Most manufacturers use a solvent refining process, whereas these oils are produced by a unique hydrotreating process. This process eliminates nitrogen, sulphur and oxygen and the aromatic hydrocarbons, leaving a clear base stock essentially free of impurities. When combined with additives, the Ultragrade® Performance oils give improved vacuum performance, thermal and oxidation stability and rust inhibition. The anti-oxidants included in the oils enable the pump to withstand high operating temperatures without oil degradation, so extending intervals between oil changes. The properties of the oils allow them to be used in a wide range of applications.

Uses include:

• Small rotary vane pumps where cold start capability or low starting torque is needed
• Small- and medium-sized two-stage rotary vane pumps where high ultimate vacuum and good lubrication are required
• Gearboxes and drive trains under vacuum or partial pressure, large single stage rotary vane pumps requiring a heavier grade oil to create a vacuum seal
• Large capacity two-stage rotary vane pumps, especially when used under high load or fast duty cycles