Heat exchanger plate for a plate heat exchanger, and a plate heat exchanger

A heat exchanger plate for a plate heat exchanger for heat exchange between at least a first fluid and a second fluid, the heat exchanger plate comprising:

• a heat exchanger area comprising:
• a first end zone,
• a central main zone adjoining the first end zone,
• a second end zone adjoining the central main zone, and a corrugation of ridges and valleys, which extends on the first end zone, the central main zone and the second end zone, and
• a longitudinal center axis, which extends along and through the first end zone, the central main zone and the second end zone,
• wherein each ridge and valley extends along a respective continuous line, the continuous lines being at least partly curved
• and forming an angle of inclination with the longitudinal center axis, and the angle of inclination at the longitudinal center axis being less steep for substantially each of the continuous lines at the first end zone than at the central main zone, wherein the heat exchanger plate comprises two portholes located on the first end zone, and two portholes located on the second end zone.