Technical reference for ISO VG 46 hydraulic oil covering operating conditions, typical applications and specification requirements.
Operating context
ISO VG 46 hydraulic oil is a medium viscosity hydraulic fluid used in a wide range of industrial and mobile hydraulic systems. It is commonly selected where operating temperatures are moderate to high and where systems operate under sustained load.
The viscosity grade is defined by ISO 3448 and corresponds to a nominal kinematic viscosity of 46 mm²/s at 40°C.
Typical equipment use
This viscosity grade is widely used in hydraulic systems designed for general industrial duty and heavier mobile applications.
- Industrial hydraulic power units
- Presses and forming equipment
- Injection moulding and production machinery
- Mobile plant operating at moderate temperatures
- Hydraulic systems within waste and recycling facilities
Viscosity behaviour in service
ISO VG 46 provides a balance between fluid flow and load carrying capability. It supports stable lubrication films under load while maintaining acceptable system response across normal operating temperatures.
In colder environments or during cold starts, higher viscosity may increase pump inlet resistance. In such cases, equipment manufacturer guidance should be followed to confirm suitability.
Specification requirements
ISO VG 46 hydraulic oils are formulated to meet recognised performance standards. The required specification depends on system design, pressure levels and temperature variation.
- ISO 11158 HM for standard anti wear hydraulic systems
- DIN 51524 Part 2 HLP for mineral based anti wear systems
- ISO 11158 HV where viscosity stability over temperature is required
- DIN 51524 Part 3 HVLP for systems exposed to temperature variation
Operating environment considerations
ISO VG 46 is commonly used in continuous operation industrial systems and in mobile plant where ambient temperatures remain moderate. In demanding environments such as waste processing, contamination control and specification discipline are critical to maintaining system reliability.
Where multiple hydraulic oil grades are present on site, clear identification of ISO VG 46 systems reduces the likelihood of incorrect oil use.
Compatibility and grade control
ISO VG 46 should only be substituted with another viscosity grade where permitted by the equipment manufacturer. Using lower viscosity oils may reduce load carrying capability, while higher viscosity oils may affect system response.
When changing oil type or supplier, compatibility with seals and residual oil should be confirmed.
Product availability
Sinopec Online supplies ISO VG 46 hydraulic oils formulated to recognised international standards for industrial and mobile hydraulic systems.
All Sinopec lubricants supplied by Sinopec Online are genuine, factory-sealed products backed by technical support.
Technical support
For product selection support, contact Sinopec Online or call +44 020 8068 3444.