product brief introduction
Replacement Coalescer Filter. A coalescing filter element is a specialized filtration component designed to remove fine liquid droplets (such as water, oil, or other immiscible liquids) from a gas or fuel stream. It works by forcing the contaminated fluid through a multi-layered matrix of microfibers, where small droplets collide, merge (coalesce), and grow into larger droplets. These larger droplets then shed from the fiber surface due to gravity or fluid flow and are collected in a sump or drained away. Common applications include compressed air systems, fuel polishing, natural gas processing, and hydraulic oil purification. The element typically features high filtration efficiency, low pressure drop, and long service life. Replacement coalescer filter.
Replacement Coalescer Filter.Constructed with specially surface-treated glass fiber or polyester fiber as the coalescing medium, the filter element features a high-density gradient or a multi-layer composite structure . As the fluid flows from the inside to the outside through the cartridge, sub-micron droplets are captured by the ultra-fine fibers through the combined mechanisms of inertial impaction, diffusion interception, and direct interception .
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Product Parameter
Replacement Coalescer Filter
| Parameter Category | Parameter Item | Technical Value / Range | Remarks |
|---|---|---|---|
| Basic Specifications | Nominal Diameter | 50 mm ~ 300 mm (customizable) | Common sizes: 50, 100, 150, 300 mm |
| Nominal Length | 300 mm ~ 2000 mm (customizable) | Common lengths: 500, 1000, 1500, 2000 mm | |
| Connection Type | Thread / Flange / Ferrule | Designed per housing interface | |
| Core Material | SS 304 / 316 / 316L / Carbon steel (zinc-plated) | 316L recommended for highly corrosive services | |
| Filtration Performance | Filtration Rating | 0.1 μm ~ 10 μm (selectable) | Common ratings: 0.1, 0.3, 1, 3, 5, 10 μm |
| Coalescing Efficiency | ≥ 99.5% (for droplets > 0.3 μm) | Effluent free water content can be < 10 ppm | |
| Initial Pressure Drop | ≤ 0.02 MPa (with clean element) | Measured at rated flow with clean media | |
| Max. Allowable Pressure Drop | 0.15 MPa (recommended change-out point) | Immediate replacement recommended beyond this value | |
| Material Composition | Filter Media Layer | Glass fiber / Polyester fiber / Polypropylene | Glass fiber standard; polypropylene for chemical-resistant services |
| End Cap Material | Epoxy resin / Stainless steel / Nylon | Selected per pressure rating | |
| Seal Material | NBR / FKM / EPDM | Material compatibility must be verified |
Replacement Coalescer Filter
Key Features
High Precision and Coalescing Efficiency: Utilizing gradient-density glass fiber or a composite polyester fiber structure, the filtration rating can reach as high as 0.1 microns, with free water content in the effluent as low as 10 ppm, meeting international API standards .
Material Compatibility and Structural Integrity: The filter media features hydrophobic and oleophobic treatment, ensuring excellent chemical compatibility with various fluids, including aviation fuels, hydraulic oils, and LPG . The monolithic or spirally wound construction guarantees media integrity, preventing fiber shedding and downstream contamination .
High Dirt-Holding Capacity and Long Service Life: The depth-type filtration structure provides a large surface area and high dirt-holding capacity, significantly extending the cartridge's operational life .
Low Pressure Drop Design: The optimized flow path ensures a low initial pressure drop, effectively reducing operational energy consumption .
Application Fields
Coalescing filter cartridges are widely utilized across industries requiring precise removal of water and particulates :
Aviation Fuel and Petrochemicals: Dehydration and purification of jet fuel, gasoline, and diesel; removal of condensate from hydrocarbons, LPG, and natural gas pipelines in refineries and petrochemical plants .
Power Generation and Industrial Lubrication: Oil-water separation and purification of turbine oils, hydraulic fluids, and lubricating oils .
Gas Processing: High-efficiency removal of entrained droplets and oil aerosols from compressed air, instrument air, fuel gas, and coal-bed methane, protecting downstream dryers, adsorption towers, and sensitive pneumatic instruments .
company profile
Xinxiang Jun Filters and Chemical Co.,Ltd.is a professional manufacturer engaged in the design and production of filters,filtration equipment, purification devices, and oil-water separation devices.The company has gathered a large number of professional, senior engineers and other technological elites, specializing in design research and development manufacturing.
The R&D team is strong, with a high level of professional technology and rich practical experience. The company has advanced production equipment and a complete quality and safety assurance system.
FAQ
Q1: How do I determine the right filtration rating for my application?
The selection of filtration rating depends on the droplet size to be removed and the downstream water content requirement. For aviation fuels and light hydrocarbons, a rating of 0.1–3 μm is recommended for deep dehydration; for lubricating oils or heavier stocks, 3–5 μm is generally sufficient. We can provide customized recommendations based on your media type, operating temperature, flow rate, and target water content.
Q2: How can I tell when the cartridge needs replacement?
Replacement is primarily determined by the operating differential pressure, rather than by time alone. When the pressure drop rises to 0.15 MPa (approx. 15 psi), the cartridge is severely clogged and must be replaced. Additionally, if the effluent free water content consistently exceeds the process limit, replacement is advised even if the pressure drop is still below the threshold. We recommend keeping regular records of initial and operating pressure drops for optimal maintenance scheduling.
Q3: Is the cartridge suitable for media containing surfactants?
Special attention is required: the coalescing performance is significantly inhibited in media with high surfactant content (e.g., emulsifiers or additives). Surfactants reduce the oil-water interfacial tension, preventing small droplets from coalescing into larger ones. If your media contains such components, we recommend upstream pretreatment (e.g., demulsifier injection or heating/settling) or selecting our specially designed anti-emulsification enhanced cartridge.
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