B62 Butterfly Valve: Comprehensive Understanding and Application Analysis
Butterfly valve is an important pipeline control device. It is widely used in various industrial systems because of its simple structure, convenient operation and powerful flow regulation function. This article will introduce the structural principle, classification, sealing material, connection method, characteristics, application scenarios, design considerations and operating procedures of B62 butterfly valve in detail, aiming to provide readers with a comprehensive and in-depth guide manual.
1. Structural principle of B62 butterfly valve
B62 butterfly valve is a valve that realizes opening and closing or flow regulation by rotating a disc-shaped butterfly plate. Its core components include valve body, butterfly plate, valve stem and sealing ring. The butterfly plate is used as an opening and closing part, and can be fully opened or fully closed by rotating within 90° around the valve axis. This design makes the butterfly valve have the characteristics of fast opening and closing and small driving force, which is especially suitable for large pipe diameter scenarios.
The sealing performance of the butterfly valve mainly depends on the sealing ring. The material and design of the sealing ring determine the applicable working conditions and sealing effect of the valve. The B62 butterfly valve ensures good contact and sealing between the butterfly plate and the valve seat through precise design and manufacturing, thus meeting the needs of various complex working conditions.
2. Classification of B62 butterfly valves
According to the different sealing structures, the B62 butterfly valve can be divided into center seal (concentric), single eccentric, double eccentric and triple eccentric butterfly valves.
Center seal butterfly valve: The butterfly plate and the valve seat always remain concentric during the rotation process, which is suitable for low-pressure, normal temperature, non-corrosive medium pipeline systems.
Single eccentric butterfly valve: The butterfly plate has an eccentric amount relative to the valve seat during the rotation process. This design improves the sealing performance and is suitable for medium-pressure, normal temperature, corrosive medium pipeline systems.
Double eccentric butterfly valve: The butterfly plate not only has an eccentric amount during the rotation process, but also further improves the sealing performance by changing the contact method between the butterfly plate and the valve seat. It is suitable for high-pressure, high-temperature, corrosive medium pipeline systems.
Three-eccentric butterfly valve: The three-eccentric butterfly valve realizes metal hard sealing through the design of three eccentric amounts. It is resistant to high temperature and high pressure and is suitable for pipeline systems under extreme working conditions.
3. Sealing material of B62 butterfly valve
The sealing material of B62 butterfly valve can be divided into soft seal and metal hard seal according to the characteristics of the medium and working conditions.
Soft seal: It uses non-metallic materials such as rubber or polytetrafluoroethylene, which has good sealing but weak temperature resistance. It is suitable for pipeline systems with normal temperature, low pressure and corrosive media. Soft seal butterfly valve has the advantages of simple structure, easy operation and low price. It is a common valve type in industrial applications.
Metal hard seal: It uses metal materials such as stainless steel and is suitable for high temperature, high pressure and corrosive media. Metal hard seal butterfly valve has the advantages of high temperature resistance, high pressure resistance, corrosion resistance and long life. It is an ideal choice under extreme working conditions.
4. Connection methods of B62 butterfly valve
The connection methods of B62 butterfly valve can be divided into four types according to the needs of the pipeline system: wafer type, flange type, lug type and welding type.
Wafer type: The wafer type butterfly valve is small in size, light in weight, easy to install, and suitable for pipeline systems with limited space.
Flange type: The flange type butterfly valve is easy to disassemble and maintain, and is suitable for pipeline systems that need to replace the sealing ring frequently.
Lug type: The lug type butterfly valve is connected to the pipeline system through the lug, and is suitable for large pipeline systems.
Welding type: The welded butterfly valve is connected to the pipeline system through welding, with good sealing performance, and is suitable for pipeline systems with high pressure, high temperature and corrosive media.
5. Characteristics of B62 butterfly valve
The B62 butterfly valve has the characteristics of simple structure, convenient operation, and powerful flow regulation function, which makes it widely applicable in industrial applications.
Simple structure: B62 butterfly valve is mainly composed of valve body, butterfly plate, valve stem and sealing ring. It has simple structure, light weight, easy installation and maintenance.
Easy operation: B62 butterfly valve has intuitive opening and closing action. It only needs to rotate 90° to complete the switch operation. The operating torque is small, which is particularly suitable for manual operation and easy to operate and maintain.
