A PLATE HEAT EXCHANGER

摘要

A plate heat exchanger comprises a plurality of heat exchanger plates (1), a first end plate (2) and a second end plate (3). The plates (1-3) are permanently joined to each other by means of a braze material. Each heat exchanger plate has a heat transfer area and a plurality of porthole areas surrounding a respective porthole. The plate heat exchanger comprises a plurality of (50, 53) having a bottom surface (51) turned towards the heat exchanger plates. At least one of the flat elements comprises an annular protrusion (52) extending from the bottom surface (51) and tightly abutting one of the porthole areas of the outermost heat exchanger plate.