Semi-welded plate heat exchangers offer a hybrid solution for applications where gaskets may not be suitable due to fluid aggression or where higher pressures are required. They consist of laser-welded corrugated twin plates, or cassettes, on one side to form sealed flow channels, and gasketed on the other, allowing for versatile fluid handling and easy maintenance. This design not only ensures secure leakage prevention but also accommodates efficient heat transfer with the flexibility to manage different fluid types on each side. Ideal for industrial refrigeration and other high-pressure applications, these heat exchangers provide a reliable and efficient solution for robust heat transfer needs.