Lubritherm Lubricity Comparison
The question of Lubricity comes up with Lubritherm Hydraulic Fluid because it has a low VG of 10 as compared with other hydraulic fluids, which carry an average Viscosity Grade (VG) of 40.
Oil hydraulics uses the oil to lubricate, which necessitates a VG 40 in order to have adequate oil film thickness to prevent galling (metal-to-metal contact). It is generally accepted that thin oils do not provide enough lubrication. When oils get hot, viscosity goes down and so does the lubricity, which is why oil-based hydraulics have critical operating temperature zones. Conversely, when oil gets below freeze point it becomes more viscous, and won't operate well as a hydraulic fluid. It should be noted that the heat rejection capability of Lubritherm is substantially higher than mineral oil, resulting in a cooler running system and significantly reducing the Viscosity Grade differential between mineral oil and Lubritherm.
Lubritherm Hydraulic Fluid does not contain oil. Within its chemistry it makes provision for superior lubrication, as good as mineral oils. The thin viscosity of Lubritherm and its lack of possible air entrainment help to give instant hydraulic response. Lubritherm hydraulic fluid provides continuous protection over an extended operating life, and is corrosion resistant.
LubeCorp's Lubritherm Hydraulic Fluid is Canadian Government certified as Environmentally Safe, Biodegradable, Absolutely Non-Toxic, and Fireproof, with an Extreme temperature range from -70°F to +175°F, and is used as a direct replacement to all petroleum, vegetable, or other synthetic hydraulic oils.
Summary of Four Ball (D4172) Wear Test Data for Various
Oils and Water Glycol Fluids
compiled by Vlad Kowalyk, P.Eng, VMK Engineering, Winnipeg, MB
(unless otherwise stated test conditions are 1 hr. 1200 rpm, 40 Kg, 75°C)
diameter (mm)
Grade
