If you spend time around fuel polishing rigs or fleet maintenance shops, you hear the same thing: water is the quiet saboteur. That’s why Oil-water Separation Filter Paper has gone from niche to necessity. The unit I looked at most recently—Laminated Filter Paper Fuel and Water Separation, produced in Second Buliding and Studying No21 shiji street, Handan, Hebei China—uses a layered stack (phenolic paper + melt-blown PBT non-woven laminates) aimed at diesel fuel fine filtration and, crucially, coalescing/separation of water. To be honest, the uptick in biodiesel blends makes this more relevant than ever.
ULSD, tighter OEM injector tolerances, and cold-flow challenges, actually. Many customers say they see recurring codes tied to water-in-fuel sensors after rainy weeks. It seems that robust coalescer media is now a baseline feature for fleet fuel systems, marine bunkering, and standby gensets.
| Construction | Laminated phenolic-impregnated cellulose + melt-blown PBT non-woven |
| Basis weight | ≈120–200 g/m² (real-world use may vary) |
| Thickness | ≈0.5–1.2 mm |
| Mean flow pore size | ≈8–20 µm (media level) |
| Water separation (SAE J1488) | ≈95–99% free water removal in diesel, depending on fuel chemistry |
| Burst strength | ≈150–300 kPa (media test) |
| Temperature range | -20 to 120 °C (fuel duty) |
| Recommended service life | Up to 6–12 months or ΔP limit; water load dependent |
| Roll width / customization | Up to ≈1000 mm; custom caliper, resin level, and pleatability available |
Use Oil-water Separation Filter Paper upstream of injectors (or as the coalescer in a duplex housing). Advantages include fast water drop growth, stable pleat geometry, and consistent ΔP. Surprisingly, performance swings with fuel surfactants; always validate on your actual diesel blend.
| Vendor | Media construction | SAE J1488 eff. (≈) | Customization | Lead time |
|---|---|---|---|---|
| Filtersmaterial (Handan, China) | Phenolic + melt-blown PBT laminate | 95–99% | Width, caliper, resin level | ≈2–4 weeks |
| Parker Hannifin (media) | Proprietary coalescer stacks | 95–99% | Application-specific | Varies |
| Ahlstrom-Munksjö | Cellulose/synthetic composites | ≈90–99% | Broad portfolio | Varies |
Tip: ask for a J1488 test curve on your actual fuel (with/without FAME and additive pack).
Bottom line: if diesel reliability matters, Oil-water Separation Filter Paper is not just a spec line—it’s cheap insurance against downtime.
