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Shell Irus Fluid C is an advanced water-glycol fire resistant hydraulic fluid containing powerful additives to enhance its anti-wear, anti-corrosion and... 


Shell Irus Fluid C is an advanced water-glycol fire resistant hydraulic fluid containing powerful additives to enhance its anti-wear, anti-corrosion and anti-oxidation properties. The water content is approximately 40% by weight.

Performance, Features and Benefits: 

•    Fire resistant for high risk installations 

As demonstrated in the 7th Luxembourg Report fire resistance tests the product contributes significantly in reducing the fire risk both in presence of flames and hot surfaces. 

•    Excellent components and fluid duration 

This guarantees reliable operation especially compared with fluids of older technologies. 

•    Improved wear performances against minimum industry standard 

As demonstrated in the vane pump testing required by the 7th Lux. Report the product offers significantly better antiwear performances than the minimum required by the standard. 
•Fluid life 

The life of Irus C is comparable to mineral oils in properly maintained systems. The exact life has to be determined by Fluid Condition Monitoring, please consult your Shell Representative for further advice. 

•Control of water content 

Water content should be controlled within 35% to 45% by weight. Condensate or de-ionized water should be used for any additions, which should be made slowly whilst the fluid is circulating. Even better is to top up an amount of fresh fluid to bring the water content back within the limits. 

An approximate check of the water content can be made from the viscosity of the fluid or its density. Accurate determination of the water content can be made in a laboratory with the Karl Fisher method. 

•Lubrication and component life 

In general, water-glycol fluids are less effective bearing lubricants than petroleum mineral hydraulic oils, but are entirely satisfactory in systems containing pumps with plain bearings or lightly loaded ball and roller bearings designed to operate with water glycol fluids. However, in common with other water-based fluids a reduction in bearing life can be expected. This will normally be included in the 'derating' made by the pump manufacturer. 

In order to increase the reliability of the system and reduce its maintenance costs it is important that all components are checked with their manufacturer to ascertain whether they are suitable/compatible with water glycol products. 

•Conversion from other type of fluids 

Specific attention should be given when converting to Irus C systems that were previously using lubricants of different types than ISO HFC (eg. mineral oils or ISO HFDU type of products). In such a case it is suggested you seek advice from your Shell Representative about the change over procedure you should follow. 


•Irus Fluid C is particularly suitable for demanding hydraulic applications where there is a high fire risk, such as those found in the Metal and Mining industries. 

•In order to reduce water evaporation, Irus C (as for all ISO HFC type fluids), should not be used above 65 0C. The recommended maximum operating temperature is 50 0C. To maintain fire-resistance it is important to monitor the water content of the fluid and replenish if necessary when operating at elevated bulk fluid temperatures. 

ISO Visocity Grade
Transparent red
Kinematic Viscosity cSt @ 40°
Pour Point, °C
Density @ 15 °C kg/m3
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