Flow regulation function: B62 butterfly valve is widely used in large-caliber regulation field. It has good flow regulation characteristics and can realize precise control of medium flow in pipeline.
Corrosion resistance: B62 butterfly valve uses high-performance elastic materials as seals to ensure good sealing effect. At the same time, the use of synthetic rubber and polymer materials makes the butterfly valve have good corrosion resistance and is suitable for various harsh environments.
6. Application scenarios of B62 butterfly valve
Due to its unique structure and performance characteristics, B62 butterfly valve is widely used in various industrial fields.
Chemical industry: As a commonly used regulating valve, B62 butterfly valve is widely used in chemical reaction equipment and pipelines, which can effectively prevent chemical leakage and ensure production safety.
Food and medicine fields: The application of B62 butterfly valve in the food and medicine fields ensures the hygiene and safety of food and medicine, is simple to operate, and meets the requirements of rapid response.
Sewage treatment field: The application of B62 butterfly valve in the sewage treatment field effectively prevents sewage leakage and odor emission, ensures sewage treatment effect, and improves environmental quality.
Power industry: B62 butterfly valve has significant advantages in the control of high-temperature media such as smoke and air ducts and gas pipelines in power plants. Its temperature resistance exceeds 500℃, and it is an indispensable valve type in the power industry.
7. Design considerations of B62 butterfly valve
When designing B62 butterfly valve, it is necessary to comprehensively evaluate factors such as medium characteristics, pressure level, temperature range and service life.
Medium characteristics: including the corrosiveness of the medium, the content of particulate matter, etc. These factors will directly affect the selection of valve materials and the requirements of sealing performance.
Pressure level: B62 butterfly valve is suitable for low-pressure, medium-pressure and high-pressure systems. When designing, it is necessary to select the appropriate valve type according to the pressure level of the pipeline system.
Temperature range: The operating temperature range of B62 butterfly valve is wide, from -196℃ to above 1000℃. When designing, it is necessary to select the appropriate sealing ring material and valve body material according to the medium temperature.
Service life: The service life of B62 butterfly valve depends on the material, manufacturing process and use environment of the valve. These factors need to be comprehensively considered during design to ensure the long-term stable operation of the valve.
8. Operation procedures of B62 butterfly valve
In order to ensure the safe and reliable operation of B62 butterfly valve, the following operation procedures are specially formulated:
Inspection and preparation: Before operation, it is necessary to check whether the model and specifications of B62 butterfly valve meet the design requirements, and whether the valve body, valve cover, valve stem and other components are intact. At the same time, check whether the valve inlet and outlet pipes are clean and free of foreign matter, ensure that the power supply voltage is stable, and the operation control equipment is normal.
Opening operation: Rotate the handle of the control valve to the open position and observe whether the valve opens smoothly. During the opening process, pay attention to the degree of valve opening to ensure that the valve is fully open to avoid medium leakage.
Closing operation: Rotate the handle of the control valve to the closed position and observe whether the valve closes smoothly. During the closing process, pay attention to the degree of valve closing to ensure that the valve is fully closed to prevent medium leakage.
Flow adjustment: Adjust the flow as needed and rotate the handle of the control valve to the appropriate position. During the adjustment process, it is necessary to observe the degree of valve opening to ensure that the valve opening meets the requirements and achieve accurate flow control.
Safety Precautions: When operating the B62 butterfly valve, it is strictly forbidden to use excessive force to avoid damaging the valve components. Operators should wear protective equipment, such as gloves, glasses, etc. to avoid accidents. At the same time, it is strictly forbidden to put body parts into the valve to prevent accidents. After the operation, the handle of the control valve should be restored to its original position.
Conclusion
As an important pipeline control device, the B62 butterfly valve is widely used in various industrial systems due to its simple structure, convenient operation and powerful flow regulation function. By deeply understanding the structural principle, classification, sealing material, connection method, characteristics, application scenarios, design considerations and operating procedures of the B62 butterfly valve, we can better select and use the B62 butterfly valve to ensure its safe and reliable operation in the pipeline system. With the advancement of technology and the in-depth research on sealing materials, the sealing performance and pressure bearing capacity of the B62 butterfly valve are constantly improving, and its application under extreme working conditions will become more and more extensive. In the future, the B62 butterfly valve will continue to develop in the direction of high technology, high parameters, strong corrosion resistance and long life to meet the supporting needs of various industrial devices.
Post time: Apr-13-2025