Typical Physical Characteristics
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Irus Fluid |
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DU 46 |
DU 68 |
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ISO Viscosity Grade |
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ISO 3448 |
46 |
68 |
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ISO Fluid Type |
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ISO 6743-4 |
HFDU |
HFDU |
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Kinematic Viscosity mm2/s |
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at -20°C |
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ISO 3104 |
1839 |
2552 |
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at 40°C |
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ISO 3104 |
48.7 |
71.4 |
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at 100°C |
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ISO 3104 |
9.6 |
13.6 |
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Viscosity index |
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ISO 2909 |
187 |
197 |
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Acid number |
mgKOH/g |
ISO 6618 |
1.14 |
1.16 |
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Density at 20 °C |
kg/m3 |
IP 365 |
923 |
923 |
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Pour point |
°C |
ISO 3016 |
-36 |
-30 |
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Foaming characteristics |
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IP 146 |
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Sequence I Tendency/Stability at 24°C |
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ASTM D 892 |
0/0 |
0/0 |
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Sequence II Tendency/Stability at 93,5°C |
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0/0 |
0/0 |
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Sequence III Tendency/ Stability |
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after test at 93,5°C, ml at 24°C |
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0/0 |
0/0 |
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Air release at 50 oC |
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ISO 9120 |
4 |
14 |
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Load Carrying Capacity |
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ISO 14635-1 |
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FZG Gear Machine – Pass Stage |
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10 |
10 |
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Compatibility – with elastomers |
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NBR 2, CR, FPM, AU and PTFE |
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Compatible |
Compatible |
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NBR 1, EPDM and IR |
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Not Compatible |
Not Compatible |
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Flash point (COC) |
°C |
ISO 2592 |
320 |
312 |
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Fire point |
°C |
ISO 2592 |
348 |
330 |
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Auto-ignition temperature |
°C |
ASTM E 659 |
> 400 |
> 400 |
Specifications and Approvals
Irus DU meets the requirements of:
- ISO 12922 Specifications for fire-resistant hydraulic fluids – category HFDU
- The European Communities Mines Safety Commission 7th Report – Requirements for less flammable fluids (‘7th Luxembourg Report’).
Irus Fluid DU is approved by:
- Eaton for Industrial and mobile hydraulic systems according to Brochure 694 requirements.
Applications
Shell Irus Fluids DU are advanced, synthetic, anhydrous less flammable hydraulic fluids based on organic esters and proven additives. These ISO Class HFDU fluids are specially designed to provide good performance in conventional hydraulic systems and have better fire resistance than mineral oils. They are also biodegradable with a low ecotoxicity, and are particularly suited for use in environmentally sensitive areas.
- Typical applications for Irus DU are to be found in the tunnel boring, metal, mining and glass industries. Irus Fluids can replace mineral oils in hydraulic installations to provide good lubrication and a higher degree of fire resistance.
Irus DU are compatible with seal and paint materials normally specified for use with mineral oils, except those made from natural rubber. More details are given in the “Typical Physical Characteristics” table.
- Classification HFDU according to ISO 6743-4