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Your Professional Rotational Viscometer Supplier!

 

Koliou Group is a Chinese company specializing in the development and production of cementing additives and cementing testing instruments.

Quick response
We promise to respond to your inquiries within 24 hours to ensure that you receive the information and support you need in a timely manner.

 

Strong production capacity
Koli Petroleum has added four new production lines, including vacuum drying powder production line and liquid polymer synthesis production line, all of which are fully automated with human-machine interactive control, with a total production capacity of 10,000 tons/year.

 

Complete qualifications
It has passed ISO14001, ISO9000 and GB/T28001 certifications, and the powdered AMPS polymer fluid loss reducer has won the "National Key New Product" certificate.

 

Rich experience
The company has nearly 20 years of experience in this field.

 
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Features of Rotational Viscometer
 

 

01/

High Precision
Suitable for liquids with a wide range of viscosities, it can provide high-precision viscosity measurement and is commonly used in industry and scientific research.

02/

Strong Adaptability
Liquids that can measure the effect of shear rate on viscosity are suitable for viscosity testing of non-Newtonian fluids (such as plastic, pseudoplastic, rheological liquids, etc.).

03/

Real-time Monitoring
Many modern rotational viscometers are equipped with digital displays and data recording functions, which can monitor and record viscosity changes in real time.

04/

Temperature Control
Some rotational viscometers are equipped with temperature control devices, which can be measured under different temperature conditions to accurately control the effect of liquid temperature on viscosity.

05/

Easy to operate
Generally, the operation is simple. The user only needs to put the liquid sample into the measuring cup, select the appropriate speed and rotation time, and then the viscosity can be measured.

06/

Standardization
The measurement results of the rotational viscometer are easily aligned with international standards, which facilitates the comparison of results between different laboratories.

 

Application of Rotational Viscometer

 

 

Food Industry

Used to measure the viscosity of sauces, dressings, and dairy products (like yogurt and ice cream) to ensure product consistency and stability. This helps in quality control and formulation.

Pharmaceuticals

Essential for measuring the viscosity of syrups, gels, and other liquid formulations. This data is crucial for ensuring proper dosing, stability, and bioavailability of medications.

Cosmetics and Personal Care

Employed for testing creams, lotions, and other personal care products. Viscosity measurements help in optimizing formulations for application and stability.

Paints and Coatings

Used to determine the flow characteristics of paints, varnishes, and coatings. This is important for application methods such as spraying, rolling, or brushing.

Polymers and Plastics

Measures the viscosity of polymer solutions and melts, which aids in processing and quality control in manufacturing.

Oil and Gas

Utilized to assess the viscosity of crude oil and refined products. This information is critical for pipeline transportation and refining processes.

Biotechnology

Helps in the characterization of biological fluids, such as blood or whey proteins, to understand their behavior under different shear conditions.

Chemical Industry

Employed in the formulation and analysis of chemical products, where viscosity affects mixing, pumping, and processing behavior.

Textile Industry

Measures the viscosity of dye solutions and finishing chemicals to optimize processing conditions and ensure quality.

 

Types of Rotational Viscometer

 

Rotational Viscometer Parts
Rotational Viscometer Parts
Rotational Viscometer Parts
Cementing Rotational Viscometer

Cup and Bob Viscometer
This consists of a concentric cylinder setup where the outer cup is stationary, and the inner bob rotates. The viscosity is determined based on the torque required to rotate the bob.

 

Cone and Plate Viscometer
In this design, a cone is placed above a flat plate, and the sample is placed in the gap. The cone's angle allows for a uniform shear rate, which makes this type particularly useful for low-viscosity fluids.

 

Haake Viscotester
This is a type of rotational viscometer that allows for precise measurement of viscosity under various shear rates and temperatures. It can be equipped with different measuring geometries for specific applications.

 

Brookfield Viscometer
This is one of the most widely used types of rotational viscometers. It uses a rotating spindle immersed in the fluid to measure the viscosity. The Brookfield can operate at different speeds and is useful for a variety of fluid types.

 

Rheometer
While often classified separately, some rheometers operate as rotational viscometers, providing detailed information about the flow and deformation of complex fluids. They can measure not just viscosity but also other rheological properties.

 

Digital Rotational Viscometer
These modern devices use digital displays and often provide real-time readings of viscosity along with additional features like data logging and analysis capabilities.

 

Multi-Shear Rotational Viscometer
This type allows the user to measure viscosity at different shear rates without the need to change spindles. It is beneficial for analyzing non-Newtonian fluids.

 

Material of Rotational Viscometer
 

 

Stainless Steel

Often used for components like the body, spindle, and rotor due to its strength, durability, and resistance to corrosion. It's suitable for a wide range of chemicals and temperature conditions.

Glass

Some viscometers feature glass components for observational purposes or to maintain transparency for certain types of fluids or reactions.

Plastics

Certain components may be made from high-grade plastics that offer chemical resistance, particularly when measuring corrosive fluids.

Ceramics

Used for specific applications where high wear resistance is necessary, especially in harsh environments.

