Heat Transfer Fluid S2, used with our BW-200LDR system, is a highly refined mineral oil specifically designed for closed-loop systems with bulk temperatures of up to 290°C (600°F). Its narrow-cut base oil has a high distillation point, minimizing pressure buildup during operation. Excellent thermal and oxidation stability prevent breakdown and deposit formation, extending oil life and reducing maintenance. A high flash point and low evaporation rate make it ideal for high-temperature use, while good low-temp fluidity ensures reliable cold start circulation. The fluid offers high specific heat and thermal conductivity for efficient heat transfer and energy savings. It also resists rust and corrosion and can be more easily recycled or disposed of than synthetic or naphthenic alternatives.