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Polymer Rigid Composite Membrane Technology
Regenerable membrane filtration engineered for lubricant production — not adapted from disposable cartridge systems.
Rigid Membrane Structure
The Jingyuan® polymer rigid composite membrane is a sintered tubular membrane array with pore geometry fixed in a high-strength matrix (membrane wall thickness 3–5 mm). Pore dimensions remain constant across the operational pressure range — from normal working pressure drop (0.2 MPa) to the backwash trigger point (0.5 MPa). Rigid pores do not deform under cold-start shocks or pump pressure fluctuations, eliminating "extrusion bypass." Because the pore structure is sintered into the polymer matrix, loose fibers physically do not exist — zero secondary fiber contamination.
Gas-Pulse Regeneration
Membrane elements are regenerated by gas-pulse backwashing using 0.4–0.6 MPa compressed air / N₂, triggered at 0.5 MPa differential pressure. Regeneration restores filtration capacity in place — no cartridge swap-out, no media inventory, no used-cartridge disposal. The JY-DX40-L runs consumable-free.
Zero Disposable Cartridges
No string-wound, melt-blown PP or pleated paper elements are used anywhere in the system. One membrane precision specification covers all product lines within the same viscosity range — streamlining line management and eliminating SKU-heavy cartridge inventories.
ISO 16889 β-Ratio Testing
Filtration performance is quantified by the ISO 16889 multi-pass test. β10 ≥ 200 means that for every 200 particles ≥ 10 µm upstream, only 1 remains downstream — 99.5% absolute retention. Quantifiable test reports support OEM audits and outgoing-batch cleanliness commitments.
Why 5–10 µm — Blocking Abrasives While Protecting Formulas
Lubricant filtration has a specific contradiction: harmful abrasive particles must be intercepted, while the design target is to avoid stripping additive molecules from the formulation.
| Component in Oil | Typical Size | Filtration Intent |
|---|---|---|
| Detergent-dispersant micelles | 0.01–1 µm | Must pass through |
| Long-chain viscosity index improvers (VII) | ~2–5 µm hydrodynamic diameter | Must pass through |
| Hard abrasive particles (metal shavings, oxide scale, dust) | ≥ 5 µm | Must be intercepted |
Media with pores that are too small (1–3 µm) inevitably intercept VII and other critical additives, causing formula drift and viscosity index degradation. The Jingyuan® membrane restricts its pore size to a precise 5–10 µm window with β10 ≥ 200 absolute retention — intercepting harmful abrasives. The design objective is to minimize additive-molecule removal; actual additive retention for a given formulation is confirmed by Jingyuan per application, not assumed from pore size alone.
Intrinsic Superhydrophobic Water Removal
The membrane surface is treated to be intrinsically superhydrophobic — repelling free and mildly emulsified water from the oil.
Interfacial Tension Barrier
Water droplets are repelled and blocked by the membrane surface due to contact-angle differences, preventing penetration to the clean-oil side.
Coalescence & Settling
Blocked droplets coalesce into larger drops in low-velocity zones and settle into the water collection chamber.
Routine Drainage
Accumulated water is removed via the bottom drain valve — no chemical demulsifiers required, no separate vacuum dehydration module needed.