Hard sealed butterfly valve

High performance pneumatic butterfly valves are a common type of valve with a double eccentric structure used to control fluid flow and pressure. It consists of a valve body, a valve cover, a valve shaft, a butterfly plate, and a pneumatic actuator. The following is a detailed explanation and description of high-performance pneumatic butterfly valves:

1. Structural composition: High performance pneumatic butterfly valves are mainly composed of the following components: - Valve body and valve cover: usually made by casting or forging processes, with sufficient strength and rigidity- Valve shaft: used to connect pneumatic actuators and butterfly plates to achieve the opening and closing action of valves- Butterfly plate: located inside the valve body, connected to the pneumatic actuator through the valve shaft. The butterfly plate can rotate as needed to change the channel area for medium circulation- Pneumatic actuator: includes components such as pneumatic piston, cylinder, and air control valve, used to control the opening and closing of valves. 2. Working principle: High performance pneumatic butterfly valves control the opening and closing of the valve through pneumatic actuators to achieve flow regulation of the medium. When the pneumatic actuator applies pressure, the valve shaft is connected to the butterfly plate, and the butterfly plate adjusts the opening of the valve by rotating. When the butterfly plate is opened, the medium can smoothly pass through the passage of the valve body; When closed, the butterfly plate is in close contact with the valve seat, preventing the medium from flowing through. By adjusting the pressure of the pneumatic actuator, the opening of the valve can be precisely controlled to achieve fluid regulation and control. 3. Features: - Quick opening and closing: High performance pneumatic butterfly valves have the characteristics of quick opening and closing, easy operation, and can achieve rapid opening and closing of the valve by applying or releasing pressure through the pneumatic actuator- Good throttling performance: The butterfly plate adjusts the area of the medium channel through rotation, which has good throttling performance and can achieve precise control of fluid flow rate- High temperature and corrosion resistance: High performance pneumatic butterfly valves can be made of materials that are resistant to high temperatures and corrosion, suitable for controlling high temperature and corrosive media, ensuring the reliability and long service life of the valve- Low pressure drop: Due to the structural design of the butterfly plate, high-performance pneumatic butterfly valves have lower pressure loss and fluid resistance, which can reduce system energy consumption- Reliable sealing: The contact area between the butterfly plate and the valve seat is large, and the valve seat is made of elastic material, which has good sealing performance and can prevent medium leakage. 4. Application areas: High performance pneumatic butterfly valves are widely used in fluid control systems in petroleum, chemical, power, metallurgy, water treatment and other fields. It is suitable for flow regulation and cutoff control under different working conditions such as conventional media, corrosive media, and high-temperature media. In summary, high-performance pneumatic butterfly valves have the characteristics of fast opening and closing, good throttling performance, high temperature and corrosion resistance, low pressure drop, and reliable sealing. It plays an important role in fluid control in the industrial field, meeting the flow regulation requirements under different working conditions, ensuring the safe operation and stability of the system. When selecting high-performance pneumatic butterfly valves, the material, size, and actuator selection of the valve should be comprehensively considered based on specific process requirements and application environments to achieve the best control effect and economic benefits.