PCT No. PCT/SE82/00393 Sec. 371 Date Jul. 19, 1983 Sec. 102(e) Date Jul. 19, 1983 PCT Filed Nov. 23, 1982 PCT Pub. No. WO83/01998 PCT Pub. Date Jun. 9, 1983.A plate (1) for a plate heat exchanger is provided with a corrugation pattern of ridges (4) and grooves (3) intended to rest against the corrugation pattern on an adjacent plate so that a great number of supporting points (2) are formed. On at least one of its sides, the plate has ridges provided with recessed parts (5) positioned in the areas of the supporting points (2). Thus, the number of turbulence-generating supporting points and consequently the flow resistance are reduced in an adjacent heat exchanging passage (7).
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