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The Ultimate Guide to High-Efficiency Coalescing Filter Cartridges
Coalescing filter cartridges are the critical final defense in ensuring the purity of compressed air, natural gas, and process gases. At [Your Company Name], we engineer premium coalescing cartridges designed to deliver exceptional performance, reliability, and value, protecting your sensitive downstream equipment and processes.
What is a Coalescing Filter Cartridge?
A coalescing filter cartridge is a specialized depth filter designed to remove liquid aerosols (like oil and water) and sub-micron solid particles from a gas stream. Unlike simple particulate filters, coalescers work by causing microscopic liquid droplets to merge (coalesce) into larger drops, which are then drained away by gravity. This results in exceptionally clean, dry gas.
How Does a Coalescing Filter Work?
Our cartridges utilize a multi-stage, depth-loading design for maximum efficiency:
Pre-Filtration Layer: Captures and retains larger solid particles.
Coalescing Media Core: The heart of the cartridge. As the gas flows through a dense matrix of fine borosilicate glass microfibers, sub-micron liquid aerosols collide with the fibers, coalesce into larger droplets.
Drainage & Separation: These enlarged droplets are forced to the outer surface of the media, where they shed off and are collected in the filter housing sump for automatic or manual drainage.
Post-Filtration Layer (Optional): A fine mesh or membrane provides a final barrier, preventing any re-entrainment of captured liquids.
Key Benefits of Our Coalescing Filter Cartridges
Superior Filtration Efficiency: Achieve >99.99% removal of oil and water aerosols at 0.01 micron and solid particles at 0.3 micron, delivering ISO 8573-1:2010 Class 0 or Class 1 quality air.
Low Pressure Drop: Our optimized media design provides maximum contaminant holding capacity with minimal initial and growing pressure drop, saving energy costs.
Extended Service Life: High dirt-holding capacity means longer intervals between change-outs, reducing maintenance frequency and total cost of ownership.
Broad Compatibility: We offer a wide range of sizes and connection types (DOE, SP, GTH, etc.) as direct 100% compatible replacements for major OEM brands like Pall, Donaldson, Parker, and more.
Reliable Performance: Manufactured under strict ISO quality controls, ensuring consistent performance and preventing bypass.
Technical Specifications & Selection Guide
Parameter | Specification |
|---|
Filtration Type | Liquid/Aerosol Coalescing & Particulate Removal |
Typical Efficiency | >99.99% on 0.01 µm oil/water aerosols; >99.99% on 0.3 µm particles |
Standard Lengths | 10″, 20″, 30″, 40″, 60″ |
Connections | Double Open End (DOE), Single Open End (SOE/SP), Threaded (GTH) |
Core Material | Stainless Steel, Polycarbonate, Phenolic |
Seals/Gaskets | Buna-N, Viton, Silicone, EPDM |
Max. Operating Temp. | Up to 82°C (180°F) for standard models; higher temps available. |
Recommended ΔP | Change cartridge at 7-8 psi differential pressure. |
Not sure which cartridge you need? Use our [Filter Finder Tool] or Contact Our Technical Support for assistance.**
Applications Across Industries
Our coalescing filter cartridges are essential for protecting equipment and ensuring quality in:
Compressed Air Systems: For instrument air, painting, pneumatic tools, food & beverage processing, and pharmaceutical manufacturing.
Natural Gas Processing: At wellheads, compressor stations, CNG fueling stations, and pipeline transmission.
Aviation & Aerospace: For aviation fuel and ground support air systems.
Petrochemical & Chemical: Process gas purification, catalyst protection, and inert gas generation.
Laser Cutting & CNC Machinery: To protect optical lenses and sensitive valves from oil haze.
Frequently Asked Questions (FAQ)
Q: How often should I change my coalescing filter cartridge?
A: Change intervals depend on contaminant load and operating conditions. Monitor the differential pressure gauge on your filter housing. We recommend changing the cartridge when the ΔP reaches 7-8 psi (0.5 bar) over the initial clean pressure drop, or as per your maintenance schedule.
Q: Can your cartridges replace my current OEM brand?
A: Absolutely. We specialize in manufacturing high-quality, direct-fit replacements. Provide us with your OEM part number (e.g., Pall CCxxx, Donaldson Pxxx), and we will match the specifications exactly for a seamless swap.
Q: What’s the difference between a coalescing filter and a particulate filter?
A: A particulate filter only removes solid dust. A coalescing filter cartridge removes both solids and liquid aerosols (oil/water mist), which particulate filters cannot effectively handle. They are often used in series: a particulate filter first, followed by a coalescer.
Q: Do you offer cartridges for high-temperature applications?
A: Yes. We have specialized media and construction materials (e.g., all-metal housings, high-temp seals) for applications exceeding standard temperature ranges. Contact us with your specific requirements.
Why Choose Lefilter for Your Coalescing Filters?
Expertise: Over 18 years dedicated to filtration technology.
Quality: Rigorously tested products you can rely on.
Value: OEM-level performance without the OEM price tag.
Global Support: Fast shipping and technical advice worldwide.
