Heat exchanger plate, and a plate heat exchanger

A heat exchanger plate configured to be comprised by a plate heat exchanger,

• the heat exchanger plate having a quadrilateral shape with two opposite parallel primary sides and two opposite parallel secondary sides, and a longitudinal central axis being parallel with the primary sides and with an extension plane of the heat exchanger plate, the heat exchanger plate comprising:
• a heat exchanger area having a corrugation of ridges and valleys, which have an inclination in relation to the longitudinal central axis, wherein the corrugation forms a theta value related to the inclination, the ridges and valleys extending along an extension,
• four porthole areas each located at a respective corner of the heat exchanger plate and each comprising a respective porthole extending through the heat exchanger plate, and
• an edge area extending around and adjoining the heat exchanger area and the porthole areas,
• wherein the heat exchanger area comprises a main area and a local part area extending along one of the primary sides and adjoining the edge area and one of the porthole areas, and
• wherein the valleys of the local part area taper towards the longitudinal central axis so that a width of a first part of the valleys of the local part area is less than a width of a second part of the valleys of the local part area, the first part of the valleys of the local part area being closer to the longitudinal central axis than the second part of the valleys of the local part area.