The Bendix AD-HF Air Dryer is designed to remove oil aerosols from a vehicle's air system. The AD-HF is a two-piece, high-strength aluminum casting that features an integrated purge volume reservoir, which eliminates the need for a steel tank. The casting is corrosion-resistant and engineered for better flow characteristics, increasing the AD-HF’s application capabilities through improved dryer air flow capacity. The standard AD-HF incorporates 200cc of integral purge volume. There is also an optional extended purge version with 300cc of integral purge volume.