Analysis of Different Butterfly Valve Types

A Comprehensive Guide On All Types Of Butterfly Valve

There are various types of butterfly valves, including centerline butterfly valves, double eccentric butterfly valves, triple eccentric butterfly valves, etc. Each type has differences in structure and performance and is suitable for different working conditions. Medium line butterfly valve has simple structure and low cost, applicable to low pressure and sealing requirements are not high occasions, in some small agricultural irrigation system, the pressure and sealing requirements are relatively low, the medium line butterfly valve can well meet the demand, to realize the control of water flow. Double Eccentric Butterfly Valve has excellent performance in medium-pressure working condition, which can effectively reduce the wear and prolong the service life, and it is widely used in medium-pressure water supply pipeline in the city, which guarantees the stable delivery of water to the residents. Three eccentric butterfly valves can withstand high pressure, high temperature and strong corrosion and other harsh conditions, such as high temperature and high pressure corrosive media transportation pipeline in chemical industry, three eccentric butterfly valves is a reliable choice to ensure the safety and continuity of the production process. At the same time, it is necessary to consider the size of the valve, pressure level, connection and other parameters, as well as the need for special materials or features, such as corrosion resistance, fire resistance and so on.

Centerline butterfly valve key features and applications

The centerline butterfly valve, whose butterfly plate coincides with the centerline of the valve body, has a relatively simple structure. This design makes the valve in the opening and closing process, the butterfly plate and the valve seat friction is more uniform, the sealing performance can be guaranteed to a certain extent. For example, in some low-pressure water supply and drainage systems, such as urban water supply pipeline branches, for the pressure requirements are not high, and the medium is clean water, the centerline butterfly valve by virtue of its low cost, lightweight operation advantages, can well meet the switch and basic flow regulation needs. In the preliminary sedimentation tank of small sewage treatment plant, used to control the flow of water in and out of the center line butterfly valve can also play its role, its simple structure is easy to maintain and overhaul, even in the more severe sewage environment, but also can maintain relatively stable performance, as long as the regular cleaning of the valve seat and the butterfly plate of debris on the valve seat and butterfly plate can maintain a good sealing effect, to protect the normal operation of the system.

Double offset butterfly valve key features and applications

A double offset butterfly valve is a high-performance valve designed for demanding applications, providing superior sealing and durability. The valve’s design includes two offsets from the valve’s centerline, reducing friction during operation and enhancing seal longevity. This feature allows the valve to handle higher pressures and temperatures, making it ideal for industries such as oil and gas, chemical processing, and power generation. The double offset design ensures a bubble-tight shut-off, minimizing leaks and improving efficiency. By incorporating a double offset butterfly valve, businesses can achieve reliable flow control, reduced maintenance costs, and extended service life.

The trajectory of the butterfly plate on the seat of the double eccentric butterfly valve is eccentric, i.e. there are two eccentricities. This unique design allows the butterfly plate to gradually detach from the valve seat during the closing process, which reduces the friction resistance during closing, and at the same time, it can quickly detach from the valve seat during opening, which reduces the operating torque. In medium-pressure heating systems, such as the centralized heating network of the district, hot water medium circulates under a certain pressure, double eccentric butterfly valve can effectively cope with the pressure fluctuations, its good sealing performance can prevent hot water leakage and reduce heat loss, while the longer service life also reduces the maintenance cost and downtime of the system. In the ventilation system of some industrial plants, used to control air flow, double eccentric butterfly valve's fast opening and closing characteristics can timely adjust the ventilation volume to meet the ventilation needs of the production process, and its eccentric structure in the case of frequent operation, but still be able to maintain a stable performance, to ensure the efficient operation of the ventilation system.

Triple offset butterfly valve key features and applications

A triple offset butterfly valve is an advanced valve designed for critical applications, offering exceptional performance and durability. This valve features three offsets: two from the centerline and one from the seating axis, creating a cam-like motion that eliminates friction during operation. This design ensures a tight seal and extends the valve’s lifespan, even in high-pressure and high-temperature environments. Ideal for industries such as oil and gas, petrochemical, and power generation, triple offset butterfly valves provide reliable, zero-leakage shut-off. Implementing these valves can enhance system efficiency, reduce maintenance costs, and ensure safe, long-term operation.

Triple eccentric butterfly valve is further optimized on the basis of double eccentric, the butterfly plate not only has two eccentrics, but also adds a taper eccentric. This structure makes the butterfly valve perform well in harsh working conditions such as high pressure, high temperature and strong corrosion. In the high-pressure pipeline in the petrochemical industry, crude oil or chemical raw materials flow at high temperature and high pressure, the metal hard seal structure of the three eccentric butterfly valve can withstand enormous pressure, and its tighter and tighter sealing characteristics can effectively prevent the media from leaking and ensure production safety. For example, in the crude oil distillation unit of an oil refinery, high temperature and high pressure crude oil steam requires precise control of flow and pressure, and the triple eccentric butterfly valve, with its reliable sealing performance and high temperature and corrosion-resistant materials, is able to operate stably and meet the strict requirements of the production process. In the steam transportation pipeline of thermal power station, the high temperature and high pressure steam puts forward high requirements on the sealing and strength of the valve. The unique design of the triple eccentric butterfly valve enables it to withstand the scouring and pressure impact of high temperature steam, ensuring the safe and stable operation of the power generation system and providing a reliable guarantee for the production of electric power.

The important application value and adaptability of butterfly valves in different segments of the petrochemical industry provide a solid guarantee for the stable production and safe operation of the industry. Choosing a professional valve team to be responsible for usually brings the best results, Weikente Valve has been adhering to the professional technical guidance, high-end technical support, and perfect after-sales service as the standard for you to solve the one-stop purchase needs.