Abstract: A plate heat exchanger comprising a set of heat exchanger plates arranged between a frame plate and a pressure plate. A guide bar guides the set of heat exchanger plates and the pressure plate relatively the frame plate, a tightening member is arranged on the guide bar and a plate engager is arranged intermediate the tightening member and the pressure plate for allowing the tightening member to press the pressure plate in a direction towards the frame plate. The plate engager is releasable and the tightening member is configured to protect the guide bar, such that the pressure plate may move in a direction from the frame plate and past the tightening member when the plate engager is released. A related method is also described.

Abstract: The invention relates to a plate heat exchanger (1) including a first and second end plate (2, 3), and a core of heat exchanger plates (4) arranged between the first and second end plate (2, 3), whereby a plurality of threaded tightening bolts (5a, 5b, 5c) extend between the first and second end plate (2, 3) and are arranged, with the aid of nuts (6) or the like, to hold these plates at a desired distance from each other in order to hold the core of heat exchanger plates together, wherein at least one guiding element (7, 7a, 7b) for guiding the first end plate (2) and the heat exchanger plates (4) relatively the second end plate (3) is releasably arranged on at least one of the threaded tightening bolts (5a, 5b), which guiding element (7a) extends through an aperture (8) in the first end plate (2), where the at least one guiding element (7a, 7b) is provided with a through-hole (9) to receive the at least one of the threaded tightening bolts (5a, 5b) and an external geometry (10) corresponding to a cut-out (11