Compressed Air Coalescer: Achieving Oil-Free, Dry Air for Critical Operations
A Compressed Air Coalescer from Lefilter is the definitive purification solution for removing oil, water aerosols, and solid particulates from compressed air systems. It is the essential technology that transforms raw, contaminated compressor output into clean, dry, and safe air, protecting downstream equipment, ensuring product quality, and reducing operational costs. Designed for reliability and efficiency, Lefilter's coalescers are the trusted choice for achieving ISO 8573-1 Class 1 or Class 0 air quality across industries.
The Critical Role in Your Compressed Air System
Compressed air is often called the “fourth utility,” but without proper treatment, it carries compressor lubricants, condensed water, pipe scale, and dust. These contaminants cause:
Corrosion of pneumatic tools, cylinders, and instruments.
Fouling of process equipment and product contamination.
Increased maintenance and unplanned downtime.
A Lefilter Compressed Air Coalescer is installed downstream of the compressor and receiver, acting as the primary defense to remove liquid and aerosol contaminants beforethe air enters a dryer or point-of-use.
How It Works: Precision Coalescence and Separation
Our coalescer employs a multi-stage filtration process within a single, efficient housing:
Depth Filtration & Coalescence: Contaminated air enters the housing and flows from the outside through a high-efficiency coalescing filter cartridge. This cartridge, featuring multi-layer borosilicate microglass media, captures solid particles and forces sub-micron oil and water aerosols to collide and coalesce into large, heavy droplets.
Gravity Separation & Drainage: The enlarged droplets are carried to the inner core of the cartridge, where they are shed and fall by gravity into the housing’s sump. The separated liquids are then automatically expelled via a zero-loss electronic drain valve without wasting compressed air.
Final Barrier Filtration: The clean, dry air passes through a final integrated mesh barrier that prevents any re-entrainment of collected liquids, ensuring only pristine air exits the system.
Key Benefits of Choosing Lefilter
Guaranteed Air Purity: Consistently delivers air with <0.01 mg/m³ oil content (Class 0) and removes 99.99%+ of liquids and particles down to 0.01 micron.
Energy Efficiency: Optimized, low-pressure-drop cartridges reduce the energy burden on your compressor, saving costs.
Extended Equipment Life: Protects delicate air dryers (refrigerated/desiccant), tools, and instruments from contamination, drastically reducing maintenance.
Reliable, Maintenance-Simple Design: Robust construction with automatic drains ensures continuous operation. Cartridge changes are quick and clean.
Complete Range & Compatibility: From compact units for workshops to high-flow systems, plus direct replacement cartridges for all major OEM housings.
Technical Specifications
Parameter | Lefilter Specification |
|---|
Primary Function | Removal of Oil, Water Aerosols & Particles from Compressed Air |
Efficiency | >99.99% on 0.01 µm aerosols; meets ISO 8573-1 Class 0/1/2 |
Standard Flow Range | 5 to 5000+ SCFM |
Operating Pressure | Up to 232 PSIG (16 barg) standard |
Connections | 1/4" to 2" NPT/BSP, flanged options |
Drain | Zero-loss automatic electronic drain (standard) |
Housing Material | Aluminum or Carbon Steel (epoxy coated) |
Applications
Instrument and plant air
Food & beverage processing
Pharmaceutical manufacturing
Paint spraying & powder coating
Pneumatic controls & robotics
Laser cutting & CNC machinery
FAQ
Q: Where should I install it?
A: Directly after the air receiver and before any air dryer. This protects the dryer and ensures optimal system performance.
Q: How often to change the cartridge?
A: Replace when the differential pressure reaches 7-8 psid. Typically, this is every 4000-8000 operating hours, depending on conditions.
Q: Do you offer oil-removal only cartridges?
A: Yes. For oil-free compressors, we offer specialized Water Removal Coalescer Cartridges optimized for high moisture loads.
