9/16/2023 0 Comments 220 cst viscosity![]() These numbers refer to the kinematic viscosity of the oil in centistokes at 40 degrees C. The numbers associated with the ISO VG are as follows: ISO VISCOSITY GRADE (ISO VG) 2 The International Standards Organisation, Viscosity Grade (ISO VG) is a grading system that is generally used to describe industrial oils ie oils used in stationary plant (pumps, turbines, gearboxes, compressors etc). The different systems are convertible but only for measurements made at the same temperature. Engler Degrees (Europe), Redwood Seconds (UK), and Saybolt Universal Seconds (USA). Although centistoke units will be used throughout this article, different units are used in other parts of the world e.g. Oil grades are usually described in kinematic viscosity (normally at 40 degrees C). The two viscosity measurements are related to one another by the density of the fluid: nD / p = nKĭynamic viscosity is of little concern when describing an oil's viscosity grade. Dynamic viscosity nD = 1 centipoise (cP) = 1 mPa.S Dynamic viscosity is measured in centipoise and one centipoise equals one millipascal second. Kinematic viscosity is not the only viscosity measurement that can be made there is also dynamic viscosity (sometimes called absolute viscosity) which is a measurement of a fluid's resistance to shear at a specified temperature. The type of oil under consideration and its properties determine which temperature is employed, although 40 degrees C is used most commonly. Two industry temperature standards are used when measuring kinematic viscosity, namely 40 degrees C and 100 degrees C. It is important to note that as temperature increases, viscosity decreases, so one must always state the temperature at which viscosity is measured, otherwise the reading will be meaningless. Kinematic Viscosity nK = 1 Centistoke (cSt) = 1 mm 2 /s The symbol for viscosity is denoted by the Greek letter 'eta'. Kinematic viscosity is measured in centistokes (cSt) and one centistoke equals one millimetre squared per second. A fluid's resistance to flow is known as kinematic viscosity and this is the measurement that is of greatest concern to people using lubricants. It is a measure of the oil's thickness thick oil has a high viscosity while thin oil has a low viscosity. This is defined as the oil's resistance to flow at a specified temperature. The most important property of an oil is its viscosity. The classifications, which include ISO, SAE, API, CCMC, SABS, JAMA and ISLS, are each followed by a series of numbers and letters detailing either the viscosity of the oil or its performance properties. When purchasing a can, drum or tankerful of oil, it is important to realise that a number of international classification systems are used to describe the product and its uses. Oil classifications either describe viscosity or performance. The graphic curve will be updated as well.This article was first published in 2001. All other values will be re-calculated automatically. Just put your values (either imperial or metrical) in the appropriate fields below and press ENTER. The use of any of the calculators’ results is at the user’s sole risk. ![]() The calculator below is for informative purposes only. You can calculate pre-filled values of oil classified by ISO 3448 with grades VG22, VG32, VG46 or VG68 (at viscosity Index = 100) or enter specific values for any other oils. These data is enough to determine kinematic viscosity at any other values of temperature and as well Viscosity Index. the Viscosity Index (VI) by the formulas specified in ASTM D2270 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ISO 2909 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ГОСТ 25371-2018 (`Нефтепродукты.the kinematic viscosity values, depends from temperature, calculated by the formulas specified in ASTM D341 – (‘Standard Practice for Viscosity-Temperature Charts for Liquid Petroleum Products’).The interpolation calculator provided below is used to determine: ![]()
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