An SS high-pressure heat exchanger is a device that helps transfer heat between two fluids (liquids or gases) in situations where high pressure is involved. The "SS" stands for Stainless Steel, which is the material used to make the exchanger. Stainless steel is strong, resistant to corrosion, and can handle high temperatures, making it perfect for tough industrial environments. https://www.finfancooler.com/Heat-Exchanger/SS-High-Pressure-Heat-Exchanger/