Views: 0 Author: Site Editor Publish Time: 2025-06-05 Origin: Site
I. Basic Structure and Working Principle of Triple Eccentric Lug Butterfly Valves
The TRIPLE ECCENTRIC LUG BUTTERFLY VALVE is a high-performance BUTTERFLY VALVE product. Its core design lies in the unique triple eccentric structure. This structure completely eliminates the friction between the sealing surfaces during the opening and closing of the valve by offsetting the valve shaft from the center line of the sealing surface, deviating from the center line of the pipeline, and forming an oblique conical surface. Specifically, the triple eccentric structure enables the disc to immediately separate from the valve seat sealing surface at the moment of opening and only contact and press tightly against the valve seat sealing surface at the moment of closing, thus achieving zero-friction opening and closing.
In addition, the TRIPLE ECCENTRIC LUG BUTTERFLY VALVE adopts a full-metal sealing design. The sealing surface usually adopts the Stellite alloy surfacing welding technology. This design not only improves the sealing performance but also enhances the durability of the valve under harsh working conditions such as high temperature and high pressure.
II. Performance Characteristics of 20" 150LB J-VALVES Triple Eccentric Lug Butterfly Valves
(1) Excellent Sealing Performance
The sealing performance of the triple eccentric lug butterfly valve is one of its most prominent advantages. Due to the absence of friction between the sealing surfaces, the valve can maintain extremely high sealing reliability during the opening and closing processes and can achieve zero leakage even under the condition of frequent opening and closing. This sealing performance not only meets the sealing requirements under harsh working conditions but also greatly reduces the maintenance cost.
(2) High Temperature and High Pressure Resistance
The 20" 150LB J-VALVES triple eccentric lug butterfly valve can withstand pressures up to 150 pounds class and has an excellent performance in the temperature range. It can withstand temperatures as low as -196 °C and as high as 850 °C. This wide range of applicable temperatures and pressures enables it to adapt to various extreme working conditions, such as the transportation of high-temperature and high-pressure media in industries like chemical, petroleum, and electric power.
(3) Long Service Life
Since the triple eccentric structure eliminates the mechanical wear between the sealing surfaces, the service life of the valve has been significantly extended. In addition, the valve seat and sealing ring of the valve are made of metal materials and have undergone surface hardening treatment, so they can maintain good sealing performance even under the condition of frequent opening and closing.
(4) Bi-directional Sealing
The triple eccentric lug butterfly valve has a bi-directional sealing function. No matter which direction the medium flows, the valve can maintain excellent sealing performance. This characteristic enables the valve to be installed without considering the flow direction limitation and improves the installation flexibility.
(5) Fire Safety
The full-metal sealing structure endows the triple eccentric lug butterfly valve with inherent fireproof characteristics, which complies with fireproof standards such as API 607. This characteristic is particularly important for applications in flammable and explosive environments such as petrochemical industry and can effectively prevent the occurrence of fire accidents.
III. Application Fields of 20" 150LB J-VALVES Triple Eccentric Lug Butterfly Valves
(1) Petrochemical Industry
In the petrochemical field, the 20" 150LB J-VALVES triple eccentric lug butterfly valve is widely used in crude oil transportation, the control of high-temperature and high-pressure media in the oil refining process, and the production process of chemical products. Its excellent sealing performance and high temperature and high pressure resistance can effectively prevent the leakage of media and ensure the safety and stability of the production process.
(2) Electric Power Industry
In the electric power industry, especially in the fields of thermal power and nuclear power, the triple eccentric lug butterfly valve can be used in key parts such as steam pipelines and cooling water systems. Its bi-directional sealing function and high temperature and high pressure resistance can meet the strict requirements of the power system for valves.
(3) LNG Industry
The LNG (liquefied natural gas) industry has extremely high requirements for the low-temperature performance of valves. The 20" 150LB J-VALVES triple eccentric lug butterfly valve can maintain good sealing performance at extremely low temperatures and is suitable for pipeline control in the storage and transportation process of LNG.
IV. Comparative Analysis between Triple Eccentric Lug Butterfly Valves and Other Butterfly Valves
In order to more intuitively demonstrate the performance advantages of the 20" 150LB J-VALVES triple eccentric lug butterfly valve, we will compare its performance parameters with those of other common butterfly valve types in the form of a table.
| Parameters/Performance Indicators | Triple Eccentric Lug Butterfly Valve | Double Eccentric Butterfly Valve | Single Eccentric Butterfly Valve | Centerline Butterfly Valve |
Sealing Performance | Zero leakage, zero-friction opening and closing | Low leakage, with friction | Medium leakage, with friction | Low leakage, with friction |
High Temperature and High Pressure Resistance | -196 °C ~ 850 °C, 150LB ~ 2500LB | -40 °C ~ 300 °C, PN1.0 ~ PN2.5 | -20 °C ~ 200 °C, PN1.0 ~ PN1.6 | -20 °C ~ 150 °C, PN0.6 ~ PN1.0 |
Service Life | Long, without wear | Medium, with wear | Short, with wear | Short, with wear |
Bi-directional Sealing | Supported | Not supported | Not supported | Not supported |
Fireproof Performance | Complies with API 607 | General | General | General |
Applicable Media | Water, steam, oil products, corrosive media | Water, steam, oil products | Water, steam, oil products | Water, air |
Regulation Performance | Regulation ratio up to 100:1 | Low regulation ratio | Low regulation ratio | Low regulation ratio |
It can be seen from the above table that the TRIPLE ECCENTRIC LUG BUTTERFLY VALVE is superior to other types of butterfly valves in terms of sealing performance, high temperature and high pressure resistance, service life, bi-directional sealing function, and fireproof performance. These advantages enable it to perform excellently under harsh working conditions and meet the high requirements of industrial users for valves.
V. Summary
The 20" 150LB J-VALVES TRIPLE ECCENTRIC LUG BUTTERFLY VALVE, with its excellent sealing performance, high temperature and high pressure resistance, long service life, and bi-directional sealing function, performs excellently under harsh working conditions and is widely used in industries such as petrochemical, electric power, and LNG. Through the comparative analysis with other types of butterfly valves, we can clearly see the performance advantages of the TRIPLE ECCENTRIC LUG BUTTERFLY VALVE. When selecting valves, users should make comprehensive considerations based on specific working condition parameters, installation conditions, and maintenance requirements to ensure the selection of the most suitable valve products.
In the industrial field, the choice of valves not only affects the operating efficiency of the system but also directly relates to production safety. The 20" 150LB J-VALVES triple eccentric lug butterfly valve, with its high performance and high reliability, provides an ideal solution for users and can achieve long-term stable operation under harsh working conditions.
