Full definition
Element removing contaminant particles from hydraulic oil to protect pumps, valves, and actuators. Locations: suction (coarse, 150 µm), pressure (3-10 µm, high ΔP rated), return (10-25 µm), off-line recirculation. Target cleanliness ISO 4406: servo valves 14/11/8, proportional 16/13/10, standard 18/16/13. Differential pressure collapse indicator. Filtration rating β₁₀ ≥ 75 (ISO 16889). Brands: Hydac (HF), Parker (HC), Pall (HC), MP Filtri, Argo-Hytos.