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Univis HVI is a line of premium performance anti-wear hydraulic oils characterised by their unusually high viscosity indexes. They are engineered to maintain close viscosity control over wide temperature range applications. Because of their resistance to viscosity change, Univis HVI oils are recommended for hydraulic systems that are subject to wide temperature variations. Many of these systems are sensitive to changes in viscosity of the hydraulic oil, since they depend on uniform viscosity for hydraulic accuracy. They exhibit optimum flow characteristics at sub-zero temperatures and the oils are resistant to shearing and viscosity loss so that system efficiency is maintained and internal pump leakage is minimised at high operating temperatures and pressures. These high quality hydraulic oils also provide very good anti-wear protection for high-pressure vane, piston and gear pumps. The Univis HVI oils are designed with excellent oxidation stability reducing deposit formation and improving pump and valve performance. They were developed in conjunction with the major OEM's to meet the stringent requirements of severe hydraulic systems using high pressure, high output pumps as well as handling the critical requirements of other hydraulic system components.
Univis HVI oils provide outstanding viscosity control over a wide temperature range. Their excellent oxidation resistance allows extension of oil and filter change intervals while assuring clean systems. Their high level of anti-wear properties and excellent film strength characteristics result in exceptional equipment performance that not only results in fewer breakdowns but helps improve production capacity. Their controlled demulsibility permits the oils to work well in systems contaminated with small amounts of water yet readily separate large amounts of water.
The Univis HVI oils provide the following benefits:
|Univis HVI||Univis HVI 13||Univis HVI 26|
|ISO Viscosity Grade|
|Viscosity, ASTM D 445|
|cSt @ 40ºC||13.5||25.8|
|cSt @ 100ºC||5.3||9.3|
|Viscosity Index, ASTM D 2270||404||376|
|Kinematic Viscosity @ -40ºC, ASTM D 445, cSt||371||896|
|Copper Strip Corrosion, ASTM D 130||1A||1A|
|Pour Point, ºC, ASTM D 97||-60||-60|
|Flash Point, ºC, ASTM D 92||101||103|