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…showed last 75 words of 308 total…end plate. In the case of a multiple-pass design, connections also are found on the movable end. The plate heat exchanger is well known as one of the most efficient heat exchanger designs. Its basic concept - using corrugated plates for heat transfer - was introduced in the early 1930s for the food and dairy industry. Since then, plates have gone through tremendous development and now are used as standard equipment in many chemical processes.