Abstract: The invention relates to a heat exchanger which is brazed in a brazing furnace, comprising stacked heat exchanger parts which provide first channels and second channels, and with at least two brazing materials, the one brazing material in the first channels being different than the other brazing material in the second channels. According to one alternative, said heat exchanger is improved by virtue of the fact that there is the other or the one brazing material in one or in a few of the first channels or the second channels or in one or in a few of the first and the second channels, or the other and the one brazing material are present arranged in part regions.

Abstract: The invention relates to an automation network and to automation equipment, network components and field devices for an automation network of this type. The network components transmit messages concerning their status to the automation equipment by means of a communication mechanism that functions according to field communication automation technology. Said automation equipment receives the status messages, evaluates them, monitors the operation of the network and controls said operation using the status messages. As the automation equipment thus contains the complete picture of the process and the network, it can react directly and rapidly to problems of the network. This eliminates the need, for example, for an additional SNMP/OPC server or a network management station.

Abstract: The invention relates to a plate heat exchanger, composed of trough-shaped heat exchanger plates which are stacked one in the other and whose edges bear against one another. The plates can have flow ducts, located between the heat exchanger plates for a cooling fluid and for another fluid. The flow ducts are fitted with inserts in the form of turbulator plates. The heat exchanger can include at least four inlet and outlet openings in the corners of the heat exchanger plates which form two vertical ducts for the cooling fluid and two vertical ducts for the other fluid in the stack. The inserts in the flow ducts for the cooling fluid are embodied in one part or a plurality of parts. The flow ducts for the cooling fluid are equipped, in the regions around the openings, with plate-like inserts which have guide ducts with a width, and are provided with the turbulator plate in a central region between the plate-like inserts.

Abstract: The invention relates to an automation network and to automation equipment, network components and field devices for an automation network of this type. The network components transmit messages concerning their status to the automation equipment by means of a communication mechanism that functions according to field communication automation technology. Said automation equipment receives the status messages, evaluates them, monitors the operation of the network and controls said operation using the status messages. As the automation equipment thus contains the complete picture of the process and the network, it can react directly and rapidly to problems of the network. This eliminates the need, for example, for an additional SNMP/OPC server or a network management station.

Abstract: The invention relates to a plate heat exchanger, composed of trough-shaped heat exchanger plates which are stacked one in the other and whose edges bear against one another. The plates can have flow ducts, located between the heat exchanger plates for a cooling fluid and for another fluid. The flow ducts are fitted with inserts in the form of turbulator plates. The heat exchanger can include at least four inlet and outlet openings in the corners of the heat exchanger plates which form two vertical ducts for the cooling fluid and two vertical ducts for the other fluid in the stack. The inserts in the flow ducts for the cooling fluid are embodied in one part or a plurality of parts. The flow ducts for the cooling fluid are equipped, in the regions around the openings, with plate-like inserts which have guide ducts with a width, and are provided with the turbulator plate in a central region between the plate-like inserts.