Abstract: Device for expanding tubes inserted in a finned pack of a heat exchanger including support means of the finned pack, a tool for enlarging the ends of each one of the tubes, a mandrel for the radial expansion of each one of the tubes. The device also includes axial abutment means for both enlarged ends of each one of the tubes in the contraction direction of each one of the tubes during the radial expansion operation. A method for expanding tubes carried out with such a device is also proposed.

Abstract: The invention relates to a plate heat exchanger (1) having a package of heat transfer plates (2), which are provided with through inlet ports (10) forming an inlet channel (12) through the package, and between the heat transfer plates arranged sealing means, which together with the heat transfer plates in every other plate interspace delimit a first flow passage (14) for one fluid and in each of the remaining plate interspaces delimit a second flow passage (13) for a second fluid, wherein the inlet channel (12) communicates with each first flow passage (14) by way of a first inlet passage (15), and is sealed from communication with each second flow passage by the sealing means.

Abstract: The invention relates to a plate heat exchanger (1) having a package of heat transfer plates (2), which are provided with through inlet ports (10) forming an inlet channel (12) through the package, and between the heat transfer plates arranged sealing means, which together with the heat transfer plates in every other plate interspace delimit a first flow passage (14) for one fluid and in each of the remaining plate interspaces delimit a second flow passage (13) for a second fluid, wherein the inlet channel (12) communicates with each first flow passage (14) by way of a first inlet passage (15), and is sealed from communication with each second flow passage by the sealing means.