Why it is called Redwood Viscometer?

Why it is called Redwood Viscometer?

‘Redwood Viscometer’ determines the viscosity in terms of seconds (which are terms as Redwood seconds), a time taken by oil to pass through a standard orifice, and collection of the same oil in 50 cc flask. Originally Redwood Viscometer was developed for the measurement of viscosity of petroleum products.

What is meant by Redwood Viscometer?

[′red‚wu̇d vi′skäm·əd·ər] (engineering) A standard British-type viscometer in which the viscosity is determined by the time, in seconds, required for a certain quantity of liquid to pass out through the orifice under given conditions; used for determining viscosities of petroleum oils.

Who invented Redwood Viscometer?

Notes. Sir Boverton Redwood, a consultant to the oil industry, designed this instrument in 1885. It was based on an earlier design by chemist C Rumble, an employee of Price’s Patent Candle Company of Battersea, London, UK.

What is the difference between Redwood Viscometer?

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. The flow time of viscous oils is one-tenth of the flow time obtained by redwood viscometer 1.

What is use of redwood viscometer?

A redwood viscometer is used to measure the flow of eight different liquids including engine oil, sunflower oil, soybean oil, glycerol, thermic fluid (Hy- therm), coconut oil, water and ghee. Kinematic viscosity is determined by redwood viscometer with help of its constants.

Why is Redwood viscosity expressed in seconds?

When expressed in seconds Redwood at 100 degrees Fahrenheit, it is the time it takes for a fixed amount of fuel to pass through an orifice of fixed size at 100 degrees Fahrenheit. The viscosity of petroleum oil increases when oil is cooled and decreases when it is heated.

Why is water stirred during the Redwood viscometer practical?

The oil is heated by heating the water bath by means of an immersed electric heater in the water bath , The provision is made for stirring the water , to maintain the uniform temperature in the water bath and to place the thermometer ti record the temperature of oil and water bath .

What is the principle of viscometer?

These viscometers use the principle of ‘rotational viscometry’, i.e. their measurement of product viscosity is based upon immersing a specifically selected spindle within a sample of the product followed by measurement of the torque required to rotate the spindle at a set speed whilst immersed within the product sample …

What is orifice in Redwood viscometer?

Explanation: The redwood viscometer consists of a vertical cylindrical oil cup with an orifice in the centre of its base. The orifice can be closed by a ball. A hook pointing upward serve as a guide mark for filling the oil. The cylindrical cup is surrounded by a water bath.

How does a redwood viscometer work?

The redwood viscometer consist of vertical cylindrical oil cup with an orifice in the centre of its base . A hook pointing upward serve as a guide mark for filling the oil . The cylindrical cup is surrounded by the water bath . The water bath maintain the temperature of the oil to be tested at constant temperature .

What is the efflux of the Redwood viscometer no2?

Explanation: The efflux of the redwood viscometer no2 is 200 seconds or less. Its jet for the outflow of the oil is having larger diameter. Test thermometer is one of the parts of the redwood viscometer.

How does Redwood viscometer work?

Who are the exporters of Redwood viscometer in India?

Exporters and Suppliers of Redwood Viscometer in Mumbai, India through an esteemed company is called Universal Motion Inc. Home About Us Services Site Map Contact Us About About our Company

How big is a redwood viscometer jet orifice?

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. It is used to determine the viscosity of viscous oils having flow (efflux) time more than 2000 seconds.

What can a tube viscometer be used for?

The tube viscometer for Bio-UCF quality control The viscometer can be used as a classical viscometer to study the rheological law of fluids, using the Mooney-Rabinowitsch relationship. For a constant flowrate, it is possible to observe on line variations of apparent viscosity for a constant shear rate.

How many types of viscometers are there in the world?

Here are the six types we’ll cover: Orifice viscometers. Capillary viscometers. Falling piston viscometers. Rotational viscometers. Falling ball viscometers.