OM13 Mineral Hydraulic Oil HVI 46 - Premium ISO 46 Hydraulic Fluid
OM13 Mineral Hydraulic Oil HVI 46 - Premium ISO 46 Hydraulic Fluid
SKU:7427248193944
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OM-33 MINERAL HYDRAULIC OIL HVI 32
MIL-SPEC DEF STAN 91-111 & NATO H-544 Approved Grade
This OM-33 Mineral Hydraulic Oil is a premium High Viscosity Index (HVI) fluid specifically engineered to meet the rigorous requirements of the UK Ministry of Defence standard DEF STAN 91-111. It is formulated using high-quality virgin base oils and a sophisticated additive package to ensure consistent hydraulic response across a massive temperature gradient.
Key Features
- ✔ High Viscosity Index: Maintains thickness under heat
- ✔ Extreme Low-Temp Fluidity: Reliable cold starts
- ✔ Ashless Anti-Wear: Protects vanes and pistons
- ✔ Corrosion Protection: Military-grade inhibitors
- ✔ Superclean Filterability: Ultra-fine system safe
Technical Specs
| ISO Grade | 32 |
| Viscosity @ 40°C | 32 cSt |
| Viscosity Index | 155 (Typical) |
| Pour Point | -39°C |
| Flash Point | >190°C |
| Density @ 15°C | 0.870 g/ml |
Compatibility / Fitment Guide
| Sector/System | Application | Notes |
|---|---|---|
| Naval / Marine | HM Ships & Naval Vessels | Bridge mechanisms & steering gear |
| Land Vehicles | Fighting Vehicles & Armoured Transport | Main hydraulic circuits |
| Instruments | Fire Control & Gunnery Equipment | Precision servo mechanisms |
| Industrial | Cold Climate Earthmoving | High Viscosity Index requirement |
Specification & Cross Reference
| Joint Service Designation | OM-33 |
| Defence Standard (UK) | DEF STAN 91-111 (formerly 91-44) |
| NATO Code | H-544 |
| International Standards | ISO 6743 HV / DIN 51524 Part 3 (HVLP) |
| US Military Equivalent | MIL-PRF-46170 (Related Spec) |
Questions & Answers
Is this oil compatible with standard hydraulic systems?
Yes, it is compatible with most mineral-based systems using ISO VG 32. However, it is specifically designed for systems requiring "High Viscosity Index" (HV/HVLP) performance for extreme temperature variations.
What is the advantage of a High Viscosity Index (HVI)?
Standard oils thin out rapidly as they heat up. HVI oils like OM-33 stay thicker at high temperatures and more fluid at low temperatures, ensuring consistent pressure and protection across all operating conditions.
Can I use this as a preservative oil?
Yes, OM-33 contains specific corrosion inhibitors that allow it to act as a preservative for hydraulic components during storage or while the system is inactive.
Note: Please verify your equipment requirements against the DEF STAN 91-111 specification before purchase. For technical support, visit 4drive.co.uk.
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