Replacement Faudi 60.646 Series Separator Filter Element – Complete Model Overview

Introduction

The Faudi 60.646 series separator elements are high-performance second-stage components engineered for use in filter/water separator (FWS) systems across aviation fuel, petrochemical, and marine applications . Designed as effective water barriers with outside-to-inside flow direction, these 6-inch (152 mm) outer diameter elements feature advanced hydrophobic surfaces that repel water while allowing clean fuel to pass through .

Qualified to EI 1581 6th Edition Category C standards, the 60.646 series replacement elements are constructed with epoxy-coated steel inner tubes, glass fibre reinforced polyamide end caps stamped with date of manufacture and ID number, and NBR (Buna-N) end seals for leak-proof performance . The hydrophobic screen is available in two configurations: Teflon®-coated stainless steel mesh (reusable) or synthetic plastic mesh (disposable) .

Working Principle

The 60.646 separator elements operate as the second stage in filter/water separator systems :

1. Solid Filtration: Fuel flows from outside to inside, trapping solid contaminants such as rust and particulate matter.

2. Hydrophobic Separation: The Teflon®-coated or synthetic screen effectively repels water while allowing fuel to permeate. Water droplets collect on the surface until they become large enough to fall into the collection sump .

3. Gravity Settling: Separated water collects at the bottom of the housing for periodic drainage.

This design ensures that water droplets not captured during the coalescer stage are effectively blocked, delivering clean, dry fuel .

Key Applications

• Aviation Fuel Systems: Jet A-1 purification meeting ASTM D1655 standards

• Ground Refueling Equipment: Mobile and stationary refuelling units 

• Tank Farms & Marine Terminals: Fuel storage and loading operations 

• Refineries: Hydrocarbon fluid processing 

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Performance Benefits

• High Water Removal: Up to 99.5% separation efficiency

• Reusable Option: Teflon®-coated elements can be cleaned and reused, reducing maintenance costs 

• Durable Construction: Epoxy-coated steel inner tube ensures structural integrity 

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Frequently Asked Questions (FAQ)

Q1: What is the difference between the "D" and "P" suffix versions in the 60.646 series?

A: The "D" suffix indicates elements with Teflon®-coated stainless steel screen mesh, which can be cleaned, inspected, and reused during coalescer element changes. Minor media damage can be repaired. The "P" suffix denotes synthetic plastic mesh elements designed for single-use disposable applications, which should be replaced at each coalescer element change .

Q2: What is the maximum service life for these separator elements?

A: According to manufacturer recommendations, Teflon®-coated elements have a maximum service life of 120 months, while synthetic mesh elements have a service life of 36 months. Both have a maximum storage life of 60 months under recommended conditions (20°C and max. 50% humidity) .

Q3: Are these replacement elements compatible with existing Faudi 60.646 filter housings?

A: Yes, these replacement elements are engineered as drop-in equivalents for Faudi 60.646 series filter vessels. They feature identical dimensions—152mm (6-inch) outside diameter, 89mm (3-inch) inside diameter, and matched length specifications—along with the same end-cap configurations and NBR sealing geometry. No system modifications are required for installation .

Q4: What industry standards do these separator elements comply with?

A: The 60.646 series replacement elements are qualified to EI 1581 6th Edition Category C standards for aviation fuel filtration . They are also manufactured under ISO 9001, ISO 14001, and ISO 45001 certified quality management systems. Elements are stamped with date of manufacture and ID number according to EI specification .

Technical Specifications

• Qualification: EI 1581 6th Edition, Category C 

• Flow Direction: Outside-to-In 

• Operating Temperature: -30°C to +80°C 

• Maximum Operating Pressure: Up to 100 bar

• Media Types: Teflon®-coated stainless steel mesh (cleanable/reusable) or synthetic plastic mesh (disposable) 

• End Caps: Glass fibre reinforced polyamide, stamped with date of manufacture and ID number per EI standards 

• Seals: NBR (Buna-N) gaskets 

• Filtration Efficiency: Particles down to 0.3 µm; water droplets down to 1 µm