The Schmidt^® Delta series all-welded plate heat exchanger adopts the design of sealing based on the full welding process, with the integrated plate bundle formed through welding of plates based on the advanced laser welding technology, which eliminates the need for use of gaskets for sealing, thereby significantly enhancing the equipment reliability and effectively solving the sealing problem. Therefore, the equipment can operate stably under complex working conditions, ensuring high safety and efficiency in the heat exchange process.