Floating Roofs for Hydraulic Oil Tanks: Advanced Contamination & Oxidation Control in Bulk Lubricant Storage The Engineering Paradigm: Why Low-Volatility Fluids Require Floating Decks Hydraulic oils possess exceptionally low vapor pressure, making evaporative loss a minimal financial concern. However, in large bulk storage applications, an Internal Floating Roof (IFR) is deployed to safeguard fluid purity. It acts as an absolute physical shield against atmospheric oxygen,