Plate heat exchanger

A plate heat exchanger comprising

• a casing that forms an enclosure,
• a fluid separation device,
• a number of heat transfer plates that are joined to each other to form a plate stack that is arranged within the enclosure and has alternating first and second flow paths for a first fluid and a second fluid in between the heat transfer plates,
• the heat transfer plates having
• central openings that form a central space in the plate stack and in which the fluid separation device is arranged, such that a first part of the central opening may act as a fluid inlet and a second part of the central opening may act as a fluid outlet for the first fluid,
• first sides that act as a fluid entries for the second fluid, and second sides that are opposite the first sides and act as fluid exits for the second fluid,
• wherein
• an end plate that has a central through hole is arranged at a first end of the plate stack,
• the end plate being thicker than the heat transfer plates for providing increased mechanical support for the plate stack, the end plate thereby, in response to a change in temperature and due to thermal expansion, expanding slower than the transfer plates.