Wafer type butterfly valves are essential components in many industrial systems, known for their compact design, cost – effectiveness, and efficient flow control capabilities. As a supplier of wafer type butterfly valves, I have witnessed the diverse applications and requirements of different industries, and understand well the various types of these valves. In this blog, I will introduce the different types of wafer type butterfly valves, their characteristics, and applications. Wafer Type Butterfly Valve
1. Concentric Wafer Type Butterfly Valves
The concentric wafer type butterfly valve is the most basic and widely used type. The design of this valve is characterized by having the stem centered both axially and radially in the disc. The disc rotates around the stem, and when the valve is fully open, the disc is parallel to the direction of the fluid flow, offering minimal flow resistance.
One of the significant advantages of concentric wafer type butterfly valves is their simplicity. They are relatively easy to manufacture, which makes them cost – effective. This low – cost feature makes them a popular choice for general – purpose applications where accurate flow control is not the prime concern, such as in water supply systems, irrigation, and some non – critical industrial fluid transfer applications.
However, concentric wafer type butterfly valves do have some limitations. Due to the design, the disc is in contact with the seat throughout the opening and closing process, which may cause wear on the seat over time, especially in applications with abrasive fluids. Also, the sealing performance may not be as high as some other types of valves, and they are generally not suitable for high – pressure and high – temperature applications.
2. Double – Eccentric Wafer Type Butterfly Valves
Double – eccentric wafer type butterfly valves, also known as high – performance butterfly valves, address some of the shortcomings of concentric valves. In a double – eccentric design, the stem is offset from the center of the disc both axially and radially. This offset design allows the disc to disengage from the seat as it starts to open, reducing the friction between the disc and the seat during the opening and closing process.
The reduced friction not only improves the service life of the valve but also provides better sealing performance compared to concentric valves. The double – eccentric design enables the valve to achieve a tight seal with less torque, making it suitable for applications with moderate pressure and temperature requirements. These valves are commonly used in chemical processing plants, power generation facilities, and HVAC systems.
In chemical processing plants, double – eccentric wafer type butterfly valves can handle a variety of corrosive and non – corrosive fluids. Their reliable sealing performance prevents leakage of harmful chemicals, ensuring the safety of the production process. In power generation facilities, they are used to control the flow of water, steam, and other working fluids in different parts of the power plant, such as in the cooling water system and the steam turbine bypass system.
3. Triple – Eccentric Wafer Type Butterfly Valves
Triple – eccentric wafer type butterfly valves represent the most advanced and high – performance type in the family of wafer type butterfly valves. In addition to the two offsets in double – eccentric valves, the third eccentricity is introduced by tilting the disc seat cone relative to the pipe axis.
This unique design results in a cam – like movement of the disc, which allows the valve to achieve a metal – to – metal seal. The metal – to – metal seal provides excellent sealing performance, even under high – pressure and high – temperature conditions. Triple – eccentric wafer type butterfly valves can withstand extreme pressures and temperatures, making them suitable for critical applications in the oil and gas industry, such as in pipelines for transporting crude oil, natural gas, and refined petroleum products.
Another advantage of triple – eccentric wafer type butterfly valves is their excellent fire – safe performance. In the event of a fire, the metal – to – metal seal remains intact, preventing the leakage of flammable fluids and reducing the risk of a major fire or explosion. These valves are also widely used in the petrochemical industry, where they are used to control the flow of various chemicals and products in high – pressure and high – temperature reactors and pipelines.
4. Resilient – Seated Wafer Type Butterfly Valves
Resilient – seated wafer type butterfly valves are designed with a rubber or elastomeric seat. This type of valve is known for its excellent sealing performance, especially in low – pressure applications. The resilient seat can conform to the shape of the disc, ensuring a tight seal even with small irregularities on the disc surface.
Resilient – seated wafer type butterfly valves are commonly used in water and wastewater treatment plants. In water treatment plants, they are used to control the flow of water in different treatment processes, such as filtration, sedimentation, and disinfection. In wastewater treatment plants, they can handle the flow of sewage and other wastewater, and their corrosion – resistant rubber seats can withstand the harsh chemical environment of wastewater.
The maintenance of resilient – seated wafer type butterfly valves is relatively simple. If the seat is damaged, it can be easily replaced, which reduces the maintenance cost and downtime of the system. However, the temperature and chemical resistance of the resilient seat are limited. Therefore, they are generally not suitable for applications with high – temperature or highly corrosive fluids.
5. High – Performance Resilient – Seated Wafer Type Butterfly Valves
High – performance resilient – seated wafer type butterfly valves combine the advantages of resilient – seated valves and high – performance valve designs. They are designed with advanced materials and manufacturing techniques to improve the performance and durability of the valve.
These valves can handle higher pressures and temperatures compared to traditional resilient – seated valves. They are often used in industrial applications where a reliable and cost – effective flow control solution is required, such as in the food and beverage industry, pharmaceutical industry, and some light chemical industries.
In the food and beverage industry, high – performance resilient – seated wafer type butterfly valves are used to control the flow of various liquids, such as milk, juice, and beer. The resilient seat material is usually food – grade, ensuring that the valve meets the strict hygiene requirements of the industry. In the pharmaceutical industry, these valves are used to control the flow of drugs and other pharmaceutical products, and their high – performance design ensures accurate flow control and reliable sealing.
Why Choose Our Wafer Type Butterfly Valves?
As a professional wafer type butterfly valve supplier, we offer a wide range of valve types to meet the diverse needs of different industries. Our valves are manufactured using high – quality materials and advanced production processes, ensuring their reliability and durability.
We have a team of experienced engineers and technicians who can provide technical support and solutions according to your specific requirements. Whether you need a concentric wafer type butterfly valve for general – purpose applications or a triple – eccentric wafer type butterfly valve for high – pressure and high – temperature applications, we can offer you the most suitable product.
PTFE Lined Butterfly Valve In addition, we provide excellent after – sales service. We can help you with valve installation, maintenance, and repair, ensuring that your valve system operates smoothly. If you have any questions or need to purchase wafer type butterfly valves, please feel free to contact us. We are looking forward to establishing a long – term and mutually beneficial cooperation with you.
References
- ASME B16.34 – Valves – Flanged, Threaded, and Welded End.
- API 609 – Butterfly Valves, Double – Flanged, Lug – Type, and Wafer – Type.
- ISO 5752 – Flanged and Butt – Welding End Metal Butterfly Valves.
Tianjin Dingruite Valve MFG. Co., Ltd.
Tianjin Dingruite Valve MFG. Co., Ltd. is one of the most professional wafer type butterfly valve manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale wafer type butterfly valve for sale here from our factory. Good service and competitive price are available.
Address: No.18 Juhai Road, Economic and Technological Development Zone, Jinghai District, Tianjin, China.
E-mail: sales@drtvalve.com
WebSite: https://www.drtvalve.com/
