Brazed heat exchangers (BPHE)are pressed and baked at temperatures of 1 100⁰C for hours. This allows for higher design pressure and temperatures due to the elimination of gasketed joints. The brazing material, usually copper, carries out the function of the gaskets and frame. The BPHE are more compact, lightweight and less bulky than one with gaskets. The channel formed by the adjacent plates creates a counter current flow that leads to maximum thermal efficiency, even at low nominal input.