Viscosity Measurement Flow Cup

Excess fluid is collected in the gutter channel.

Viscosity measurement flow cup.

The viscosity of a fluid is a measure of its resistance to deformation at a given rate. The process of flow through an orifice can often be used as a relative measurement and classification of viscosity. Many printers coaters measure their viscosity using cups with holes in the bottom by finding how many seconds it takes to empty the full cup or rather for the flow to break. This measured kinematic viscosity is generally expressed in seconds of flow time which can be converted into centistokes using a viscosity disc calculator.

Additionally knowing the viscosity of your paint allows you to have a reference range so you can select equipment settings that will let you achieve a. Efflux cups flow cups based on different design types zahn shell gardco ez zahn gardco signature zahn and din the unit of measurement is seconds or the time it takes to drain the test cup all cups hold a standard amount of fluid. However the conditions in a simple flow. Why get a viscosity cup viscosity cups like ford and zahn cups are handy tools at as a painter.

For liquids it corresponds to the informal concept of thickness. Viscosity cups consist of a hollow cylinder which terminate in a nozzle in the bottom. And they are available in a range of designs in accordance with national and international standards with various orifice diameters to suit different viscosities. The viscosity is established in terms of the time in seconds in which a precisely controlled volume of fluid flows out through a nozzle of the viscosity cup.

Different cups have different shapes and hole sizes and because times too short or too long are unsuitable for any given viscosity there is an optimum cup with times. For example syrup has a higher viscosity than water. The unit of measurement is centipoise a universally used metric unit of viscosity. Viscosity flow cups are very easy to use instruments of anodized aluminum with a stainless steel orifice for measuring the consistency of paints varnishes and similar products.

A flow cup is a cup of a specified size and volume with an overflow channel at the top and a hole of a defined size in the bottom. Viscosity can be conceptualized as quantifying the internal frictional force that arises between adjacent layers of fluid that are in relative motion. Under ideal conditions this rate of flow would be proportional to the kinematic viscosity expressed in stokes and centistokes that is dependent upon the specific gravity of the draining liquid. The measured kinematic viscosity is generally expressed in seconds s flow time.