OEM Equivalent FAUDI MIL.3-842 Coalescing Filter | Full Series Replacement Available

LEFILTER supplies high-match aftermarket coalescing filter cartridge designed to fully replace the original FAUDI MIL.3-842. Compliant with EI 1581 aviation filtration standards, this MIL-series coalescing element is engineered for reliable solid-liquid separation in aviation fuel, diesel and light hydrocarbon processing systems. It strictly replicates the original in-to-out flow path, dimensional tolerance and NBR sealing structure, enabling direct drop-in installation without housing modification or system debugging. Adopting upgraded gradient hydrophilic glass fiber media, our MIL.3-842 replacement delivers stable coalescing performance and extended service life, helping industrial users avoid high OEM costs and long lead times of genuine FAUDI filters.

The FAUDI MIL.3-842 is a medium-duty aviation-grade coalescing element, widely applied in fuel terminal separation systems and petrochemical fluid purification units. In continuous operation, fine particulate contaminants, emulsified water and oil mist easily trigger fuel turbidity, pipeline fouling and downstream compressor failure. LEFILTER’s optimized MIL.3-842 filter features uniform fiber density distribution and pressure-resistant structural design, maintaining consistent filtration efficiency under flow fluctuation and temperature cycling, ensuring safe and stable long-cycle operation of fuel treatment systems.

Coalescing Filtration Working Principle

FAUDI MIL.3-842 adopts typical progressive gradient filtration and droplet coalescence technology. The outer coarse fiber layer performs pre-filtration to intercept large sediments and scale, protecting the inner precision media from premature clogging and ensuring full-area uniform fluid distribution.

When contaminated fluid flows inward through the high-hydrophilic inner fiber layer, invisible micro water droplets and oil aerosols are captured and adsorbed on the fiber network. Under continuous fluid scouring and molecular tension, scattered tiny droplets collide and polymerize into large-size droplets. The enlarged liquid droplets separate from the fuel medium by gravity and settle into the filter sump, while clean fluid flows downstream to complete high-standard purification.

Key Structural & Material Strength

1. Aviation-Grade Gradient Glass Fiber Media

Made of high-purity borosilicate glass fiber with graded density layout, the media features excellent chemical inertness and super hydrophilicity. It is fully compatible with various low-viscosity hydrocarbon media, achieving stable particle interception and micro-water coalescing effects without fiber shedding or performance attenuation.

2. Reinforced Composite End Cap & Standard NBR Sealing

High-strength glass-filled polyamide end caps improve structural rigidity and aging resistance. Equipped with original-standard NBR gaskets, the filter maintains zero-leakage sealing performance under cyclic pressure changes, perfectly matching FAUDI original installation interfaces.

3. Epoxy-Coated Steel Support & Integrated Hot-Melt Sealing

Built-in epoxy-coated steel central tube provides reliable anti-collapse support, preventing media deformation under high differential pressure. Full hot-melt bonding process eliminates adhesive dissolution and secondary pollution risks, supporting 24-hour uninterrupted industrial operation.

Full FAUDI Interchangeable Filter Series 

A Series: A.1-559、A.1-842、A.3-842、A.4-727、A.4-842、A.6-467、A.6-842

Y Series: Y.1-842/5、Y.4-467/5、Y.4-559/5、Y.4-842/5、Y.6-362/5、Y.6-559/5、Y.6-842/5、Y.7-362/5、Y.7-842/5、Y.7-1422/5

MIL Series: MIL.6-362、MIL.6-559、MIL.6-842、MIL.1-842、MIL.3-467、MIL.3-559、MIL.3-842、MIL.3-965、MIL.4-279、MIL.4-362、MIL.4-559、MIL.4-727、MIL.4-842、MIL.4-965、MIL.4-1093、MIL.4-1422、MIL.7-362、MIL.7-559、MIL.7-727、MIL.7-842、MIL.7-965、MIL.7-1093、MIL.7-1422

K Series: K.1-842、K.3-467、K.3-559、K.3-842、K.3-965、K.4-279、K.4-362、K.4-559、K.4-727、K.4-842、K.4-965、K.4-1093、K.4-1422、K.7-362、K.7-559、K.7-727、K.7-842、K.7-965、K.7-1093、K.7-1422

P Series: P.1-842、P.3-467、P.3-559、P.3-842、P.3-965、P.4-279、P.4-362、P.4-559、P.4-727、P.4-842、P.4-965、P.4-1093、P.4-1422、P.7-362、P.7-559、P.7-727、P.7-842、P.7-965、P.7-1093、P.7-1422

D & DC Series: D.1-362、D.1-842、D.6-467、DC.1-842-xx、DC.4-279-xx、DC.4-362-xx、DC.4-559-xx、DC.4-727-xx、DC.4-842-xx、DC.4-1093-xx、DC.4-1422-xx、DC.7-362-xx、DC.7-559-xx、DC.7-727-xx、DC.7-842-xx、DC.7-1093-xx、DC.7-1422-xx

Application Scenarios

LEFILTER FAUDI MIL.3-842 coalescing filter is widely used in aviation fuel depots, military fuel supply systems, petrochemical refineries and industrial light hydrocarbon purification. It effectively removes free water, oil mist and fine solid contaminants, protecting downstream compressors, precision instruments and pipeline systems from liquid hammer, corrosion and abrasion, improving overall fuel quality and system operational stability.

Product Advantages

Every MIL.3-842 filter undergoes strict bubble point and pressure resistance testing before delivery to guarantee 100% interchangeability with original FAUDI components. Upgraded fiber structure delivers higher dirt holding capacity and longer service life than generic alternatives, reducing replacement frequency and maintenance costs. We support full-series FAUDI filter one-stop procurement, sufficient spot inventory and fast global delivery with professional technical after-sales support.

FAQ for FAUDI MIL.3-842 Coalescing Filter

Q1: Is LEFILTER MIL.3-842 fully compatible with original FAUDI equipment?

A1: Yes. It fully matches the original size, in-to-out flow direction and sealing interface, supporting direct drop-in replacement without any equipment modification.

Q2: What is the core function of FAUDI MIL.3-842?

A2: It is an aviation-grade coalescing element dedicated to removing fine solid particles, emulsified oil mist and free water in fuel and light hydrocarbon media.

Q3: What are the standard working parameters?

A3: Working temperature ranges from -30℃ to +80℃, max differential pressure 5.2 bar. Replace the filter timely when differential pressure reaches 1.0 bar.

Q4: What industries is MIL.3-842 suitable for?

A4: Ideal for aviation fuel terminals, military fuel systems, petrochemical processing and light hydrocarbon purification working conditions.

Q5: Can it support long-term continuous operation?

A5: Yes. Reinforced steel support and integrated hot-melt sealing ensure stable structural performance for 24-hour continuous industrial operation.

Q6: Do you supply other FAUDI series replacement filters?

A6: We provide complete A/Y/MIL/K/P/D/DC series FAUDI coalescing filters, supporting one-stop batch procurement for all project needs.

Q7: Do you offer sample testing and customized services?

A7: Free sample verification is available. Customized logo, packaging and engineering bulk solutions are supported for global clients.