Importantly, the graphs can be saved for use in the users own reports.
![viscosity index calculator viscosity index calculator](http://www.chinalubricant.com/topic/2012/app/vct/skin/SC_help_en.jpg)
![viscosity index calculator viscosity index calculator](https://fluidpower.pro/wp-content/uploads/2018/05/Viscosity-Temperature-chart.png)
Viscosity index calculator registration#
Registration takes just seconds and only requires name, company and email address. More detailed results, including graphs (some in 3D), can be accessed by logging in (existing users) or registering (new users). This free-of-charge Webtec app is the company’s ‘light’ version. To see the effects on viscosity of fluctuations in temperature or pressure, the user simply alters the values in these fields accordingly, making hydraulic measurement and control easy to achieve. This calculator uses centi-Stokes (cSt), which are equivalent to mm2/s. The Viscosity Index is a measure of how much the viscosity changes with temperature a higher VI indicates less change. Using Webtec’s app, engineers simply select the oil being used, along with the system temperature (☌) and pressure (bar), hit the ‘submit’ button and up pops the viscosity (cSt). If you know the viscosity of an oil at 40✬ and 100✬, you can easily calculate its Viscosity Index (VI). These oils are most-often badged in terms of their ISO number or grade, where common grades for hydraulic circuits include ISO 32, 46 and 68. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils.The lower the VI, the more the viscosity is affected by changes in temperature.
![viscosity index calculator viscosity index calculator](https://slideplayer.com/slide/13404200/80/images/10/Viscosity+index+VI+%3D+(L+-+U)%2F+(L+-+H)+*+10.jpg)
Hydraulic fluid suppliers provide oils with different viscosities. The viscosity index (VI) is an arbitrary, unit-less measure of a fluids change in viscosity relative to temperature change. Webtec has launched a new on-line hydraulic oil viscosity calculator app which calculates the viscosity of hydraulic oil at different pressures.