Abstract: A valve arrangement in particular four-way switch, for an adsorber station of an air separation plant, having a first valve device comprising a first gas inlet/gas outlet, a second valve device, comprising a second gas inlet/gas outlet, and a first connecting piece, which fluidically connects a first housing section of the first device to a second housing section of the second valve device, the first connecting piece has a third gas inlet/gas outlet. A second connecting piece, fluidically connects the first housing section to the second housing section, wherein the second connecting piece has a fourth gas inlet/gas outlet.

Abstract: A method for controlling a coupled heat exchanger system having a first heat exchanger block and a second heat exchanger block. A first fluid stream is divided into a first partial current and a second partial current both flowing through the heat exchanger system. A second fluid stream flows through the first heat exchanger block counter to the first partial current. A third fluid stream flows through the second heat exchanger block counter to the second partial current. An intermediate temperature is measured on one of the heat exchanger blocks. The amount of the first partial current and the second partial current is controlled based on the current value of the intermediate temperature. This control reduces the strain on the heat exchangers by changing loads while keeping fluctuations of the intermediate temperature low.

Abstract: A valve arrangement in particular four-way switch, for an adsorber station of an air separation plant, having a first valve device comprising a first gas inlet/gas outlet, a second valve device, comprising a second gas inlet/gas outlet, and a first connecting piece, which fluidically connects a first housing section of the first device to a second housing section of the second valve device, the first connecting piece has a third gas inlet/gas outlet. A second connecting piece, fluidically connects the first housing section to the second housing section, wherein the second connecting piece has a fourth gas inlet/gas outlet.

Abstract: A method for controlling a coupled heat exchanger system having a first heat exchanger block and a second heat exchanger block. A first fluid stream is divided into a first partial current and a second partial current both flowing through the heat exchanger system. A second fluid stream flows through the first heat exchanger block counter to the first partial current. A third fluid stream flows through the second heat exchanger block counter to the second partial current. An intermediate temperature is measured on one of the heat exchanger blocks. The amount of the first partial current and the second partial current is controlled based on the current value of the intermediate temperature. This control reduces the strain on the heat exchangers by changing loads while keeping fluctuations of the intermediate temperature low.