Herein a centrifugal separator is disclosed. The centrifugal separator includes a housing, a spindle, and a rotor. The spindle is only journalled in a bearing arrangement fixedly positioned in the housing at the first axial end portion. The centrifugal separator includes a seal arranged between the spindle and the housing. The seal is arranged at a distance from the bearing arrangement where the spindle is subjected to deflection. The seal includes a cylindrical inner surface associated with the housing, a circular slot in the spindle or in a rotating member associated with the spindle, and a piston ring arranged in the slot and abutting against the cylindrical inner surface.

A centrifugal mechanical separator comprises a disk stack formed by an additive manufacturing process (i.e., 3D printing), where the stack comprises a plurality of disk elements (which may range anywhere from a few to a few hundred). The disk stack is positioned within a proper-sized bowl (with proper inlet and outlet ports), which may also formed using an additive manufacturing process. A bowl cover and inlet/outlet assembly may also be formed using additive manufacturing, where the various dimensions and tolerances of each component (disk stack, bowl, bowl cover, and inlet/outlet assembly) are carefully controlled by the additive manufacturing process, reducing the costs and complexities associated with traditional centrifuge manufacture.

A method for mounting a stack of separating discs in a centrifugal separator bowl comprising a bowl body and a bowl hood includes mounting and securing the stack of separating discs on a distributor; placing and rotatably fixing the distributor in the bowl body; mounting the bowl hood on the bowl body; arranging a compression tool for compressing the stack of separating discs; fastening the screw with a second threaded end in a first (threading) of the distributor; tightening said nut, in relation to said first threaded end of said screw in such a manner that said distributor is lifted to an upper position; fixing the distributor in its upper position; and dismounting the compression tool. A compression tool for performing the method includes a support, a screw and a nut in accordance to above. A centrifugal separator kit includes a centrifugal separator and the compression tool.

A method for mounting a stack of separating discs in a centrifugal separator bowl comprising a bowl body and a bowl hood includes mounting and securing the stack of separating discs on a distributor; placing and rotatably fixing the distributor in the bowl body; mounting the bowl hood on the bowl body; arranging a compression tool for compressing the stack of separating discs; fastening the screw with a second threaded end in a first (threading) of the distributor; tightening said nut, in relation to said first threaded end of said screw in such a manner that said distributor is lifted to an upper position; fixing the distributor in its upper position; and dismounting the compression tool. A compression tool for performing the method includes a support, a screw and a nut in accordance to above. A centrifugal separator kit includes a centrifugal separator and the compression tool.

A disc stack of frustoconical separation discs is configured to be mounted in a separation chamber of a centrifugal separator. The discs are stacked upon each other in a manner forming narrow separation spaces between adjacent discs. The discs are welded to each other at radially outer portions of the discs. A rotor unit for a centrifugal separator, a centrifugal separator including a rotor unit, a method of providing a disc stack of frustoconical separation discs, and a method of providing a rotor unit for a centrifugal separator are also disclosed.

A disc stack of frustoconical separation discs is configured to be mounted in a separation chamber of a centrifugal separator. The discs are stacked upon each other in a manner forming narrow separation spaces between adjacent discs. The discs are welded to each other at radially outer portions of the discs. A rotor unit for a centrifugal separator, a centrifugal separator including a rotor unit, a method of providing a disc stack of frustoconical separation discs, and a method of providing a rotor unit for a centrifugal separator are also disclosed.

A separator disc for a centrifuge, such as for a separator, is provided. The separator disc is designed to be arranged in a separator disc stack in the interior of a drum of the centrifuge in order to separate a material mixture. The separator disc has a truncated cone shell-like main part produced from a blank in a forming method and has an inner surface, an outer surface, and at least one functional element applied thereon. The at least one functional element is produced using an additive manufacturing method.

A separator disc for a centrifuge, such as for a separator, is provided. The separator disc is designed to be arranged in a separator disc stack in the interior of a drum of the centrifuge in order to separate a material mixture. The separator disc has a truncated cone shell-like main part produced from a blank in a forming method and has an inner surface, an outer surface, and at least one functional element applied thereon. The at least one functional element is produced using an additive manufacturing method.

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 spot-formed 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, and the plurality of spot-formed spacing members are tip-shaped and taper from a base at the surface of the separation disc towards a tip extending a height from the surface. A stack of separation discs, a centrifugal separator and a method for separating at least two components of a fluid mixture are also disclosed.

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 spot-formed 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, and the plurality of spot-formed spacing members are tip-shaped and taper from a base at the surface of the separation disc towards a tip extending a height from the surface. A stack of separation discs, a centrifugal separator and a method for separating at least two components of a fluid mixture are also disclosed.