- Biodegradable hydraulics
ISO VG 32
Zinc-free biodegradable hydraulic fluid for marine and deck equipment
Biodegradable hydraulic fluid HEES — ISO 15380
Class HEES of ISO 15380: a biodegradable hydraulic fluid on a synthetic ester base.
The European Union's voluntary ecolabel for products, including lubricants, with reduced environmental impact across their life cycle.
OECD 301B biodegradability above 60 %
OECD test measuring carbon dioxide evolved over 28 days; above 60 % counts as "readily biodegradable".
SS 15 54 34 — environmental requirements for hydraulic fluids (Sweden)
Swedish standard: high biodegradability, low aquatic toxicity, finished fluid not classified as environmentally hazardous; required near groundwater and drinking water sources.
| Property | Typical value | Method |
|---|---|---|
| Fluid type (ISO classification) | HEES | ISO 6743-4 |
| Kinematic viscosity @-20°Cmm2/s | 1 231 | ASTM D445 |
| Kinematic viscosity @40°Cmm2/s | 33.30 | ASTM D445 |
| Kinematic viscosity @100°Cmm2/s | 6.50 | ASTM D445 |
| Viscosity index | 164 | ASTM D2270 |
| Densitykg/m3 | 917 | |
| Flash point°C | 253 | ASTM D92 |
| Colour (ASTM) | 1.0 | ASTM D130 |
| Water separation @54°Cminute | 15 | ASTM D1401 |
| Pour point°C | -54 | ASTM D97 |
| Biodegradability after 28zile % minim | 60 | OECD 301B |

Hydraulic fluid – high-performance, readily biodegradable saturated synthetic esters. Shell PANOLIN S4 HLP Synth EAL is formulated with zinc-free additive technology and high-performance fully synthetic saturated esters to deliver a remarkable blend of lubrication performance and environmental acceptability. Readily biodegradable with low ecotoxicity, Shell PANOLIN S4 HLP Synth EAL hydraulic fluids are particularly suitable for use in environmentally sensitive areas where eco-label compliance is required, including US waters. For use in stationary and mobile hydraulic systems, including marine and deck equipment, construction and forestry. This grade is ISO VG 32: kinematic viscosity 33.3 mm²/s at 40 °C, 6.5 mm²/s at 100 °C and 1,231 mm²/s at -20 °C, viscosity index 164, flash point 253 °C, pour point -54 °C.
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