How does a Saybolt viscometer work?
How does a Saybolt viscometer work?
A device used to measure the viscosity of a fluid. 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 viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.
What is Saybolt Furol viscosity?
Saybolt Furol viscosity – the efflux time in seconds required for 60 milliliters of a petroleum product to flow through the calibrated orifice of a Saybolt Purol viscometer, under carefully controlled temperature, as prescribed by test method ASTM D 88.
What is Saybolt number?
The Saybolt Colour scale is used for grading light coloured petroleum products including aviation fuels, kerosine, naphthas, white mineral oils, hydrocarbon solvents and petroleum waxes. The faintest coloration is Saybolt-colour number +30, the strongest evaluable Saybolt coloration value is -16.
What is the difference between Redwood viscometer and Saybolt viscometer?
Answer: A Redwood viscometer works on the same principle of Saybolt viscometer. Here, the stopper is replaced with an orifice and Redwood seconds is defined for collection of 50ml of liquid to flow out of orifice. In general, both the viscometers are used to compare the viscosities of different liquid.
What is SSF Saybolt second Furol?
Saybolt Universal Seconds, SSU, is the kinematic viscosity as determined by the time in seconds required for 60 cc of fluid to flow through a standard orifice. Saybolt-Furol, SSF, utilizes a larger orifice and is used for very viscous fluids.
What is the meaning of Saybolt?
noun. US. 1Attributive Designating instruments, methods, and concepts devised by or associated with Saybolt; (also) with reference to the use of such instruments, methods, and concepts; as “Saybolt method”, “Saybolt reading”, etc. 2A Saybolt viscometer.
How do you convert Centipoise to centistokes?
Centipoise = centistokes x specific gravity where specific gravity is assumed to be 0.8 (except for water). To find the exact cp of your fluid: cp = cSt x (weight per gallon x 0.120).
What is the difference between Redwood viscometer No 1 and 2?
The jet orifice of redwood viscometer 1 has an internal diameter of 1.62mm and length of 10 mm. The jet orifice of redwood viscometer 2 has an internal diameter of 3.8 mm and length of 15mm. It is used to determine the viscosity of less viscous oils having flow (efflux) time less than 2000 second.
How do you calculate viscosity from Saybolt universal seconds?
Saybolt universal seconds (t) can be converted to kinematic viscosity (v) by the following equations: When t < 100 secs, v = 0.226t – 195/t Centistokes When t >100 secs, v = 0.220t – 135/t Centistokes The viscosity determinations should be conducted in a room free from drafts and rapid changes in temperature the highest degree of accuracy.
What is the function of the 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. 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.
What is specific viscosity in viscometer?
Saybolt Viscometer 1 The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. 2 The units of viscosity is poise and centipoise . 3 specific viscosity is the ratio of the viscosity of fluid to the viscosity of water at 20 degree Celsius.
How to test petroleum products with a viscometer?
To obtain high accuracy the liquid holding vessel and orifice are temperature controlled by immersing them in a thermostatically controlled bath. 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.
