Corrosion-resistant coalescer cartridge – four grades for light oil dehydration.

1. Working Medium Corrosion Characteristics & Filter Media Failure Risks

Aite Corrosion-Resistant Coalescer & Separator Cartridge is engineered as the core purification component for light oil dehydration 

systems – covering naphtha, gasoline, aviation kerosene, solvent oil, and light distillate oil refining processes. These systems handle

 complex corrosive mixed media that demand specialized filter media adaptation.

The mixed medium in these applications contains multiple corrosive components:

· Aqueous corrosive phase: Dissolved inorganic acid (hydrochloric acid, sulfurous acid), organic carboxylic acid, chloride ions, 

sulfide, alkaline neutralizer residues, free water, and emulsified micro-water droplets

· Oil-phase corrosive medium: Mercaptan, thioether, elemental sulfur, aromatic hydrocarbon solvent, trace acid-base neutralization 

salt crystals

· Auxiliary additives: Demulsifier, anti-oxidant, pipeline cleaning solvent with weak polar corrosion

Medium operating temperature ranges from normal temperature to 85°C. The alternating contact of oil and water creates a long-term 

dual-phase corrosion environment on filter media – requiring users to select corrosion-resistant customized Aite Corrosion-Resistant

 Coalescer & Separator Cartridge to avoid rapid media failure and separation efficiency attenuation.

If the filter material's corrosion resistance grade does not match the medium composition, Aite Corrosion-Resistant 

Coalescer & Separator Cartridge will suffer premature failure – including fiber matrix hydrolysis and chain breakage,

 coalescing functional coating shedding, salt crystal embrittlement, and permanent media surface blockage.

As a professional manufacturer specializing in import substitution filter consumables (not an authorized brand distributor),

 we deliver Aite Corrosion-Resistant Coalescer & Separator Cartridge with stable filtration performance, significantly shorter delivery 

cycles, and substantially lower procurement costs for industrial facilities worldwide.

2. Four Grades of Corrosion-Resistant Coalescer Filter Media

Aite Corrosion-Resistant Coalescer & Separator Cartridge is available in four media grades – all passing alternating oil-water 

dual-phase corrosion immersion tests and complying with liquid coalescing separation industry test standards.

2.1 Grade 1: Standard Borosilicate Glass Fiber Media (Mild Corrosion Light Oil)

Applicable Medium: Clean aviation kerosene, low-sulfur solvent oil, inlet water cut ≤0.1%, medium pH 6–8, chloride ion ≤10ppm, 

continuous temperature ≤60°C. Composite Structure: Single-layer uniform borosilicate glass fiber substrate with single hydrophilic 

coalescing impregnation layer. Aging Benchmark: After 800h immersion in neutral light oil with trace free water, fiber strength 

retention ≥87%, separation efficiency attenuation ≤4%. Matching Accessories: Galvanized steel skeleton, polyurethane end cap 

adhesive, NBR sealing ring. Restriction: Not applicable for medium containing sulfur compounds, high chloride ion, and strong

 aromatic solvent.

2.2 Grade 2: Modified Acid-Resistant Glass Fiber Media (Medium Corrosion)

Applicable Medium: Light oil with trace acid, inlet water cut ≤0.3%, pH 4–6, chloride ion ≤50ppm, temperature ≤75°C. 

Composite Structure: Double-layer gradient glass fiber with acid-resistant impregnation and fluorinated hydrophilic modification. 

Aging Benchmark: After 1000h immersion, fiber strength retention ≥90%, separation efficiency attenuation ≤2.5%. Matching 

Accessories: 304 stainless steel skeleton, epoxy adhesive, FKM sealing ring.

2.3 Grade 3: Fluorinated Solvent-Resistant Composite Media (High Corrosion)

Applicable Medium: Aromatic solvent-containing light oil, pH 3–5, chloride ion ≤100ppm, temperature ≤85°C. Composite Structure:

 Multi-layer glass fiber with PTFE fluorinated isolation film and solvent-resistant impregnation. Aging Benchmark: After 1200h

 immersion, fiber strength retention ≥93%, separation efficiency attenuation ≤1.8%. Matching Accessories: 316L stainless steel

 skeleton, fluorine-epoxy adhesive, modified FKM sealing ring.

2.4 Grade 4: Heavy-Duty Anti-Corrosion Fluorinated Media (Extreme Corrosion)

Applicable Medium: High-sulfur, high-chloride, strong aromatic light oil, pH 2–4, temperature ≤85°C. Composite Structure: 

Full fluorinated composite glass fiber with heavy-duty anti-corrosion coating. Aging Benchmark: After 1500h immersion, 

fiber strength retention ≥96%, separation efficiency attenuation ≤1.2%. Matching Accessories: 316L stainless steel skeleton, 

full fluorine adhesive, full fluorine FKM sealing ring.

