Hydrolysis is the main degradation pathway in phosphate ester systems. Because phosphate esters are hydroscopic, moisture control is a critical step in phosphate ester maintenance. Stealth EHCTM uses patented technology that removes moisture from phosphate ester fluids by introducing a steady stream of clean, dry air in the reservoir. This enhances reservoir breathing systems by actively and continuously purging and dehydrating the reservoir head space and removing water from the fluid