What is the Hydraulic oil ?

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

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.

The controls of hydraulic oil

Kinematic viscosity

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

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.

Sort of Hydraulic oil(ISO)

Fire resistant Hydraulic fluids

ECO POWER-Series (ISO L-HFDU)

(Polyol ester based Biodegradability Fire-resistant Hydraulic Fluid)

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 (Eco-Power Series)

 EcoPowerEcoPowerEcoPowerEcoPowerEcoPower
  32 FE-46 FE-56 FE-56R FE-68
Specific Gravity(15/4℃) 0.91 0.92 0.92 0.92 0.92
Viscosity(40℃,cSt) 32.0 46.0 56.0 56.0 68.0
Viscosity Index 180 178 180 180 176
Pour point (℃) -35 -25 -25 -25 -25
Pollution level (NAS 1638) 7 7 7 7 7
Color Yellow transparent Yellowish Brown Yellowish Brown Red Yellowish Brown

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.

  5. HYDRO FE-SERIES when burned, generates non-toxic, non-noxious Smoke.
  6. DEMULSIBILITY

    Using a good additive, It gives the equal of mineral hydraulic fluids in separability.

Application (HYDRO FE-SERIES)

Fire resistant Hydraulic fluids

HYDRO WG-Series (ISO L-HFC)

(Water-Glycol Fire-resistant Hydraulic Fluid)

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

 WG-38WG-46WG-51WG-56WG-68
Specific Gravity(15/4℃) 1.08 1.08 1.08 1.08 1.08
Viscosity(40℃,cSt) 38.0 46.0 51.0 56.0 68.0
Viscosity Index 220 226 230 234 235
Pour point (℃) -30 Max -30 Max -30 Max -30 Max -30 Max
pH(100%) 9.8 9.8 9.7 9.7 9.7
Color Red Red Red Red Red

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.

Application(HYDRO WG-SERIES)

Iron, steel industry

  • Blast furnace, Casting machine, Coke oven, Electric furnace Glass manufacturing, oven, Slag transport

Additional information