3. Supporting Component Matching Standards

Aite Corrosion-Resistant Coalescer & Separator Cartridge requires complete supporting component matching with consistent 

corrosion resistance grade:

Media Grade Skeleton Material Adhesive Sealing Ring

Grade 1 Galvanized steel Polyurethane NBR

Grade 2 304 stainless steel Epoxy FKM

Grade 3 316L stainless steel Fluorine-epoxy Modified FKM

Grade 4 316L stainless steel Full fluorine Full fluorine FKM

4. On-Site Judgment Criteria for Corrosion Attenuation

Monitor Aite Corrosion-Resistant Coalescer & Separator Cartridge for these signs of corrosion-related failure:

· Rapid differential pressure rise – indicates media surface blockage from corrosion sludge

· Outlet water content exceeding standard – indicates coalescing coating degradation

· Fiber shedding downstream – indicates fiber matrix hydrolysis and chain breakage

· Pleat collapse or media perforation – indicates severe structural degradation

5. Preventive Operation Control Measures

To maximize service life of Aite Corrosion-Resistant Coalescer & Separator Cartridge:

· Monitor inlet water content and pH value regularly

· Test chloride ion and sulfide concentration monthly

· Record differential pressure per shift

· Replace elements when differential pressure reaches alarm threshold

· Store spare elements in clean, dry environment

6. Frequently Asked Questions (FAQ)

Q1: What is the Aite Corrosion-Resistant Coalescer & Separator Cartridge designed for?

A: Aite Corrosion-Resistant Coalescer & Separator Cartridge is designed for light oil dehydration systems handling corrosive mixed 

media – including naphtha, gasoline, aviation kerosene, solvent oil, and light distillate oil refining processes.

Q2: What corrosive components does the Aite Corrosion-Resistant Coalescer & Separator Cartridge resist?

A: Aite Corrosion-Resistant Coalescer & Separator Cartridge resists aqueous corrosive phases (inorganic acid, chloride ions, sulfide), 

oil-phase corrosive media (mercaptan, thioether, aromatic solvent), and auxiliary additives (demulsifier, anti-oxidant).

Q3: What media grades are available for the Aite Corrosion-Resistant Coalescer & Separator Cartridge?

A: Aite Corrosion-Resistant Coalescer & Separator Cartridge is available in four grades – Grade 1 for mild corrosion,

 Grade 2 for medium corrosion, Grade 3 for high corrosion, and Grade 4 for extreme corrosion.

Q4: How do I select the correct media grade for my application?

A: Selection depends on medium pH value, chloride ion concentration, sulfide content, aromatic solvent content, 

and operating temperature. Contact our technical team for Aite Corrosion-Resistant Coalescer & Separator Cartridge configuration 

assistance.

Q5: What are the signs of corrosion-related failure?

A: Signs include rapid differential pressure rise, outlet water content exceeding standard, fiber shedding downstream, 

and pleat collapse or media perforation in Aite Corrosion-Resistant Coalescer & Separator Cartridge.

Q6: What supporting components are matched with each media grade?

A: Aite Corrosion-Resistant Coalescer & Separator Cartridge uses galvanized steel skeleton and NBR seals for Grade 1, 304 stainless

 steel and FKM for Grade 2, 316L stainless steel and modified FKM for Grade 3, and 316L stainless steel and full fluorine FKM for

 Grade 4.

Q7: What is the operating temperature range for the Aite Corrosion-Resistant Coalescer & Separator Cartridge?

A: Aite Corrosion-Resistant Coalescer & Separator Cartridge operates from normal temperature to 85°C depending on media grade

 selected.

Q8: What documentation is provided with the Aite Corrosion-Resistant Coalescer & Separator Cartridge?

A: Each shipment includes material certificates, corrosion resistance test reports, dimensional inspection records, 

and factory quality certificates.

Q9: Can the Aite Corrosion-Resistant Coalescer & Separator Cartridge be customized?

A: Yes. Aite Corrosion-Resistant Coalescer & Separator Cartridge supports customization – including special media grades, 

dimensions, and sealing materials based on specific medium composition.

Q10: What industries use the Aite Corrosion-Resistant Coalescer & Separator Cartridge?

A: Aite Corrosion-Resistant Coalescer & Separator Cartridge is widely used in naphtha processing, gasoline refining, aviation 

kerosene dehydration, solvent oil production, and light distillate oil refining.

Q11: How often should the Aite Corrosion-Resistant Coalescer & Separator Cartridge be replaced?

A: Replace Aite Corrosion-Resistant Coalescer & Separator Cartridge when differential pressure reaches the alarm threshold,

 or when outlet water content exceeds standard despite proper flow matching.

Q12: Can I order samples of the Aite Corrosion-Resistant Coalescer & Separator Cartridge before bulk purchase?

A: Yes. We support paid sample orders with production lead time of approximately 7–10 days. Sample costs are fully deductible

 from your first bulk order upon approval.

Aite Corrosion-Resistant Coalescer & Separator Cartridge – four corrosion resistance grades, matched supporting components, 

extended service life in corrosive light oil environments. Contact us today for a free medium analysis and competitive 

factory-direct quotation within 24 hours.