High Water Content Fluids (HWCF)

High water content fluids (HWCF), high water base fluids (HWBF), 5-95 fluids or ISO HFA fluids are water soluble fluids used at very high dilution rates or very low concentration levels (i.e., ~ 90 to 95% water and ~ 5 to 10% additive concentrate). HWCF concentrates may contain petroleum oil, synthetic fluid, viscosity improvers, antifriction additives, rust inhibitors, biocides, fungicides and sludge inhibitors. High water content fluids (HWCF) have high fire-resistance compared to straight oil or emulsions. The high water content reduces or eliminates the fire hazards associated with straight oils or emulsions with high levels of oil. HWCF fluids are used in hydraulic fluid applications where a flammable fluid leaking from a break would be likely to spray onto a hot surface and ignite. The high water content of HWCF also improves cooling performance.