What role has the triple eccentric hard seal butterfly valve played in petrochemical industry?
Triple eccentric hard seal butterfly valves play a very important role in the petrochemical industry. The triple eccentric hard seal butterfly valve can accurately cut off the working condition when there is a malfunction, which greatly prevents the occurrence of danger. Secondly, the triple eccentric hard seal butterfly valve is also very simple to operate and has strong stability.
The three eccentric hard seal butterfly valve is designed using the three-dimensional eccentric principle, which idealizes the spatial motion trajectory of the sealing surface. The sealing surfaces are free from friction and interference with each other, and the sealing material is selected appropriately, thus ensuring the sealing, corrosion resistance, high temperature resistance, and wear resistance of the butterfly valve. Its main characteristics are as follows:
1. Small opening torque, flexible and convenient, labor-saving and energy-saving.
2. The three-dimensional core structure makes the butterfly plate tighter and tighter, ensuring reliable sealing performance and achieving no leakage.
3. High pressure resistance, corrosion resistance, wear resistance, long service life, etc.
Compared with gate valves, butterfly valves have the characteristics of short opening and closing time, small operating torque, small installation space, and light weight. Taking DN1000mm as an example, the butterfly valve is about 2t and the gate valve is about 35t. The butterfly valve is easy to combine with various driving devices and has good durability and reliability. Because triple eccentric hard seal butterfly valves have significant advantages compared to globe valves, ball valves, and gate valves, they have been successfully applied in many occasions in the petrochemical industry.
Eccentric butterfly valves integrate regulation and shut-off (achieving zero leakage), and have been successfully applied in polyethylene plants. The temperature regulating circuit of the reactor cooling water in the polyethylene device is an important component of the device, and whether the temperature regulating circuit can operate smoothly directly determines whether the entire polyethylene device can operate safely and smoothly. The temperature regulating water pipeline is of large caliber.
Under normal operating conditions, the triple eccentric hard seal butterfly valve, due to its high regulation ratio, is used as a regulating valve and is more stable and reliable than ordinary regulating valves. When interlocking occurs, the triple eccentric hard seal butterfly valve can also play a cutting role and completely cut off (zero leakage). From the practical application situation, it not only saves investment costs, but also has a particularly stable control.
The coke cleaning valve at the outlet of the ethylene cracking furnace is a type of valve in the petrochemical industry that has strict operating conditions. Carbon particles in the process medium may accumulate on the sealing surface of the valve, causing the sealing surface to bite and prevent the valve from opening and closing normally, and even shortening the service life of the valve. Compared with other types of valves, triple eccentric hard seal butterfly valves have become an ideal choice due to their unique structural characteristics.
