1. KWANGWOO CO., LTD R&D CENTER 11 FIRE RETARDENT HYDRAULIC OIL Aug. 30. 2013

2. KWANGWOO CO., LTD R&D CENTER 22 Hydraulic oil is a suitable solution for hydraulic equipment and used for tool machines, press machines, aircraft, construction equipment, automobiles, and so on. Hydraulic oil plays important role throughout industry. It functions in power transmission, parts lubrication, prevention of rust and corrosion in hydraulic system, and the extension of machine and tool life by cooling the system. The important qualities for hydraulic oil. - Suitable viscosity. - Low pour point, so working is possible even in low temperature. - High viscosity index minimizes viscosity change according to operational temperature. - Excellent non-wear of operational parts. - Excellent anti-foaming agency to prevents cavitation in operation. - Excellent demulsification ability to make possible to separate water and oil. - Excellent prevention of rust and corrosion. Introduction What is the Hydraulic oil ?

3. KWANGWOO CO., LTD R&D CENTER 33 Under normal conditions, the viscosity change should not be large; the control standard is ± 10%. If viscosity change is over the figure, it is considered mixture of other oil and oxidation and an oil refill might be necessary. Moisture The ordinary control standard of moisture is less than 1000ppm. (Exception: F/E system -2000ppm, W/G system- 40±5% ) If moisture is around the control standard, it is necessary to drain and refill the oil Kinematic viscosity The controls of hydraulic oil Total acid value If acid value is 0.5mg KOH/g over the original oil when the total acid value is measured, It is oxidated and it may be necessary to have an oil refill.

4. KWANGWOO CO., LTD R&D CENTER 44 (Mineral based) ISO-L-H (Fire resistant) ISO-L-HF With water A : O/W Emulsion B : W/O Emulsion C : Water-Glycol (WG series) DR : Phosphate DS : Chlorinate DU : Polyol Ester (FE series) L : R&O type (rust & oxidation inhibitor) M : AW type (anti-wear inhibitor) R : High viscosity Index type (viscosity index improver) V : M + R type Sort of Hydraulic oil(ISO) No water

5. KWANGWOO CO., LTD R&D CENTER 55 ECO POWER-Series was developed for severe service in all hydraulic applications where a fire hazard exists and petroleum hydraulic oil would be potentially unsafe. It’s excellent stability enable itself to prolong fire-resistant properties and resistance to the formation of sludge or deposits in prolonged service. Product list (FE, Eco Power Series) ECO POWER-Series (ISO L-HFDU) (Polyol ester based Biodegradability Fire-resistant Hydraulic Fluid) Fire resistant Hydraulic fluids EcoPowerEcoPowerEcoPowerEcoPowerEcoPower 32 FE-46FE-56FE-56RFE-68 Specific Gravity(15/4 ℃ ) 0.910.920.920.920.92 Viscosity(40 ℃,cSt) 32.046.056.056.068.0 Viscosity Index 180178180180176 Pour point ( ℃ ) -35-25-25-25-25 Pollution level (NAS 1638) 77777 Color Yellow transparent Yellowish Brown Red

6. KWANGWOO CO., LTD R&D CENTER 66 Special Feature (HYDRO FE-SERIES) 1.FIRE-RESISTANCE HYDRO FE-SERIES is not only un-combustible but also do not ignite respectively burn in most cases, where a conventional petroleum hydraulic oil will do. 2. VISCOSITY PROPERTIES High V.I (Viscosity Index) enable this hydraulic fluid to accommodate wide temperature fluctuations. 3. ANTI WEAR PROPERTIES Excellent Lubricity enable to apply for severe condition (like vane-pump), and to maintain crucial tolerances characteristic of advanced hydraulic system. This fluid provides dependable industrial hydraulic service in areas of and use where operation conditions place severe physical demands on the hydraulic fluids. 4. NON-TOXIC·BIO-DEGRADABLE HYDRO FE-SERIES is classified as “Non-Toxic” and “Bio-Degradable”. Unlike phosphate, this hydraulic fluid when burning, does not evolve large volumes of toxic smoke. HYDRO FE-SERIES when burned, generates non-toxic, non-noxious Smoke. 5. DEMULSIBILITY Using a good additive, It gives the equal of mineral hydraulic fluids in separability.

7. KWANGWOO CO., LTD R&D CENTER 77 Environment friendly industry. ● Water gate, sea dike, dredger Environment harmful industry ● trash burner Iron, steel industry ● Blast furnace, Casting machine, Electric furnace, Hot rolling mills Glass manufacturing.. Application (HYDRO FE-SERIES)

8. KWANGWOO CO., LTD R&D CENTER 88 Our customers

9. KWANGWOO CO., LTD R&D CENTER 99 HYDRO WG-SERIES is a Water-Glycol Fire-resistant Hydraulic Fluid containing a glycol, a high molecular weight poly glycol and the additives. HYDRO WG-SERIES was developed to extend the life-time of fluid itself. Because it is resistant to oxidation and thermal degradation and to the formation of sludge and gum. Product list HYDRO WG-Series (ISO L-HFC) (Water-Glycol Fire-resistant Hydraulic Fluid) Fire resistant Hydraulic fluids WG-38WG-46WG-51WG-56WG-68 Specific Gravity(15/4 ℃ ) 1.081.081.081.081.08 Viscosity(40 ℃,cSt) 38.046.051.056.068.0 Viscosity Index 220226230234235 Pour point ( ℃ ) -30 Max pH(100%) pH(100%)9.89.89.79.79.7 ColorRedRedRedRedRed

10. KWANGWOO CO., LTD R&D CENTER 10 Special Feature(HYDRO WG-SERIES) 1. FIRE-RESISTANCE HYDRO WG-SERIES is not only totally uncombustible but also do not ignite respectively burn in most cases, where a conventional mineral-based hydraulic oil will do. 2. VISCOSITY PROPERTIES High V.I (Viscosity Index) and Low P.P (Pour Point) enable this hydraulic fluid to accommodate wide temperature fluctuations. 3. ANTI WEAR PROPERTIES Excellent Lubricity enable to applicate for severe condition(140 ∼ 210 ㎏ f/ ㎠ ), and this fluid has proven it's outstanding anti-wear properties in practical application in all kinds of equipment which was designed for the application of water-glycol fluid respectively mineral fluid. 4. CORROSION PROTECTION HYDRO WG-SERIES contains vapor-phase corrosion inhibitors and gives sufficient protection.

11. KWANGWOO CO., LTD R&D CENTER 11 Iron, steel industry ● Blast furnace, Casting machine, Coke oven, Electric furnace Glass manufacturing, oven, Slag transport Application(HYDRO WG-SERIES)

12. KWANGWOO CO., LTD R&D CENTER 12 Our customers