A plate for a plate heat exchanger for treatment of a liquid feed, the heat exchanger comprising a plate package having a plurality of successively arranged heat exchanger plates, the heat exchanger plate defining a first longitudinal edge, an opposite second longitudinal edge extending parallel to the first longitudinal edge and a centre axis extending substantially centrally between and in parallel with the first longitudinal edge and the second longitudinal edge, the centre axis dividing the plate into a first part extending between the first longitudinal edge and the centre axis, and a second part extending between the second longitudinal edge and the centre axis, the plate package defining first plate interspaces and second plate interspaces arranged in alternating order, each plate interspace being enclosed by a gasket extending along the first and second longitudinal edges (40 42) of each plate, the heat exchanger plate further defining: an evaporation section for vaporizing the feed, a condensation section for condensing the feed, and a separation section for separating vaporized feed and non-vaporized feed, the separation section being located between the evaporation section and the condensation section in the longitudinal direction, whereby the heat exchanger plate being corrugated in the separation section forming ridges and valleys, a ridge corresponds to a valley on the opposite side of the plate and in each plate interspace ridges fall into valleys and vice versa and whereby the condensation section and evaporation section forming a heat exchange area having a cross-corrugated pattern where opposing ridges of opposing plates contact at contact points, a first passage located between the evaporation section and the separation section in the first and second part of the plate for allowing the vaporized feed to flow from the evaporation section to the separation section, a second passage located between the separation section and the condensation section in the first part of the plate for allowing the vaporized feed to flow from the separation section to the condensation section, characterized in that a flow guiding element is located between the separation section and the second passage and extends from the first longitudinal edge towards the centre axis for reducing the flow area between the separation section and the second passage. an evaporation section for vaporizing the feed, a condensation section for condensing the feed, and a separation section for separating vaporized feed and non-vaporized feed, the separation section being located between the evaporation section and the condensation section in the longitudinal direction, whereby the heat exchanger plate being corrugated in the separation section forming ridges and valleys, a ridge corresponds to a valley on the opposite side of the plate and in each plate interspace ridges fall into valleys and vice versa and whereby the condensation section and evaporation section forming a heat exchange area having a cross-corrugated pattern where opposing ridges of opposing plates contact at contact points, a first passage located between the evaporation section and the separation section in the first and second part of the plate for allowing the vaporized feed to flow from the evaporation section to the separation section, a second passage located between the separation section and the condensation section in the first part of the plate for allowing the vaporized feed to flow from the separation section to the condensation section, characterized in that a flow guiding element is located between the separation section and the second passage and extends from the first longitudinal edge towards the centre axis for reducing the flow area between the separation section and the second passage.