- Biodegradable hydraulics
ISO VG 32
Biodegradable HEES hydraulic fluid, the first Bosch-approved one
Official approval
Bosch Rexroth RE 90245 — hydraulic fluid rating list
Bosch Rexroth's list of hydraulic fluids rated for its own pumps and motors, after wear testing on axial piston pumps.
Biodegradable hydraulic fluid HEES — ISO 15380
Class HEES of ISO 15380: a biodegradable hydraulic fluid on a synthetic ester base.
OECD 301B biodegradability above 60 %
OECD test measuring carbon dioxide evolved over 28 days; above 60 % counts as "readily biodegradable".
Japanese Eco Mark environmental certification
Voluntary Japanese certification for reduced environmental impact over a product's life cycle.
| Property | Typical value | Method |
|---|---|---|
| ISO fluid type | HEES | ISO 6743-4 |
| Kinematic viscosity @-20°Cmm2/s | 1 522 | ASTM D445 |
| Kinematic viscosity @40°Cmm2/s | 33.3 | ASTM D445 |
| Kinematic viscosity @100°Cmm2/s | 6.3 | ASTM D445 |
| Viscosity index | 153 | ASTM D2270 |
| Density @15°Ckg/m3 | 915 | ASTM D4052 |
| Flash point°C | 240 | ASTM D92 |
| Colour | Clear amber | ASTM D1500 |
| Water separabilityminutes | 15 | ASTM D1401 |
| TOST lifehours minimum | 7 000 | ASTM D943 |
| Pour point°C | -58 | ASTM D97 |
| Biodegradability after 28days % minimum | 85 | OECD 301B |
| Iodine Valueg I2/100g | 7 | maximum Oleon OA-020 |

Hydraulic fluid - high performance, readily biodegradable, saturated synthetic esters. ISO 32,46,68 Shell PANOLIN S4 HLP Synth, the first Bosch approved HEES fluid, is our highest performance and industry leading biodegradable saturated ester (HEES) type synthetic hydraulic fluid. Shell PANOLIN S4 HLP Synth is formulated with special zinc-free additive technology, and high-performance fully synthetic saturated esters. Shell PANOLIN S4 HLP Synth offers increased machinery efficiency through enhanced oil life and premium wear protection. Particularly suited for use in environmentally sensitive areas and in stationary and mobile hydraulic systems including construction, earthmoving and forestry. The ISO VG 32 grade has a kinematic viscosity of 33.3 mm²/s at 40 °C and 6.3 mm²/s at 100 °C, a viscosity index of 153, a kinematic viscosity of 1 522 mm²/s at -20 °C and a pour point of -58 °C. It is approved by Bosch Rexroth (fluid rating list RE 90245).
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