Abstract: The present invention relates to a support for a filtration membrane configuration formed with a first set of projections and a second set of projections in opposite directions. At least some of the first projections may be shaped with top areas forming contact face towards a filtration membrane configuration. The support for a filtration membrane may be formed with a first set of projections and a second set of projections in opposite directions, where at least some of the first projections are connected to a porous sheet forming support for said filtration membrane. The filtration membrane may be positioned directly on the porous sheet, or other in a sandwiched construction including other elements.

Abstract: A plate heat exchanger with stacked plates having dimples forming contact faces between the plates. To obtain a good balance between strength and flow conditions, the dimples are arranged in a matrix pattern with a distance X1 between centers of dimples in adjacent rows and a distance X2 between centers of dimples in adjacent columns, where the dimples have a circumference C and where C/X1 is in the range of 1,03-2,27.