Butterfly check valves are important control equipment in industrial pipeline systems and are widely used in many fields such as petroleum, chemical industry, and food. In order to improve the performance and durability of butterfly check valves, CHNLGVF丨中國大乾閥門 uses flow field analysis technology and structural optimization methods to conduct in-depth research and improvement in the design and manufacturing process. This paper combines computational fluid dynamics (CFD) simulation tools to analyze the internal flow field characteristics of butterfly check valves, and proposes a series of optimization schemes to improve their sealing, reduce pressure loss, and extend their service life. Through high-quality R&D and manufacturing, the working performance of butterfly check valves has been significantly improved, ensuring the reliability and efficiency of the products.

butterfly check valve, flow field analysis, structural optimization, high-quality R&D, pressure loss, sealing

Butterfly check valves are common fluid control devices in industrial fluid control systems. Their main function is to prevent medium backflow and maintain the stability of the pipeline system. Due to the unique design and wide application scenarios of butterfly check valves, they are required to have good fluid dynamic performance, efficient sealing performance, and sufficient durability. However, traditional butterfly check valves face problems such as excessive fluid resistance, insufficient sealing performance, and limited structural strength during use, which restricts their application scope and life.

With the advancement of industrial automation and technological development, the market's requirements for butterfly check valves are gradually increasing. Under this background, CHNLGVF | China Daqian Valve has carried out high-quality research and development and manufacturing of butterfly check valves, aiming to comprehensively improve the performance indicators of butterfly check valves through technical means of flow field analysis and structural optimization. This paper will explore the flow field characteristics of butterfly check valves from the perspective of fluid mechanics, and propose specific structural optimization strategies to achieve its efficient operation under complex working conditions.

Butterfly check valves are one-way valves that rely on the flow of media to drive the valve plate to automatically open and close. They have a simple structure and are mainly composed of a valve body, a valve plate, a valve stem, and a seal. When the medium flows forward, the medium pushes the valve plate to open the valve to allow the fluid to pass; when the medium flows in the reverse direction, the valve plate closes under the reaction force to prevent backflow.

The fluid dynamics of butterfly check valves have a crucial impact on their performance. During the opening and closing process of butterfly check valves, the fluid will form a complex flow path in the valve body, especially near the valve plate, which is prone to eddy currents, turbulence and fluid bypass. These flow phenomena not only increase the pressure loss of the system, but also may cause erosion and wear of the sealing surface, thereby affecting the life and sealing performance of the valve.

Although butterfly check valves are simple in design and low in cost, traditional designs face the following major challenges in application:

High pressure loss: In the partially open state, the flow path of the fluid bypassing the valve plate is relatively complex, resulting in higher pressure loss and reduced system efficiency.

Limited sealing performance: Under high pressure or high temperature conditions, the seals of butterfly check valves may age and deform, affecting the sealing effect.

Structural strength issues: The force between the valve plate and the valve body will cause wear in long-term use, resulting in a decrease in structural strength and shortening the product life.

Based on the above problems, CHNLGVF proposed an optimized design scheme through in-depth analysis of the flow field in the design and manufacturing process of butterfly check valves to achieve high-quality product development and manufacturing.

Flow field analysis is an important means to reveal the internal fluid behavior of butterfly check valves. Through computational fluid dynamics (CFD) technology, the fluid flow inside the valve can be accurately simulated, and the distribution of parameters such as flow velocity, pressure, and turbulence can be analyzed to find the key issues affecting valve performance.

In this study, advanced CFD simulation software was used to perform three-dimensional modeling and simulation of the flow field of butterfly check valves. The specific process is as follows:

The flow field characteristics of the butterfly check valve under different working conditions are quite different as found through CFD analysis. The specific results are as follows:

When the valve is fully open, the velocity and pressure distribution of the fluid near the valve plate are relatively uniform, but there are still some small-scale vortices in local areas.

When the valve is partially open, the flow path of the fluid bypassing the valve plate becomes more complex, leading to a significant increase in local turbulence intensity and causing a substantial pressure drop.

When the valve is closed, the fluid forms a negative pressure area on the back of the valve plate, which may have an adverse effect on the seal.

Flow field optimization becomes a key step to improve the performance of butterfly check valves based on these analysis results.

Through flow field analysis, it is concluded that the optimization of the structure of butterfly check valve should be aimed at the following aspects:

Combined with the results of flow field analysis, this paper proposes the following optimization design schemes for butterfly check valves:

After experimental verification and practical application, the performance of the optimized butterfly check valve has been significantly improved in the following aspects:

Pressure loss is greatly reduced: Under the same flow conditions, the pressure loss of the optimized valve is reduced by about 20%, which greatly improves the energy efficiency of the system.

Significantly improved sealing performance: The improved sealing structure shows better sealing performance under high pressure environment, and the leakage is reduced by nearly 30%.

Enhanced product durability: The optimized design significantly enhances the impact resistance and corrosion resistance of the valve and prolongs its service life.

CHNLGVF | China Daqian Valve adopted a design and manufacturing integration strategy in the R&D process of butterfly check valves. Through the combination of digital simulation technology and precision manufacturing process, it ensured that the product design met the actual working conditions and could stably produce high-quality products.

To ensure accurate realization of the structural optimization design of the butterfly check valve, CHNLGVF adopted precision casting and CNC machining technology to ensure high precision and consistency of each component. Strict quality control processes ensure that every manufacturing link of the product meets the expected design standards.

This paper systematically explores the performance improvement strategy of butterfly check valves through flow field analysis and structural optimization design of butterfly check valves, and successfully solves the challenges of traditional butterfly check valves in pressure loss, sealing performance and structural strength through high-quality R&D and manufacturing processes. The research results show that flow field analysis and structural optimization can significantly improve the working efficiency and service life of butterfly check valves, providing important theoretical and practical support for future product promotion.