To improve the measurement accuracy of a particle size distribution measuring device that performs a particle size distribution measurement in a line start mode. A measurement cell used in a line start mode of a centrifugal sedimentation type particle size distribution measuring device includes: a cell main body that has an opening provided on one end and stores therein a density gradient liquid W.sub.DGS; and a cell cap that closes the opening of the cell main body and has an internal passage R provided therein for holding a sample liquid W.sub.SS. When an application of a centrifugal force is received, the sample liquid W.sub.SS is introduced from the internal passage R into the density gradient liquid W.sub.DGS.

A centrifugal separator for separation of a liquid mixture includes a stationary frame, a rotatable assembly and a drive unit for rotating the rotatable assembly relative the frame around an axis of rotation, wherein the rotatable assembly includes a rotor casing enclosing a separation space in which a stack of separation discs is arranged to rotate around a vertical axis of rotation. The rotor casing includes a mechanically hermetically sealed inlet for supply of the liquid mixture to the separation space; a first liquid outlet that is mechanically hermetically sealed and arranged for discharge of a separated liquid phase and a second liquid outlet that is mechanically hermetically sealed and arranged for discharge of a separated heavy phase, the heavy phase having a density that is higher than said liquid phase. The separator further includes at least one positive displacement pump arranged downstream of the second liquid outlet for transporting the separated heavy phase from the separation space and at least one positive displacement pump arranged downstream of the first liquid outlet for transporting the separated liquid phase from the separation space.

A centrifugal separator for separation of a liquid mixture includes a stationary frame, a rotatable assembly and a drive unit for rotating the rotatable assembly relative the frame around an axis of rotation, wherein the rotatable assembly includes a rotor casing enclosing a separation space in which a stack of separation discs is arranged to rotate around a vertical axis of rotation. The rotor casing includes a mechanically hermetically sealed inlet for supply of the liquid mixture to the separation space; a first liquid outlet that is mechanically hermetically sealed and arranged for discharge of a separated liquid phase and a second liquid outlet that is mechanically hermetically sealed and arranged for discharge of a separated heavy phase, the heavy phase having a density that is higher than said liquid phase. The separator further includes at least one positive displacement pump arranged downstream of the second liquid outlet for transporting the separated heavy phase from the separation space and at least one positive displacement pump arranged downstream of the first liquid outlet for transporting the separated liquid phase from the separation space.

A bearing member for supporting a rotatable axle includes a bearing housing; at least one bearing inserted into the bearing housing, wherein the bearing is configured to receive a rotatable shaft extending through the bearing; and a tilting member arranged around the bearing housing. The tilting member includes a pack of annular discs forming a through hole for receiving the bearing housing, wherein each of the annular discs includes a plurality of apertures extending through each of the discs and wherein the tilting member further includes a sleeve element provided in each of the apertures for holding the annular discs together as a stack and for receiving a fastener for attaching the tilting member to the bearing housing or said stationary machine element. The bearing member further includes at least one fastening element extending through a sleeve of the tilting member and attaching the tilting member to the bearing housing.

A bearing member for supporting a rotatable axle includes a bearing housing; at least one bearing inserted into the bearing housing, wherein the bearing is configured to receive a rotatable shaft extending through the bearing; and a tilting member arranged around the bearing housing. The tilting member includes a pack of annular discs forming a through hole for receiving the bearing housing, wherein each of the annular discs includes a plurality of apertures extending through each of the discs and wherein the tilting member further includes a sleeve element provided in each of the apertures for holding the annular discs together as a stack and for receiving a fastener for attaching the tilting member to the bearing housing or said stationary machine element. The bearing member further includes at least one fastening element extending through a sleeve of the tilting member and attaching the tilting member to the bearing housing.

The invention relates to a disc package for a centrifugal separator and a centrifugal separator provided with a disc package comprising a first set of separation discs and a second set of separation discs. Each separation disc of the first and second sets are provided with a separation surface with is inclined with respect to the radial direction. The separation discs of the first and second sets are arranged coaxially around an axis of rotation at a distance from each other such that to form passages between each two adjacent separation discs. The separation discs of the first set have outer diameters A or below, and the separation discs of the second set have outer diameters B or above, wherein diameter B is larger than diameter A. At least two separation discs of the first set is arranged between every two separation disc of the second set.

The invention relates to a disc package for a centrifugal separator and a centrifugal separator provided with a disc package comprising a first set of separation discs and a second set of separation discs. Each separation disc of the first and second sets are provided with a separation surface with is inclined with respect to the radial direction. The separation discs of the first and second sets are arranged coaxially around an axis of rotation at a distance from each other such that to form passages between each two adjacent separation discs. The separation discs of the first set have outer diameters A or below, and the separation discs of the second set have outer diameters B or above, wherein diameter B is larger than diameter A. At least two separation discs of the first set is arranged between every two separation disc of the second set.

A separator for centrifugally processing a flowable product includes a rotatable drum bounding a centrifuging chamber. The drum has a feeding and removal system having at least one feeding device and one or more removal devices composed of plastic or a plastic composite. An inner drum, composed of plastic or a plastic composite, is arranged in an outer supporting device of the drum. The feeding device and the one or more removal devices extend into the inner drum, do not rotate with the inner drum during operation, and are glued and/or welded to each other in such a way that the feeding device and the one or more removal devices are sealingly connected. The feeding and removal system has one or more grippers as the removal device, each of which one or two or more grippers has a disk segment and a shaft segment.

A separator for centrifugally processing a flowable product includes a rotatable drum bounding a centrifuging chamber. The drum has a feeding and removal system having at least one feeding device and one or more removal devices composed of plastic or a plastic composite. An inner drum, composed of plastic or a plastic composite, is arranged in an outer supporting device of the drum. The feeding device and the one or more removal devices extend into the inner drum, do not rotate with the inner drum during operation, and are glued and/or welded to each other in such a way that the feeding device and the one or more removal devices are sealingly connected. The feeding and removal system has one or more grippers as the removal device, each of which one or two or more grippers has a disk segment and a shaft segment.

Method for purifying crude tall oil soap from black liquor, wherein a washing liquid is used, which washing liquid is either pH-regulated residual liquid from a tall oil producing processing step (180) or a pH-regulated aqueous solution of ash, wherein black liquor-containing crude tall oil soap is mixed with said washing liquid, and wherein the crude tall oil soap is then separated out from the resulting mixture. The method comprises the steps 1. performing a first coarse separation (120,130) of crude tall oil soap from said black liquor, so that a first crude tall oil soap fraction is formed; 2. mixing (140) the first crude tall oil soap fraction with washing liquid, so that a first diluted fraction is formed; and 3. performing a separation (150) of the first diluted fraction using a first centrifugal separator of purificator type, so that a second crude tall oil soap fraction is achieved. The second crude tall oil soap fraction comprises smaller contents of black liquor than the first crude tall oil soap fraction. The invention also relates to a system.