Abstract: A heat exchanger for counterflow and parallel flow is comprised of a plurality of stacks of form-stamped individual plates that are combined to pairs and the pairs are assembled atop one another to form the stacks. A first flow channel for a first medium is formed between the plates of each pair, and a second flow channel for the second medium is formed between adjacent pairs. The stacks are arranged directly adjacent to one another to form a stack assembly. Each first and second flow channel has an inlet and an outlet arranged diagonally opposite one another. The inlets and outlets of the first flow channels are arranged atop one another as are the inlets and the outlets of the second flow channels. The inlets and the outlets of the first flow channels are staggered relative to the inlets and outlets of the second flow channels by half a height of the pairs.

Abstract: A device for handling bulk material, especially in marine transportation, comprises a pressure vessel having at least two members for mechanically enclosing a volume of the bulk material to be conveyed. The pressure vessel is equipped with pressure fluid activated push rods for moving the two members between an open and closed position to thereby grab a volume of the bulk material. The two members are preferably two essentially identical halves. A supply conduit is connected to the pressure vessel for supplying a pressurized gas thereto. A discharge conduit is connected to the pressure vessel for conveying the volume of bulk material out of the pressure vessel with the aid of the pressurized gas.