Abstract: A pressure centrifuge with a process chamber enclosed by a pressure housing and a drum and a screw concentrically supported. The connections between the process chamber and the atmosphere are located in the area of bearing supports and provided with rotating mechanical seals. In order to expose the product to be processed in the process chamber to elevated pressures and temperatures a double rotating mechanical seal in the area of the bearing supports between the drum and the screw, which enclose a separate sealing chamber located within a closed cooling and lubricating medium circulation and connected by a connecting channel in the drum and a first rotating passage and a connecting channel in the screw and a second rotating passage with the part of a cooling and lubricating medium circulation located outside the pressure housing.

Abstract: A pneumatic discharge apparatus for a stripping centrifuge that has a stripping blade mounted on the stripper head and extending over the entire width of the drum. A filler body is further arranged in the stripper head, which affects the conveying flow through the stripper head so that the material being stripped is prevented from settling in a critical material settling area. Because the stripping blade extends over the entire width of the drum and the filler body is arranged in the stripper head, the discharge capacity of the pneumatic discharge apparatus is very high, and the sealing problems usually arising in vertical stripper centrifuges are largely eliminated.

Abstract: A casting mold with a feeder, particularly for producing cast iron, includes an exothermically heated feeder mass. The casting material in the cylindrical or slightly conical feeder volume of the feeder mass is kept in a liquid state until termination of the drawing in of casting material by suction into the casting cavity. The feeder volume has dimensions corresponding to the quantity of casting material drawn into the mold cavity to compensate for casting shrinkage, plus a miximum security allowance of 30 percent of the quantity of casting material drawn in. To obtain a feeder mass which is less costly than conventional feeder masses, from the point of view of simpler and more propitious temperature measurements, the feeder mass has an outside shape of a flattened sphere, a flattened ellipsoid or a flattened pear. The smallest diameter is on the side away from the casting being produced. The flattening is provided adjacent to the casting.