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Fuel Cleanliness Protection
Removing water and particles from diesel fuel to protect high-pressure common rail injectors. Water above 200 ppm causes injector stiction and micro-pitting.
FAILURE MECHANISM
Water above 200 ppm in HPCR fuel → corrosion of injector needle and valve seat → micro-pitting → stiction → increased injection timing variability → rough running → injector replacement. Hard particles >4 µm → abrasive wear of injector needle and orifice → spray pattern distortion → combustion degradation → power loss.
1–3 µm needle/seat
HPCR injector clearance
<200 ppm
Water limit for HPCR
ISO 12/10/8
Particle target
$800–$2,500 per injector
Injector service cost
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Contamination Target
Water (<200 ppm for HPCR protection), hard particles (ISO 12/10/8 cleanliness for HPCR injectors at 2,000+ bar injection pressure).
TARGET CLEANLINESS
ISO 12/10/8 particle cleanliness; <200 ppm water content (ISO 12937 / ASTM D6304).
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HPCR Injector Sensitivity
High-pressure common rail (HPCR) fuel systems operate at injection pressures from 1,600 to 2,500 bar. Injector needle-to-seat clearances are 1–3 µm — smaller than many fuel contaminant particles. At these clearances, even sub-5 µm particles cause abrasive wear and dimensional change. Water above 200 ppm in fuel causes corrosion of precision-ground injector surfaces and promotes microbial growth in fuel storage.
1,600–2,500 bar
Injection pressure
1–3 µm
Needle clearance
>200 ppm
Water damage threshold
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Two-Stage Protection Strategy
Fuel protection requires two complementary technologies: SYNTEPORE™ for particle removal (β₄(c) ≥200) and HYDROCORE™ for free water removal (≥96%). The pre-filter/coarse separator (HYDROCORE™) is installed upstream to remove bulk water and coarse particles. The final element (SYNTEPORE™) provides fine particle protection at the injection pump inlet. This sequence protects both the lift pump (10–15 µm clearances) and the high-pressure pump and injectors (1–3 µm clearances).
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Water Contamination Pathways
Water enters diesel fuel through atmospheric breathing of storage tanks (condensation), transport container contamination, fuel depot cross-contamination, and worn fill-point seals. Coastal marine environments and high-humidity climates accelerate tank condensation. Microbial growth (Hormoconis resinae, Pseudomonas aeruginosa) occurs at the water/fuel interface above 60–70°F and can block filters within 72 hours.
ELIMFILTERS TECHNOLOGIES FOR THIS SYSTEM
SYNTEPORE™
Nanofiber fuel filtration for high-pressure common rail injector protection.
HYDROCORE™
Coalescing fuel water separator for free water removal from diesel fuel.
TURBOCORE™
Three-stage heavy-duty fuel filter/water separator for full-spectrum diesel contamination control.
DURATECH™
Consolidated filter kits for heavy-duty fleet maintenance covering all filtration systems in a single service kit.
MARINECLEAN™
Consolidated filtration system for maritime vessels covering all on-board filtration circuits in high-salinity environments.