Technical Parameters Category Specification Part Number 253-3038-004 Product Type Hydraulic Filter Element / Cartridge Industry Aerospace Filtration Rating Absolute Filtration Rating, typically 3 microns. This is a critical parameter, meaning it is certified to capture 99.97% or more of particles at the stated size (3 µm). Beta Ratio Very high at its rated size (e.g., β₃ ≥ 1000), indicating exceptional filtration efficiency. Construction Material Filter Media Fine glass fiber or other high-performance material. End Caps & Center Tube Typically metal (aluminum or steel). Seals Viton or other aerospace-grade elastomers compatible with Skydrol, Mil-PRF-5606, and other aircraft hydraulic fluids. Bypass Valve Integral, set to open at a specific differential pressure to protect the system if the element becomes clogged. Test Standards Manufactured and tested in accordance with ISO 2941 (Burst Pressure), ISO 2942 (Bubble Point), and ISO 2943 (Material Compatibility).
