Anti-Wear Hydraulic Oil L-HM (ISO VG 32 / 46 / 68 / 100)
Engineered from severely hydrotreated Group II base oils with stabilized zinc dialkyldithiophosphate (ZDDP) anti-wear chemistry, delivering superior thermal oxidation resistance, rapid air release, and outstanding hydrolytic stability for heavy industrial hydraulic machinery.
Tribological Standard Definition & Engineering Direct Answer
FOSS L-HM Anti-Wear Hydraulic Oil is a precision-blended industrial fluid formulated from severely hydrotreated Group II paraffinic base stocks (saturates > 99%, sulfur < 0.03%) fortified with a thermally stabilized zinc dialkyldithiophosphate (ZDDP) anti-wear additive package. Engineered to exceed DIN 51524 Part 2 (HLP), ISO 11158 HM, Denison HF-0/HF-1/HF-2, and Eaton Vickers M-2950-S specifications, it provides high film strength with a 4-ball wear scar under 0.45 mm (ASTM D4172, 40 kgf, 75°C, 1200 rpm). The fluid features rapid demulsibility (ASTM D1401 water separation < 15 minutes at 54°C), low foaming tendency (< 25/0 ml per ASTM D892 Sequence I), and superior copper corrosion resistance (ASTM D130 rating 1a). Operating temperature ranges from -15°C to +95°C under continuous pressures up to 350 bar. Available in ISO VG 32, 46, and 68 grades in export-grade UN 208L cold-rolled steel drums and 1,000L IBC totes.
Verified 208L Steel Drum Staging & Container Loading Bay
Photographic evidence from our Quanzhou plant floor and export container stuffing bay. Every batch is blended via automated mass-flow metering, sealed with waterproof tamper-evident bungs, and labeled with full batch test certificates.
Laboratory Physical & Chemical Parameters (Typical Test Values)
Every batch blended at our Quanzhou plant is certified against international testing standards before filling into UN 208L steel drums.
| Test Parameter | Test Method | ISO VG 32 | ISO VG 46 | ISO VG 68 |
|---|---|---|---|---|
| Kinematic Viscosity @ 40°C (mm²/s) | ASTM D445 | 31.8 | 46.2 | 67.5 |
| Kinematic Viscosity @ 100°C (mm²/s) | ASTM D445 | 5.4 | 6.8 | 8.7 |
| Viscosity Index (VI) | ASTM D2270 | 104 | 102 | 101 |
| Flash Point, COC (°C) | ASTM D92 | 224 | 232 | 240 |
| Pour Point (°C) | ASTM D97 | -18 | -18 | -15 |
| Copper Strip Corrosion (3h @ 100°C) | ASTM D130 | 1a | 1a | 1a |
| Demulsibility (40-40-0 min @ 54°C) | ASTM D1401 | 10 min | 12 min | 14 min |
| Four-Ball Wear Scar (mm, 40 kgf, 1h) | ASTM D4172 | 0.41 | 0.42 | 0.43 |
Primary Industrial Applications & Pump Compatibility
Engineered specifically for high-stress industrial machinery, minimizing friction coefficients and extending component service life.
High-Pressure Vane & Piston Pumps
Prevents pump vane tip scuffing and piston ring scoring in Parker Denison, Rexroth, and Eaton Vickers axial piston pumps running up to 350 bar.
Plastics Injection Molding Machines
Maintains servo proportional valve responsiveness and prevents high-temperature varnish buildup during continuous 24/7 clamp cycles.
Metal Stamping & Forging Presses
Resists heavy mechanical shock loads and maintains hydrodynamic lubrication film thickness during peak cylinder pressurization.
CNC Machining Centers & Lathes
Supplies stable hydraulic clamping pressure and smooth tool changer actuation without sticking or filter clogging.
Batch Quality Control & Factory Certification
Strict five-stage quality checkpoint from raw base oil tank unloading to finished drum sealing.
Karl Fischer Moisture Titration
Every batch tested per ASTM D6304 to ensure water content below 50 ppm prior to drum packaging.
Particle Cleanliness Verification
Filtered to meet ISO 4406 cleanliness class 17/15/12 (NAS 1638 Grade 6/7) directly from the filling line.
ICP Elemental Additive Audit
Inductively coupled plasma spectroscopy confirms exact zinc (0.04-0.06 wt%) and phosphorus treat rates.
24-Month Retained Sample Archive
Sealed 1L retention bottles preserved with traceable batch serial numbers for every export shipment.
Export Packaging, Palletization & Container Loadability
Supplied in standard UN 1A1 cold-rolled steel 208-liter drums with internal anti-corrosion coating and dual bung seals (2" and 3/4"). Export shipments utilize fumigated solid wood pallets (4 drums per pallet, stretch-wrapped and strapped). A standard 20ft general purpose container (20GP) accommodates exactly 80 steel drums (20 pallets, 16,640 liters net / approx. 18,200 kg gross). Also supplied in UN-certified 1,000L composite IBC totes (18 to 20 totes per 20GP container) and 24,000L food-grade flexitanks.
Frequently Asked Technical & Procurement Questions
Clarifications on viscosity grades, synthetic formulations, oil drain intervals, and container freight.
What is the difference between L-HM and L-HV hydraulic oils?
Is FOSS L-HM hydraulic oil compatible with standard elastomeric seals?
Can I obtain factory Certificate of Analysis (CoA) with each delivery?
Request Direct Factory Quotation & Technical Dossier
Receive competitive FOB Xiamen / CIF port container pricing, batch Certificate of Analysis (CoA), and sample dispatch confirmation.