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Viscosity index calculation formula

Viscosity index calculation formula

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where U is the oil's kinematic viscosity at 40 °C ( °F), and L and H are values based on the oil's kinematic viscosity at °C ( Standard practice for calculating viscosity index from kinematic viscosity at 40 and °C. Calculator for viscosity index (VI) according to ASTM D and ISO . Viscosity index (VI) calculator. KV40 °C cSt (mm²/s). KV °C cSt (mm²/s). Viscosity index. Calculate Clear. Kinematic viscosity @ ºC calculator. Viscosity.

You need two reference oils. One with a VI of and one with a VI of 0. Both must have the same viscosity as the unknown oil @ C. H = cinematic viscosity. Viscosity indexes are used most commonly in the case of hydraulic and lubricating oils. For any oil, the viscosity index or VI is given by the equation. Index is an arbitrary measure for the change of viscosity with variations in temperature. The lower the VI, the greater the change of viscosity of the oil with.

15 Mar When we know the viscosity of an oil at 40°C and °C we can calculate its viscosity index. When we know the ISO Viscosity Grade (40℃). for Calculating Viscosity Index from Kinematic Viscosity at 40 and °C. Method D was prepared in compliance with worldwide agreements reached. Calculating Viscosity Index Between VI = o and VI = *. By R. SCHNURMANN **. FOR OVER a quarter of a century the petroleum industry has become. Viscosity Index (VI) Calculator. Kin. Visc. @ 40°C cSt (mm²/s). Kin. Visc. @°C cSt (mm²/s). Viscosity Index. Calculate Clear. 1 Nov Equations are provided for calculating viscosity index for petroleum products having kinematic viscosities above 70 mm2/s (cSt) at °C.

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