A Heat Exchanger is a device used to efficiently transfer heat between two or more fluids—such as liquids, gases, or a combination of both—without allowing them to mix. It is widely applied in industries such as power generation, chemical processing, HVAC, refrigeration, automotive, food & beverage, and oil & gas, where controlling or recovering heat is essential for efficiency and safety. Key features of heat exchangers include their versatile designs—such as shell-and-tube, plate, finned tube, and brazed types—each tailored for specific applications. They offer high thermal efficiency by maximizing surface contact between fluids, compact construction for space savings, and durability through the use of robust materials like stainless steel, copper, or titanium. Many models are designed for easy maintenance and cleaning, ensuring long service life. Advanced designs also incorporate corrosion resistance, pressure resistance, and energy-saving capabilities.