Unisol AW Hydro is an anti-wear hydraulic oil manufactured in Rajkot, Gujarat by Satyam Petroleum, available in three ISO viscosity grades: ISO 32, ISO 46 and ISO 68. The number is the oil's viscosity at 40°C. ISO 32 is the thinnest, suited to high-speed systems and cooler operating conditions. ISO 46 is the general-purpose grade for most industrial and mobile equipment in Indian ambient temperatures. ISO 68 is the thickest, for high-temperature or heavily loaded systems. All three carry an anti-wear additive package that forms a protective film on pump and valve surfaces under pressure, together with oxidation stability, anti-rust and anti-foam performance. Any hydraulic system operating above roughly 1,000 psi should use an AW grade rather than a plain mineral hydraulic oil, and you should always follow the equipment manufacturer's specified grade. Unisol supplies AW Hydro to distributors across India, in bulk for export, and under private label.
Anti-wear hydraulic oils for industrial and mobile equipment — protecting pumps and valves while maintaining performance under pressure.
Unisol Lubricants manufactures 1 hydraulic oils at its ISO 9001:2015 certified plant in Rajkot, Gujarat, India.
Anti-wear hydraulic oil for industrial and mobile equipment — excellent oxidation stability, anti-rust and anti-foam performance to protect pumps and valves. Available in ISO 32, 46 and 68 grades.
Neither is better in general — they suit different conditions. ISO 32 is thinner and flows more easily, which suits high-speed systems and colder operating temperatures. ISO 46 is thicker and holds its film better under heat and load, which is why it is the usual year-round choice for most industrial and mobile equipment in Indian ambient temperatures. Use the grade your equipment manufacturer specifies; where the manual gives a range, choose 46 for hotter conditions and 32 for colder ones.
Mixing two anti-wear hydraulic oils of the same type will not damage the system, but it produces an intermediate viscosity that may fall outside what the pump was designed for, and it dilutes the additive package if the two oils come from different manufacturers. Treat it as an emergency top-up only. Wherever possible, top up with the same grade from the same supplier, and change the full charge rather than blending grades permanently.
Not necessarily. ISO 46 describes only the viscosity grade — the oil's thickness at 40°C. AW 46 describes an ISO 46 oil that also carries an anti-wear additive package. A plain ISO 46 mineral oil without AW additives will not protect vanes, pistons and valves in a pressurised system. If your equipment calls for AW 46, use an anti-wear oil such as Unisol AW Hydro 46, not a straight ISO 46 grade.
AW 46 is the general-purpose anti-wear hydraulic fluid used in industrial hydraulic power packs, injection moulding machines, presses, machine tools, and mobile equipment such as excavators, loaders, tippers and tractor hydraulics. It suits systems running at moderate to high pressure in normal to warm ambient temperatures, which covers most Indian operating conditions.
Typical service life is 2,000 to 4,000 operating hours, but condition matters more than hours. Change the oil when it darkens, smells burnt, turns cloudy from water ingress, or when an oil analysis shows the additive package is depleted. Dusty sites, high operating temperatures and continuous duty all shorten the interval.
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