Rubber or Silicone Seals

Used to provide leak-proof seals and protect against contamination, withstanding the viscosity of the fluids measured.

Bronze or other alloys

Sometimes used for bearings or other structural components that require specific properties like low friction or high wear resistance.

 

Maintenance precautions of Rotational Viscometer

 

 

Calibration

  • Regular Calibration: Ensure the viscometer is calibrated regularly as per manufacturer’s guidelines or industry standards.
  • Use Standard Fluids: Utilize certified viscosity standards for calibration checks.


Cleaning

  • Immediate Cleaning: Clean the measuring spindle and sample container immediately after use to prevent residue buildup.
  • Use Appropriate Solvents: Use recommended solvents for cleaning based on the type of fluid measured, avoiding corrosive or harsh chemicals that could damage the instrument.
  • Gentle Cleaning: Use soft cloths or brushes to avoid scratching the spindle or other sensitive components.

 

Storage

  • Protective Cover: Store the viscometer with a protective cover to prevent dust accumulation and physical damage.
  • Stable Environment: Keep the instrument in a stable environment (temperature and humidity) to avoid any physical deformation or performance degradation.

 

Avoid Overloading

  • Correct Sample Volume: Always use the recommended sample volume to avoid overloading the spindle and damaging the viscometer.
  • Not Measure Outside Limitations: Avoid using the instrument beyond its specified measurement range to prevent strain or wear.

 

Check for Damage

  • Regular Inspections: Regularly inspect the spindle and other components for signs of wear, cracks, or damage.
  • Look for Loose Connections: Check for any loose fittings or connections and fix them immediately.

 

Temperature Control

  • Controlled Temperature: Manage the temperature of the sample; use a temperature control bath if necessary to maintain consistent conditions during measurement.


Avoid Vibration

  • Stable Surface: Place the viscometer on a flat, stable surface to avoid any vibrations that could lead to inaccurate readings.
  • Isolation from Equipment: Keep it away from heavy machinery that might cause disturbances.

 

Certificate

 

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Frequently Asked Questions

Q: What is a rotational viscometer?

A: A rotational viscometer measures the viscosity of a fluid by applying a rotational motion to a spindle that is immersed in the fluid. The torque required to maintain a constant rotational speed is measured and correlated to the viscosity of the fluid.

Q: How does a rotational viscometer work?

A: The instrument uses a rotating spindle that is placed in the fluid. As the spindle is rotated, the fluid's resistance to flow (viscosity) causes a torque to act on the spindle. Sensors measure this torque, which is then converted into viscosity readings, often displayed in units like centipoise (cP).

Q: What are the types of rotational viscometers?

A: There are several types of rotational viscometers:
- Brookfield Viscometers: Commonly used in industries, with spindles of varying shapes and sizes for different samples.
- Cone-and-Plate Viscometers: Consist of a flat plate and a cone, ideal for low-viscosity fluids.
- Fall Ball Viscometers: Measure viscosity by the time taken by a ball to fall through the fluid.

Q: What materials can be measured using a rotational viscometer?

A: Rotational viscometers can measure a wide variety of materials, including:
- Newtonian fluids (e.g., water, oils)
- Non-Newtonian fluids (e.g., paints, pastes, slurries)
- Polymer solutions and melts

Q: What factors affect viscosity readings?

A: Several factors can influence viscosity measurements:
- Temperature: Viscosity often decreases with increasing temperature.
- Shear rate: Non-Newtonian fluids may exhibit different viscosities at different shear rates.
- Composition: The concentration of solids, temperature, and the presence of additives can affect viscosity.

Q: How do I choose the right spindle for my sample?

A: Choosing the right spindle depends on the viscosity range of your sample. Spindles come in different shapes and sizes to accommodate different viscosities. Refer to the manufacturer’s guidelines for selection.

Q: What is the significance of calibration for a rotational viscometer?

A: Calibration ensures accurate and consistent measurements. It involves comparing the viscometer's readings with known standards and making adjustments as necessary. Periodic calibration is essential for maintaining accuracy.

Q: How should I clean my rotational viscometer?

A: After use, clean the spindle and the measurement chamber with appropriate solvents that will not damage the equipment. Make sure to adhere to the manufacturer's cleaning recommendations to avoid contamination of future samples.

Q: Can I use a rotational viscometer for both high and low-viscosity fluids?

A: Yes, many rotational viscometers can accommodate a wide range of viscosities, but specific models and spindles are designed to measure low or high viscosity fluids effectively. Always check the specifications of the viscometer.

Q: What are the applications of rotational viscometers?

A: Rotational viscometers are used in various industries, including:
- Food and beverage (e.g., sauces, beverages)
- Pharmaceuticals (e.g., creams, gels)
- Chemical manufacturing (e.g., paints, coatings)
- Petrochemicals (e.g., oils, fuels)

Tianjin Kelioil Engineering Material and Technology Co., Ltd. is one of the most professional rotational viscometer manufacturers and suppliers in China, featured by quality products and low price. Please rest assured to buy rotational viscometer for sale here from our factory. Contact us for free sample.

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