SAYBOLT VISCOMETER EXPERIMENT PDF

The apparatus is supplied with two S. A rubber cork stopper arrangement is provided also at the bottom to facilitate start and stop the oil flow from the Viscometer. Two thermometers are provided to measure water bath temperature and oil temperature under test. A round flat-bottomed flask with a ml marking on the neck is provided to measure 60 ml of oil flow against time. The oil cup with the water bath is supported on a stand with levelly screws. Clean the oil cup with a solvent preferably C.

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The saybolt viscometer controls the heat of the fluid and the viscosity is the time is takes the fluid to fill a 60cc container. The device used for measurement of viscosity is known as viscometer. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. The units of viscosity is poise and centipoise. Since the water has a viscosity of 1 cp at 20 degree Celsius. Kinematic viscosity is defined as ratio of dynamic viscosity to the density of the fluid.

Efflux cup viscometers are most commonly used for fieldwork to measure the viscosity of oils, syrups, varnish, paints and Bitumen emulsions. The testing procedure is quite similar to the capillary-tube viscometers where efflux time of a specified volume of fluid is measured through fixed orifice at the bottom of a cup to represent the viscosity of the fluid.

The saybolt viscometer, one of the efflux cup viscometers is the standard instrument for testing petroleum products. There are three types of orifices available-Universal, Furol, Asphalt. The furol and asphalt orifices, respectively, have an efflux time of approximately, one-tenth and one-hundredth that of the universal orifice.

The cup orifice combination should be selected to provide an effllux time within the range of 20 to seconds. Of these types, the universal orifice saybolt universal viscometer is most commonly used and its efflux time is designated as saybolt universal seconds SUS. The universal viscometer measures the time required for 60 cc of sample fluid to flow out through an orifice having dimensions of 0.

Advantages It has a digital meter to measure temperature and so reading is more accurate and precise. The coils wrap around the container uniformly so uniform temperature can be obtained. Viscosity can be directly compared for two or more liquids. Disadvantages The main disadvantage of the capillary tube viscometer is the errors that arise due to the variation in the head loss and other parameters.

Efflux cup viscometer have some inherent inaccuracies Application Efflux viscometer are most commonly used fieldwork to measure the viscosity of oil , syrups, varnish, paints. It is used for testing petroleum products. Share With Your Friends.

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Saybolt viscometers

The saybolt viscometer controls the heat of the fluid and the viscosity is the time is takes the fluid to fill a 60cc container. The device used for measurement of viscosity is known as viscometer. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. The units of viscosity is poise and centipoise. Since the water has a viscosity of 1 cp at 20 degree Celsius.

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Saybolt Viscometer

The saybolt viscometer controls the heat of the fluid and the viscosity is the time is takes the fluid to fill a 60cc container. Efflux cup viscometers are most commonly used for fieldwork to measure the viscosity of oils, syrups, varnish, paints and Bitumen emulsions. The testing procedure is quite similar to the capillary-tube viscometers where efflux time of a specified volume of fluid is measured through fixed orifice at the bottom of a cup to represent the viscosity of the fluid. The saybolt viscometer, one of the efflux cup viscometers is the standard instrument for testing petroleum products. There are three types of orifices available-Universal, Furol, Asphalt.

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