Replacement Coalescer Filter Element for FAUDI Model A.1-559

Filtration & Coalescence Principle

The FAUDI A.1-559 coalescing filter adopts progressive gradient filtration technology for two-stage purification. The outer coarse fiber layer intercepts large particles, sediment and scale, protecting the inner precision fiber layer from premature clogging. As the fluid flows inward through the hydrophilic glass fiber medium, micron-sized water droplets and oil aerosols are captured by the dense fiber network.

Through continuous fluid scouring and molecular adhesion, tiny dispersed droplets collide and merge into large-diameter droplets. Once gravity overcomes fluid suspension force, enlarged water droplets separate and settle into the filter sump, while clean medium flows downstream. This layered purification method ensures uniform fluid distribution and maximizes dirt holding capacity throughout the service cycle.

Core Structural Advantages

1. Aviation-Grade Gradient Glass Fiber Media

The element adopts high-purity borosilicate glass fiber with progressive density distribution, featuring excellent chemical stability and super hydrophilicity. It is compatible with aviation kerosene, diesel, gasoline, and light hydrocarbon solvents, achieving stable micro-droplet removal. The layered filtration structure significantly improves dirt holding capacity and extends service life.

2. Reinforced End Cap & NBR Sealing System

The end cap is manufactured from high-strength glass fiber reinforced polyamide material, with precise dimensions matching original FAUDI A.1-559 specifications. Equipped with original-standard NBR (Buna-N) rubber seals, it provides reliable zero-leakage sealing under pressure cycling and supports plug-and-play installation without vessel modification.

3. Epoxy-Coated Steel Support Frame

The built-in epoxy-coated steel central tube delivers strong radial support, effectively preventing media collapse and deformation under high differential pressure. Full hot-melt integrated sealing eliminates adhesive aging and dissolution risks, avoiding secondary contamination to the medium.

Applications

LEFILTER FAUDI A.1-559 replacement coalescer is widely used in aviation fuel depots, refinery fuel processing plants, bulk fuel storage terminals, and industrial light hydrocarbon purification systems. It effectively removes free water, fine solid particles and oil mist, protecting compressors, flow meters, control valves and pipeline systems from corrosion, liquid hammer and abrasion.

Industry Compliance

All LEFILTER A.1-559 coalescing filters undergo rigorous factory testing to ensure full interchangeability with original FAUDI products. The elements comply with international filtration standards including ISO 2941 (collapse & burst resistance), ISO 2942 (fabrication & integrity test), and ISO 16889 (multi-pass performance testing), as well as EI 1581 aviation filtration standards. Upgraded fiber formulation provides stronger contaminant tolerance and longer service life than generic alternatives.

FAQ

Q1: Is LEFILTER A.1-559 fully interchangeable with the original FAUDI filter?

Yes. LEFILTER A.1-559 is a direct drop-in replacement that fully matches the original FAUDI dimensional tolerances, flow direction (out-to-in), end cap structure, and NBR sealing standard. It requires no equipment modification or on-site adjustment for installation.

Q2: What is the recommended replacement interval for the A.1-559 coalescer?

Service life depends on operating conditions, contaminant load, and fluid type. The recommended maximum differential pressure is 1.0 bar (15 psi), with typical service life up to 36 months under normal conditions. Key indicators for replacement include reaching maximum allowable differential pressure, visible media degradation, or decreased water removal efficiency. Regular monitoring helps optimize lifespan and system reliability.

Q3: What fluids is the A.1-559 coalescer compatible with?

The A.1-559 is compatible with aviation kerosene, jet fuel, diesel, gasoline, turbine oil, and various light hydrocarbon solvents. The hydrophilic borosilicate glass fiber media features excellent chemical inertness against these fluids, ensuring stable coalescing performance without media degradation.

Q4: Why choose LEFILTER replacement over OEM Faudi elements?

LEFILTER replacement elements deliver OEM-equivalent performance at a competitive price point, significantly reducing maintenance costs without compromising quality. They are manufactured using ISO-certified processes with upgraded gradient fiber media that provides higher dirt holding capacity and longer service life than generic alternatives. With stable stock supply and rigorous quality control, LEFILTER helps industrial users reduce procurement costs and shorten maintenance cycles while maintaining consistent filtration stability.

Technical Specifications