Triple eccentric metal seal butterfly valve plays an important role in petrochemical industry. Triple eccentric metal seal butterfly valve can accurately cut off the working condition in case of failure, which greatly prevents the occurrence of danger. Secondly, three eccentric metal seal butterfly valve operation is also very simple, and it has a strong stability.

Triple eccentric metal sealing butterfly valve is designed based on three-dimensional eccentric principle, which makes the space movement track of sealing surface idealized. There is no friction and interference between sealing surfaces. In addition, proper selection of sealing materials ensures the sealing performance, corrosion resistance, high temperature resistance and wear resistance of butterfly valve. The main features of triple eccentric metal seal butterfly valve 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. Its sealing performance is reliable and no leakage is achieved.

3. High pressure resistance, corrosion resistance, wear resistance, long service life, etc.

Compared with gate valve, butterfly valve has the characteristics of short opening and closing time, small operating torque, small installation space and light weight. Taking the DN 1000mm as an example, the butterfly valve is about 2T and the gate valve is about 35t. The butterfly valve is easy to be combined with various driving devices, so it has good durability and reliability. Because of the three eccentric hard seal butterfly valve and stop valve, ball valve, gate valve has significant advantages, so in the petrochemical industry in many occasions, triple eccentric hard seal butterfly valve has been successfully applied.The eccentric butterfly valve integrates regulation and cut-off (realizing zero leakage), and has a successful typical application in polyethylene plant. The reactor cooling water temperature regulation loop of polyethylene plant is an important part of the plant. Whether the temperature regulation loop can run smoothly directly determines whether the whole polyethylene plant can run safely and smoothly. The temperature regulating water pipe is of large diameter.

Under normal working conditions, due to its high control ratio, triple eccentric hard seal butterfly valve is more stable and reliable than ordinary control valve. When interlocking occurs, triple eccentric hard seal butterfly valve can also cut off completely (zero leakage). From the perspective of practical application, it not only saves the investment cost, but also has a very stable control.

The coke cleaning valve at the outlet of cracking furnace in ethylene plant is a kind of valve with harsh service conditions in petrochemical industry. Carbon particles in process medium may accumulate on the sealing surface of the valve, causing the sealing surface to bite, which makes the valve unable to open and close normally, and even shortens the service life of the valve. Compared with other types of valves, triple eccentric hard seal butterfly valve is an ideal choice for its unique structural characteristics.