Hydraulic System Lubricants

The hydraulic lubricants you will find at Geosantro are specially formulated fluids used to transfer power within hydraulic systems, such as in lifting machinery, presses, excavators, and industrial installations. Beyond just transferring movement, they protect internal components from wear, corrosion, and rust, while also cooling the system during operation to ensure everything runs like clockwork.

These numbers indicate the "viscosity" of the oil—essentially how thick or thin it is. ISO VG 46 is the most common "middle-ground" oil for general use. ISO VG 32 is thinner and is typically preferred for colder environments or high-precision systems, while ISO VG 68 is thicker and ideal for heavy-duty work or systems operating at very high temperatures to prevent the oil from thinning out too much.

We hear this question quite often, but the answer is a definitive no. Engine oils contain entirely different additives (such as detergents) that can cause foaming or destroy the seals of a hydraulic system. Geosantro’s specialized hydraulic oils, like the Triathlon series, are designed exclusively to withstand the massive pressures of hydraulic pumps without losing their vital lubricating properties.

The HLP label is an international standard that guarantees the lubricant contains specific additives for anti-wear and anti-oxidation protection. By choosing an HLP oil from our range, you know the product has been tested to protect metal parts from friction, prevent foaming, and separate easily from water—which is a lifesaver for the long-term health of your pump.

In Cyprus, extreme summer temperatures put significant stress on hydraulic systems, often making the oil much thinner. In these conditions, many professionals prefer ISO VG 68 or lubricants with a high viscosity index (HVLP), which maintain their thickness even when the machinery is "boiling hot." At Geosantro, we can advise you on which specific product will best withstand your workload under the sun.

Foaming is the ultimate "enemy" of hydraulic systems. When oil contains air bubbles, it becomes compressible, which causes the machine to lose its power, make strange noises, and leads to premature pump wear due to a phenomenon called cavitation. The lubricants we offer contain special anti-foaming additives that ensure constant pressure and smooth movement, even under intense operating stress.