Shell Naturelle HF-E are advanced biodegradable hydraulic fluids for use in power transmission and hydraulic systems working in environmentally sensitive areas. Synthetic esters blended with specially tailored additive systems provide Shell Naturelle HF-E fluids with a superior balance of biodegradability, lubrication performance and compatibility with the environment.
Shell Naturelle HF-E is miscible with conventional mineral oil based hydraulic oils in all proportions. However, in order to ensure that the environmental properties and performance are maintained, the system should be drained and flushed prior to change over to Shell Naturelle HF-E.
Owing to the surface wetting properties of Shell Naturelle HF-E, if systems were previously operated using a mineral oil hydraulic fluid, deposits formed in the system during operation may be loosened and deposited in system filters. The filters should therefore be checked at regular intervals after fluid changeover.
Shell Naturelle HF-E is compatible with all seal materials and paints normally specified for use with petroleum mineral oils. Certain plastics and industrial adhesives may be adversely affected and advice should be sought from the respective manufacturers.
Shell Naturelle HF-E 46 and 68 are on the ‘Positivliste’ and qualify for funding under the German ‘Marketing Introduction Programme’ for biolubricants.
The improved anti-wear properties, and naturally high viscosity index (VI) of Shell Naturelle Fluid HF-E, means that they can often be used where ISO 11158 (HM/HV) and DIN 51524 Part 2 or Part 3 (HLP/HVLP) mineral oil hydraulic fluids are specified. However, bulk fluid operating temperatures should not be allowed to exceed 90°C and optimum fluid life will be realised if operating temperatures are maintained at approximately 55°C.
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