Welded plate heat exchangers in plate-and-shell design (photo) provide a large heat exchange area in a small space, uniform distribution of pressure- and temperature-related stresses and low shell thicknesses. This firm has developed a process to execute weld seams of the plate pack as laser weld seams. This process is said to achieve greater connection cross sections and minimizes heat-affected zones and changes in the material’s microstructure. No elastomers are used, which allows operation of the heat exchangers between – 200 and 550°C. Hall 4.0, Stand M3 – M5 — Gesmex GmbH, Scherin, Germany