The Butterfly Valve: Advantages and Disadvantages

A butterfly valve is a type of valve that is used to control the flow of fluid through a pipe. It operates by using a disc-type opening and closing part that rotates back and forth about 90° to open, close and adjust the fluid channel.

One of the main advantages of butterfly valves is their simple structure, small size, and light weight. They also have low consumables, making them especially useful in large-diameter valves. In addition, they have a rapid opening and closing feature and a small flow resistance coefficient. They can be used in media with suspended solid particles and depending on the strength of the sealing surface, they can also be used in powdery and granular media. Butterfly valves can be used for two-way opening, closing, and adjustment of ventilation and dust removal pipelines. Due to these advantages, they are widely used in gas pipelines and waterways in various industries such as metallurgy, light industry, electric power, and petrochemical systems.

However, there are some disadvantages to using butterfly valves. The flow adjustment range is not large and when the opening reaches 30%, the flow will increase to more than 95%. Additionally, due to the limitations of the structure and sealing material of the butterfly valve, it is not suitable to be used in high-temperature and high-pressure pipeline systems. The general working temperature is below 300℃ and below PN40 (6~40). Furthermore, the sealing performance is worse than that of ball valves and globe valves, so it is used in places where sealing requirements are not very high.

Overall, butterfly valves have their advantages and disadvantages, making them suitable for certain applications and not for others. It is important to consider these factors when deciding whether to use a butterfly valve in a particular system.

Post time: Jan-31-2024