VRCOOLER launches professional BOX Cooler sea chest heat exchangers for marine engine and auxiliary system cooling. Equipped with aluminum brass or CuNi 90/10 U-tube bundles, the passive seawater cooling design removes reliance on seawater pumps to save energy. Anti-galvanic corrosion structure and ICAF anti-fouling compatibility ensure stable performance on cargo ships, dredgers and offshore vessels. Custom sizes and full classification certification available. Visit [cstheatexchanger.com] for technical parameters and solutions.