merges with the cylindrical section of the nozzle body over rounded surfaces having a radius greater than 1.0 mm.