Abstract: A sealing device for cylindrical hollow bodies of a small diameter has a cylindrical sealing insert with two coaxially arranged, axially displaceable members and an elastic sealing ring disposed between the two members. A displacement of the two coaxial members towards one another results in an enlargement of an outer diameter of the sealing ring and contact pressure between the outer circumference of the sealing ring and the inner wall surface of the hollow body. A remote-controlled placing tool is connectable to the sealing insert for clamping and locking the sealing insert in a sealing position and for releasing the sealing insert therefrom. The tool has a clamping cylinder with a clamping piston and a clamping piston rod in the form of a hollow cylinder connected to the clamping piston. A clamping anchor is connected to the first coaxial member and a sleeve is connected coaxially and axially slidable about the anchor. The tool is further provided with a release cylinder with a release piston.

Abstract: A press for compressing elongated radioactive structural elements, with the ress having a horizontal press shaft and a removable counterpunch in place of which a transfer shaft can receive a finished pressed object. The press is remotely operable, has a minimum overall length, and assures that during compression as well as insertion of the pressed object into the transfer shaft, no small particles can escape from the press line and that the unavoidable swelling of the pressed object in the axial direction has no impact upon removal of the counterpunch and insertion of the pressed object into the transfer shaft. The press ram includes several insertable press ram sections, and the cover is divided into several cover portions. The horizontal press shaft is movably disposed in the pressing direction on a mounting base between two crosspieces interconnected by tie rods.