DISTRIBUTOR-FIRST SUPPLY PARTNER · SINCE 1999 Live · Compressed Air System
A coalescing filter is the middle stage of a compressed-air filtration train — the stage that removes liquid oil aerosol and water mist. As contaminated air passes through multi-layer borosilicate glass fiber media, fine airborne droplets collide and merge ('coalesce') into larger drops; those drops grow heavy enough to fall out of the air stream, drain down the inside of the housing, and collect in the sump for discharge through a condensate drain. The deeper the media grade, the smaller the droplet it can capture and the lower the oil carryover it leaves behind. It sits downstream of the dryer and a particulate pre-filter, and upstream of any activated-carbon vapor-removal stage.
Where coalescing earns its place in the filter train — and where it falls short. Scroll the strip →
The compressor's internal separator leaves 2-5 ppm oil carryover in the air; coalescing media takes it the rest of the way down. Regulators and particulate filters can't touch sub-micron liquid droplets.
The 0.01 micron deep-coalescing grade drops oil carryover to ~0.01 ppm — Class 1 territory. The 0.1 micron general-purpose grade gets to ~0.1 ppm (Class 2), right for typical plant and tool air.
Same collision-and-coalescing physics captures liquid water droplets after the dryer. The sump catches both oil and water; a condensate drain dumps them out together.
0.01 micron for paint, pharma, food packaging, instrumentation — anything specifying Class 1 oil. 0.1 micron for general plant air. Run both in series on critical installs: 0.1 first as a guard stage, 0.01 as the polish.
Pipe scale, rust flakes, and desiccant dust blind coalescing media in weeks. → Add upstream particulate at 5 micron — without it, the customer replaces $200 elements quarterly and blames the brand.
Glass fiber coalesces droplets; it has no mechanism for gaseous hydrocarbon. Customers specifying Class 0 total oil (liquid + vapor) need a downstream stage. → Step up to activated-carbon in series for food, pharma, breathing air, paint.
Coalescing removes oil and water — it doesn't address live bacteria. → Re-spec to medical-sterile as the final stage on NFPA 99 hospital medical-air, dental, and pharma fill lines, downstream of the full coalescing + carbon train.
From the machine spec sheet → to the part number. Answer what you know — leave the rest blank — and send.
Most distributors sell one brand per product type. SPC's 60-brand portfolio means every Product Type page surfaces three real options matched to how your customer is buying today. Pick the tier; the quote desk handles the cross-reference.
Coalescing isn't one filter — it's a position in a stack. The sale is the stack: particulate pre-filter, coalescing for oil and water mist, activated carbon for oil vapor. Selling a coalescing element by itself means the customer's air quality fails on the next audit and they think the filter didn't work.
Each industry below uses this product across the listed areas. Open an industry to see how it fits the rest of its system.
Food & Beverage Processing → 
Pharmaceutical, Medical Device & Laboratory → 
Packaging & Printing → 
Metalworking & Fabrication → Also applies to Plant main-air headers · Paint shops and coating booths · Instrument and control air · Sandblasting and abrasive-blast breathing-air supply
Every entry is a real product on this site — linked, not just named. Quote them on the same line item.
Stock two coalescing elements per main-line housing in the customer's MRO crib and one per point-of-use install — element supply-chain delay at change time is downtime on the line.
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