A disc-type centrifuge is configured to use clean water as sealing water to be supplied at high pressure to a sealing mechanism unit. A pump is disposed on a circulation pathway connecting a sealing water tank, in which the sealing water is stored, and the sealing mechanism unit. The sealing water (clean water) is circulated between the sealing water tank and the sealing mechanism unit by the pump. The pump is connected to the drive shaft of a motor that supplies a driving force to a rotating shaft and bowl and is configured so that the pump is operated by receiving the driving force of the motor.

The invention relates to a separator drum (10) with a hydraulically actuated, axially movable piston slide valve (20) which can seal off a solids space (14) from at least one solids outlet (18), wherein the piston slide valve (20) can be held in its closed position via a closing chamber (30) that can be filled with closing liquid, in particular closing water, wherein the closing chamber (30) is formed between an underside (21) of the piston slide valve (20) and a top side (35) of a drum lower part (15). According to the invention, the closing chamber (30) has a first closing chamber portion (31) near the rotation axis (R) and a second closing chamber portion (32) remote from the rotation axis (R), wherein the first closing chamber portion (31) is formed by two mutually parallel portions (22, 36) of the underside (21) of the piston slide valve (20) and of the top side (35) of the drum lower part (15), and the second closing chamber portion (32) has at least in part a conical cross section.

The invention relates to a separator drum (10) with a hydraulically actuated, axially movable piston slide valve (20) which can seal off a solids space (14) from at least one solids outlet (18), wherein the piston slide valve (20) can be held in its closed position via a closing chamber (30) that can be filled with closing liquid, in particular closing water, wherein the closing chamber (30) is formed between an underside (21) of the piston slide valve (20) and a top side (35) of a drum lower part (15). According to the invention, the closing chamber (30) has a first closing chamber portion (31) near the rotation axis (R) and a second closing chamber portion (32) remote from the rotation axis (R), wherein the first closing chamber portion (31) is formed by two mutually parallel portions (22, 36) of the underside (21) of the piston slide valve (20) and of the top side (35) of the drum lower part (15), and the second closing chamber portion (32) has at least in part a conical cross section.

A method of operating a centrifugal separator is provided. The method includes supplying a liquid mixture to be separated to the inlet of the centrifugal separator, separating the liquid mixture into at least one separated liquid component and a separated sludge component, discharging at least one separated liquid component from at least one liquid outlet of the centrifuge rotor, removing gas from a space surrounding a centrifuge rotor of the separator, to obtain a sub-atmospheric pressure in the space, and discharging a separated sludge component from at least one sludge outlet arranged at a periphery of the centrifuge rotor to the space which is delimited by a frame, wherein the discharging is performed when the sub-atmospheric pressure in the space surrounding the centrifuge rotor is within a preset pressure interval ΔP.

A method of operating a centrifugal separator is provided. The method includes supplying a liquid mixture to be separated to the inlet of the centrifugal separator, separating the liquid mixture into at least one separated liquid component and a separated sludge component, discharging at least one separated liquid component from at least one liquid outlet of the centrifuge rotor, removing gas from a space surrounding a centrifuge rotor of the separator, to obtain a sub-atmospheric pressure in the space, and discharging a separated sludge component from at least one sludge outlet arranged at a periphery of the centrifuge rotor to the space which is delimited by a frame, wherein the discharging is performed when the sub-atmospheric pressure in the space surrounding the centrifuge rotor is within a preset pressure interval ΔP.

A centrifuge includes a rotatable rotor and an assembly that is stationary during operation. The rotatable rotor is rotatably mounted in or on the stationary assembly by one or more mounting devices. The rotatable rotor has a rotatable drum and a drive element for rotating the drum as well as one or more electrical loads located on or in the rotor. The centrifuge includes at least one battery is also located on or in the rotor in order to supply the at least one load or the plurality of loads with electrical power. The load can include a data memory in the rotor or on the rotor. At least one actuator is provided as the at least one load.

Centrifuges are useful to, among other things, remove red blood cells from whole blood and retain platelets and other factors in a reduced volume of plasma. Platelet rich plasma (PRP) and or platelet poor plasma (PPP) can be obtained rapidly and is ready for immediate injection into the host. Embodiments may include valves, operated manually or automatically, to open ports that discharge the excess red blood cells and the excess plasma into separate receivers while retaining the platelets and other factors in the centrifuge chamber. High speeds used allow simple and small embodiments to be used at the patient's side during surgical procedures. The embodiments can also be used for the separation of liquids or slurries in other fields such as, for example, the separation of pigments or lubricants.

A centrifugal separator and a method of controlling a centrifugal separator are disclosed. The centrifugal separator includes a rotor delimiting therein a separation space, an inlet for liquid teed mixture, a first outlet for heavy phase, a second outlet for light phase, and at least one channel extending towards a central portion of the rotor. The method includes separating liquid feed mixture into at least the heavy phase and the light phase in the separation space, and determining at the first outlet that a pressure build-up period has passed, and thereafter determining that an abrupt pressure change takes place at the first outlet, and controlling the centrifugal separator in response to the abrupt pressure change.

A centrifugal separator and a method of controlling a centrifugal separator are disclosed. The centrifugal separator includes a rotor delimiting therein a separation space, an inlet for liquid teed mixture, a first outlet for heavy phase, a second outlet for light phase, and at least one channel extending towards a central portion of the rotor. The method includes separating liquid feed mixture into at least the heavy phase and the light phase in the separation space, and determining at the first outlet that a pressure build-up period has passed, and thereafter determining that an abrupt pressure change takes place at the first outlet, and controlling the centrifugal separator in response to the abrupt pressure change.

A self-emptying separator includes solids discharge openings each having a piston valve that is moveable moved into an opening position and into a closing position in a fluid-actuated manner. The emptying mechanism also has a control assembly assigned to the piston valve and controls the opening and closing movements of the latter. The control assembly also includes a control device and a metering device for metering and dispensing the amount of liquid required for the opening process. The metering device has a metering element that is movable in a metering chamber and which subdivides the metering chamber into a fluid chamber and a pressure chamber intended to be supplied with compressed air. The metering device has an adjusting system for metering the amount of liquid required for the opening process in the fluid chamber. The adjusting system has a measuring device that operates based on a fluidic measurement principle.