Suppliers of FIRE-RESISTANT HYDRAULIC FLUIDS Sinopec HFC 4631 Water–glycol Fire-resistant Hydraulic Fluid is formulated with a blend of water, ethylene or diethylene glycol, selected additives and high viscosity polyglycol thickeners to meet the ISO 6743/4 HFC classification for fire-resistant hydraulic oils of the water–glycol type.

It is designed for use in high pressure hydraulic systems where the requirements for fi re resistance, pump wear protection and viscosity are met by water–glycol fluids. • Coke furnace door openers. • Basic oxygen furnace hydraulics. • Electric welders. • Moulding and metal die-casting machinery. • Welding machines. • Furnace charging equipment. • Continuous metal casting equipment. • Glass drawing machinery. • Mobile equipment operating in areas of high fi re risk.

Caution: Sinopec HFC 4631 Water–glycol Fire-resistant Hydraulic Fluid is not compatible with conventional mineral oil based hydraulic fluids or ISO 6743/4 HFDU type fi re-resistant hydraulic fluids.

Note: Also that water–glycol fluids are not compatible with all seal materials or paints, and that care must be taken to ensure the hydraulic system is designed or adapted for use with such fluids. Compatible seal materials include: nitrile, PTFE, Neoprene (chloroprene), silicone, Viton®, nylon, natural rubber and butyl rubber. Compatible paints include vinyl and epoxy resin based products. SPECIFICATION AND APPROVAL ISO 12922 HFC GB1 21449 1


Outstanding fi re-resistant properties providing safer working conditions for people and plant. Excellent rust and corrosion prevention properties, in both the liquid and the vapour phase, protect the hydraulic system from rust and corrosion and avoid rust debris contamination that can damage components. Excellent lubricity and anti-wear properties protect components against wear, extend pump and valve life and reduce maintenance costs. Very low pour point (<–50°C) ensures good cold-start performance. Very high viscosity index provides excellent viscosity temperature performance and provides optimum protection over a wide operating temperature range. Excellent stability during storage reduces inventory costs. Long fl uid service life (up to 10,000 hours) can be achieved when equipment is properly maintained. The fl uid has low toxicity and is readily biodegradable, so is safer for the environment and the operator. RECOMMENDED APPLICATIONS

• Hydraulic equipment (vane, gear or piston type pumps) where an ISO 6743/4 HFC type fi re-resistant hydraulic fluid is required.

• Hydraulic systems operating in areas where there is a high risk of fi re (e.g. steel mills, coal mines, the chemical industry), at operating temperatures between –30°C and 60°C and at continuous operating pressures of up to 20 MPa.