High Viscosity Index Hydraulic Oil L-HV (ISO VG 32 / 46 / 68)
Shear-stable multi-grade hydraulic fluid fortified with polymethacrylate (PMA) viscosity index improvers, delivering instant low-temperature pumpability without cavitation at -40°C while maintaining hydrodynamic film strength up to +100°C.
Tribological Standard Definition & Engineering Direct Answer
FOSS L-HV Wide-Temperature Hydraulic Oil is an advanced multi-grade fluid formulated from severely hydrotreated Group II and Group III base stocks blended with shear-stable polymethacrylate (PMA) viscosity index improvers. Meeting DIN 51524 Part 3 (HVLP), ISO 11158 HV, ASTM D6158 HV, and Parker Denison HF-0, it achieves a Viscosity Index exceeding 150 and an exceptionally low pour point down to -42°C (ASTM D97). This prevents pump cavitation during sub-zero startup in mining excavators, mobile cranes, and cold storage logistics equipment. Under high-temperature continuous duty (up to +95°C), the fluid resists mechanical shear (viscosity loss < 8% after 40 minutes per ASTM D5621 Sonic Shear Test), ensuring minimum volumetric leakage in axial piston pumps. Operating pressure reaches 350 bar. Packaged in UN 208L steel drums and 1,000L IBC totes for global cold-climate industrial operations.
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 | 32.4 | 46.8 | 68.2 |
| Kinematic Viscosity @ 100°C (mm²/s) | ASTM D445 | 6.6 | 8.5 | 11.2 |
| Viscosity Index (VI) | ASTM D2270 | 154 | 152 | 150 |
| Flash Point, COC (°C) | ASTM D92 | 218 | 226 | 236 |
| Pour Point (°C) | ASTM D97 | -42 | -39 | -36 |
| Sonic Shear Viscosity Loss (% @ 40°C) | ASTM D5621 | < 7.5% | < 7.2% | < 6.8% |
| Four-Ball Wear Scar (mm, 40 kgf, 1h) | ASTM D4172 | 0.40 | 0.41 | 0.42 |
| Copper Strip Corrosion (3h @ 100°C) | ASTM D130 | 1a | 1a | 1a |
Primary Industrial Applications & Equipment Compatibility
Engineered specifically for high-stress industrial machinery, minimizing friction coefficients and extending component service life.
Open-Pit Mining & Earthmoving Equipment
Ensures responsive boom and bucket hydraulics in excavators and wheel loaders operating in harsh alpine and winter environments.
Mobile Harbor & Offshore Cranes
Maintains hydraulic winch hoisting precision and prevents cold-start pump squeal in coastal and offshore marine terminals.
Automated Cold Storage Logistics
Guarantees reliable mast lifting and steering in reach trucks and automated guided vehicles (AGVs) at -30°C.
Forestry & Agricultural Harvesters
Withstands continuous high-cycle hydraulic motor loading across wide daily temperature swings from dawn to midday.
Batch Quality Control & Low-Temperature Verification
Strict five-stage quality checkpoint from raw base oil tank unloading to finished drum sealing.
Brookfield Viscometry @ -20°C
Tested per ASTM D2983 to verify maximum low-temperature pumpability below 3,000 mPa.s.
Sonic Shear Stability Testing
Subjected to 40-minute ultrasonic degradation (ASTM D5621) ensuring permanent polymer shear resistance.
Moisture Titration & Cleanliness
Karl Fischer titration ensures moisture < 50 ppm, with filtration meeting ISO 4406 17/15/12.
24-Month Retained Sample Archive
Traceable sealed 1L reference samples archived for every export production run.
Export Packaging, Palletization & Container Loadability
Available in export-grade UN 1A1 cold-rolled 208L steel drums (4 drums per pallet, 80 drums per 20GP container = 16,640 liters net). Also supplied in 1,000L composite IBC containers (18-20 totes per 20GP) and ISO flexitanks.
Frequently Asked Technical & Procurement Questions
Clarifications on viscosity grades, synthetic formulations, oil drain intervals, and container freight.
Why is L-HV required instead of L-HM for outdoor mobile machinery?
Does the viscosity index improver break down under high pressure?
What is the shelf life in unopened steel drums?
Request Direct Factory Quotation & Technical Dossier
Receive competitive FOB Xiamen / CIF port container pricing, batch Certificate of Analysis (CoA), and sample dispatch confirmation.