Hygem Hydraulic Oils are formulated with refined paraffinic base oils. They provide excellent anti-wear protection, oxidation and corrosion inhibition, as well as foam and aeration suppression. All grades have excellent demulsibility characteristics. Hydraulic systems, due to the nature of their operation, experience accelerated wear unless they are protected by clean, high quality anti -wear hydraulic oils. Surging pressures in pumps and valves can increase metal-to-metal contact unless anti-wear protection is present. The anti-wear additives in our Hydraulic Oils create a protective film on the metal surfaces. This protective film minimizes metal-to-metal contact, which is most severe in vane- and gear-type pumps.