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OM13 Mineral Hydraulic Oil HVI 46 - Premium ISO 46 Hydraulic Fluid

OM13 Mineral Hydraulic Oil HVI 46 - Premium ISO 46 Hydraulic Fluid

SKU:7427248193944

Regular price £28.99 GBP
Regular price Sale price £28.99 GBP
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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.

RELIABILITY: Engineered for severely stressed hydraulic systems, providing exceptional anti-wear protection and oxidation resistance in both land-based and marine environments.

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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