Analysis of the Suitability of Butterfly Valve as Regulating Valve
Date: 2025-06-15 Categories: Valve Knowledge Views: 7349
Excerpt:
This paper evaluates the suitability of butterfly valves as regulating valves in fluid management within the industrial and building sectors. The advantages of butterfly valves include their simple design, compact size, and light weight, which facilitate installation and maintenance. They also feature low operating torque, fast response times, and low flow resistance, thereby reducing energy consumption and costs. However, they suffer from insufficient regulating accuracy, non-linear flow characteristic curves, and a tendency to cause flow fluctuations at small opening angles. Additionally, long-term use may lead to seal degradation and leakage. Therefore, butterfly valves are suitable for applications where regulating accuracy is not critical, flow variations are wide, and cost-effectiveness and convenience are prioritized (such as ventilation or water supply and drainage systems); however, for applications requiring high precision (such as chemical production), ball valves or precision regulating valves are recommended.
In fluid management applications within the industrial and construction sectors, the selection of Regulating Valve is critical. To determine whether a Butterfly Valve is suitable for use as a regulating valve, the following factors must be comprehensively considered.
The primary advantage of butterfly valves lies in their regulating capabilities. Their simple design, compact size, and light weight make them easy to install and maintain. During operation, the disc rotates around its axis, requiring minimal operating torque and enabling rapid response to regulating commands to provide preliminary regulating of fluid flow. Furthermore, butterfly valves have low flow resistance, which helps reduce energy consumption and lower operating costs.
However, when used as regulating valve, butterfly valves offer relatively low regulating accuracy. Their flow characteristic curves are not ideally linear; particularly at small opening positions, their regulating performance is poor, potentially causing excessive flow fluctuations and making precise flow regulating difficult to achieve. Furthermore, long-term use and frequent regulation may degrade the sealing performance of the butterfly valve, leading to leakage issues, which in turn affect the regulation effectiveness and system stability.
In specific applications, if the requirements for regulation accuracy are not high, the range of flow variation is wide, and there are high demands on valve cost, installation space, and ease of operation, butterfly valves can be a suitable choice for regulating valves. For example, in fields such as ventilation systems and water supply and drainage systems, butterfly valves are sufficient to meet basic regulating requirements. However, in applications with extremely high demands for flow regulating accuracy—such as precise metering in chemical production and high-precision fluid transfer—butterfly valves may fail to meet the required standards. In such cases, other types of regulating valves, such as ball valves or precision regulating valves, should be considered.
