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Why Use Centrifugal Pumps For viscous Fluids

Published on 2024/05/09

Viscosity fluids exhibit unique behavior that differs from more common liquids such as water. Their high flow resistance can lead to interesting phenomena such as slow pouring and viscosity. However, centrifugal pumps are a popular choice for conveying viscous fluids because of their ability to transfer such substances easily and efficiently. So, why do centrifugal pumps be used for viscous fluids?

Properties Of Viscous Fluids

Viscosity The viscosity of a liquid is the resistance to flow due to the presence of internal friction in the fluid. When fluid flows, there is relative motion between adjacent fluid layers, and frictional resistance occurs between the fluid layers, which becomes viscous force. Viscosity is a physical data used to measure the size of viscous force. Any fluid has viscosity. In addition, the viscosity of liquids is not fixed. It usually decreases with the increase of temperature and increases with the increase of pressure.

However, if the viscosity is too high and the performance drops significantly, a centrifugal pump is not suitable and a positive displacement pump should be used. Therefore, only by understanding the viscosity of the liquid can you better choose a pump.

Introduction To Centrifugal Pumps

Centrifugal pump is an important equipment for transporting various liquids. It has efficient and stable transport capacity and can meet various needs. It is widely used in mining, agriculture, electric power, chemical and petroleum production, national defense construction, hydropower station water supply, urban pollution treatment and other major industries. Unlike other types of pumps, centrifugal pumps rely on the rotational force generated by an impeller to push fluid through the system. This mechanism is particularly useful when handling viscous liquids, as it helps reduce clogging and minimizes downtime for maintenance and cleaning.

Centrifugal pumps

Working Principle

Centrifugal pumps mainly work by using the centrifugal force generated by the rotation of the impeller in the water. Before starting, the pump casing needs to be filled with the liquid to be transported. After starting, the pump shaft drives the impeller to rotate together, forcing the liquid between the blades to rotate. The liquid in the center of the impeller is thrown toward the outer periphery under the action of inertial centrifugal force and gains energy, causing its static pressure to increase and its flow rate to increase. When the liquid in the center of the impeller is thrown to the outer periphery, a low-pressure area will be generated in the center of the impeller; because the pressure above the liquid level in the storage tank is higher than the pressure at the pump inlet, the liquid is sucked into the center of the impeller. Therefore, the impeller rotates continuously and can continuously suck in and discharge liquid.


  • Their flexibility to handle different viscosities and adaptability make centrifugal pumps a versatile option;
    Centrifugal pumps can be made of corrosion-resistant materials and are suitable for transporting various corrosive liquids;
  • By adjusting the pump’s speed or impeller size, operators can optimize performance for different types of viscous materials;
  • The mechanical structure is simple and reliable, ensuring long-term stable operation, and can be customized according to specific pumping requirements.

Reasons: Using Centrifugal Pumps For Viscous Fluids

1. Centrifugal pumps are highly efficient at handling fluids containing viscosity due to their ability to produce high flow rates and maintain consistent performance.

2. This is particularly beneficial in applications where fluid thickness may impede the pumping process, however centrifugal pumps can effectively overcome this challenge. Perfect for improving the overall efficiency and cost-effectiveness of industrial processes involving viscous materials.

3. Using centrifugal pumps for high viscosity fluids helps minimize the risk of blockages within the system. These pumps are designed for smooth, continuous flow, reducing the chance of any obstructions that could interrupt operations and cause downtime.

4. Centrifugal pumps do not require excessive floor space or complex infrastructure modifications, and they are easy to install and maintain in a variety of industrial environments. This not only improves operational efficiency but also reduces overall costs associated with installation and maintenance.

Centrifugal pumps have proven to be very effective in handling viscous fluids due to their simple design and efficient operation. It can produce high flow rates even when handling thick or viscous liquids, making them ideal for a wide range of industries from food processing to chemical manufacturing. But all kinds of liquids have viscosities. We (Walker) support customized pumps according to your material characteristics. Contact us to get details quickly!