What is an eccentric butterfly valve?

Valves are an essential component in industrial applications. They control the flow of liquids from one vessel to another. Valves also help to start or stop the flow of any liquid, and valves need to work properly to prevent leaks and to properly control the flow of liquid. There are many valves on the market. Eccentric butterfly valves play a major role in this and are explained next.

Although it is said that eccentric butterfly valves play a major role in valves, I have a doubt? -Why is he so important:.

Let's start with three advantages of eccentric butterfly valves.

Eccentric butterfly valves require very little space in the piping system.

Reduced elastomeric strain in the sealing area due to the double eccentric valve bearing, resulting in less maintenance work.

They flow more favourably into the flapping disc over the entire pivoting range than closing devices placed vertically in the pipeline.



Last but not least, they have a smaller driving torque, especially in the case of larger nominal diameters.

But what are its applications?

Applications of eccentric butterfly valves

Eccentric butterfly valves are used in inlet systems, cooling water systems, filtration systems and industrial waste water in the power industry, chemical and petrochemical waste water plants, the steel industry, etc.


The eccentric butterfly valve is further improved on the basis of the single eccentric butterfly valve. Its structure is characterised by the eccentricity of the stem axis from the centre of the butterfly plate and the centre of the valve body.


The eccentric action allows the butterfly plate to break away from the seat immediately after the valve is opened, greatly eliminating unnecessary over squeezing and scratching between the butterfly plate and the seat, reducing opening resistance, reducing wear and tear and improving the service life of the improved valve seat. The scraper is greatly reduced, while the eccentric butterfly valve also allows the use of metal seats, improving the application of butterfly valves in high temperature areas. However, due to its sealing principle for the position sealing structure, that is, the sealing surface of the butterfly plate and the valve seat are in line contact, and the elastic deformation generated by the butterfly plate squeezing the valve seat produces the sealing effect.


The main features of the eccentric butterfly valve

① Reasonable design, compact structure, easy to install and dismantle, easy maintenance.


② The eccentric structure reduces the friction of the sealing ring and prolongs the service life of the valve.


③The valve plate adopts "T" type structure, and the sealing surface is a line seal.


④ Complete sealing, zero leakage.


⑤ Replacement of the valve plate seal, "O" ring, butterfly plate, shaft and other materials, can be applied to a variety of media and different temperatures.


In summary

This article provides a comprehensive explanation of the eccentric butterfly valve, including the advantages, features and application areas of the eccentric butterfly valve, and I hope it will help you!