Machinery cutting metal

Shell Fire-Resistant Hydraulic Fluid S3 DU

Worker pouring liquid metal

Lubricants

Improve safety with inherent fire resistance

Drive equipment performance while minimising the risk of fire and maintaining the safety of your people in industrial and mobile operations.

In industrial and mobile operations that expose equipment to extreme temperatures, it is essential to minimise the risk of fire and maintain the safety of your people.

In settings that expose your equipment to extreme temperatures, it is essential to prevent the risk of fire while improving system efficiency. That is why fire-resistant hydraulic fluids that optimise productivity and extend maintenance intervals are vital.

As a fully synthetic formulation, Shell Fire-Resistant Hydraulic Fluid S3 DU delivers performance that is superior to premium anti-wear mineral oils and offers significant performance and environmental advantages over other fluid options, including other synthetics.

Performance Advantages

Worker at a furnace pouring melted metal

Deliver peak performance in extreme conditions

Operating in severe conditions presents your hydraulic systems with additional performance challenges, meaning the lubricants you use need to provide optimum protection at wide temperature ranges.

From protection against cavitation in cold start-ups to extra durability in extreme heat, Shell Fire-Resistant Hydraulic Fluid S3 DU helps keep your hydraulic systems operating productively under these conditions.

  • Inherently fire-resistant, Shell Fire-Resistant Hydraulic Fluid S3 DU improves the safety of your operations with a high flash point, high fire point and a high auto-ignition temperature to minimise the risk of fire.
  • Shell Fire-Resistant Hydraulic Fluid S3 DU provides outstanding pump life under severe conditions – delivering excellent shear stability and high levels of protection against wear and scuffing.
  • Combining high viscosity with excellent low-temperature fluidity, Shell Fire-Resistant Hydraulic Fluid S3 DU provides year-round protection for your equipment – keeping it running smoothly.

Environmental Advantages

Old mine in coastal setting

Protect your equipment and the environment

When operating in environmentally sensitive settings, you need to know that your hydraulic fluids are not only able to protect your equipment but also help you to mitigate any impact on local ecosystems.

Shell Fire-Resistant Hydraulic Fluid S3 DU is engineered to work in a wide range of settings and has been designed to help you meet your environmental responsibilities.

  • Designed to be readily biodegradable, Shell Fire-Resistant Hydraulic Fluid S3 DU with ISO viscosity grades 46 and 68 give you greater peace of mind across applications in environmentally sensitive areas.
  • Shell Fire-Resistant Hydraulic Fluid S3 DU is recognised by FM Global as an inherently fire-resistant industrial fluid, suitable for high-pressure systems where fire hazards are a concern.
  • Shell Fire-Resistant Hydraulic Fluid S3 DU 46 has a biodegradability of more than 60% after 28 days in the OECD 301 B carbon dioxide evolution test.

Service Life Advantages

Liquid metal furnace using water

Lower operating costs with longer service life

Hydraulic systems operating in severe conditions often require shorter maintenance intervals. Fluid degradation reduces the service life of lubricants and forces you to replace them more often.

Shell Fire-Resistant Hydraulic Fluid S3 DU is engineered to minimise fluid degradation and extend fluid changeout intervals – even under the most extreme conditions.

  • Shell Fire-Resistant Hydraulic Fluid S3 DU helps to extend the life of equipment and requires less frequent changeouts than mineral oil-based fluids. In many cases, this fluid can be used four times longer than non-synthetic fluids.
  • Shell Fire-Resistant Hydraulic Fluid S3 DU is developed to provide high resistance against sludge and varnish, keeping your hydraulic system cleaner for longer and reducing the need for maintenance.
  • Unlike phosphate esters, polyol esters and vegetable oils, Shell Fire-Resistant Hydraulic Fluid S3 DU will not react with water, thereby minimising the fluid degradation and acid formation that can damage and eventually destroy hydraulic pumps.

This lowers your consumption and helps to reduce your operating costs in comparison to mineral oil-based fluids.

Shell Fire-Resistant Hydraulic Fluid S3 DU specifications

Properties
Method ISO 46 ISO 68 ISO 100
ISO viscosity grade ISO 3448 46 68 100
Kinematic viscosity at 40°C, mm 2/5 ISO 3104/ASTM D445 50.0 68.0 100.0
Kinematic viscosity at 100°C, mm 2/5 ISO 3104/ ASTM D445 9.5 12.3 17.0
Viscosity index ISO 2909/ ASTM D2270 178 181 189
Density at Kinematic viscosity at 15°C, g/cm³ ASTM D1298 0.992 0.993 0.993
Flash point (Cleveland open cup), °C ISO 2592/ ASTM D92 279 281 281
Fire point (Cleveland open cup), °C ISO 2592/ ASTM D92 315 319 319
Autoignition temperature, °C ASTM E659 388 394 -
Air release at 50°C, min ASTM D3427 3 5.5 -
Air release at 75°C, min ASTM D3427 - - 4.0
Pour point, °C ISO 3016/ASTM D97 -45 -42 -39
FZG scuffing (A/8.3/90), failure load stage ISO 14635-1 13 13 13

Download the product sheet

Discover more about how Shell Fire-Resistant Hydraulic Fluid S3 DU can drive equipment performance, extend maintenance intervals and improve fire resistance.

Discover more

Delivering value across the industrial space

Download our white paper to find out more about how fire-resistant hydraulic fluids can bring value to your operations – driving performance, extending service life and helping you to meet your environmental responsibilities.

Discover more

Related content

Shell Turbo S5 DR

A high-performance phosphate ester (HFDR) self-extinguishing fire-resistant fluid, Shell Turbo S5 DR features a high flash point, high fire point and high auto ignition temperature. It can be used as the hydraulic fluid in electrohydraulic governor controls (EHC) systems in steam and gas turbines.

Shell Fire-Resistant Hydraulic Fluid S2 DU

Enhance the protection of industrial equipment in steel mills, mines and foundries with readily biodegradable¹ anhydrous fluid based on synthetic organic esters. Shell Fire-Resistant S2 DU is FM Approved, USDA Bio-preferred certified and MSHA (68) approved.

Shell Fire-Resistant Hydraulic Fluid S1 DU

Reduce the risk of fire with Shell Fire-Resistant S1 DU, formulated by blending natural esters with polyalkylene glycol (PAG). Shell Fire-Resistant S1 DU is readily biodegradable1, FM approved and USDA Bio-preferred certified.

Shell Water-Glycol S2 CX 46

Water-glycol (HFC) fire-resistant hydraulic fluid, designed for hydraulic systems that operate at pressures of up to 4,000 psi with a fire-resistant hydraulic fluid that offers high-level protection against corrosion and pump wear.