What role does the three eccentric hard seal butterfly valve play in petrochemical industry?

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

The three eccentric hard sealing butterfly valve uses the three-dimensional eccentric principle design to idealize the spatial motion track of the sealing surface, and there is no friction and interference between the sealing surfaces. In addition, the sealing materials are properly selected, so that the sealing, corrosion resistance, high temperature resistance and wear resistance of the butterfly valve are reliably guaranteed. Its main features are as follows:

1. Small opening torque, flexible and convenient, labor-saving and energy-saving.

2. The three-dimensional braided core structure makes the butterfly plate tighter and tighter, and its sealing performance is reliable to achieve no leakage.

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 dn1000mm 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 and has good durability and reliability. It is precisely because the three eccentric hard seal butterfly valve has significant advantages compared with stop valve, ball valve and gate valve. Therefore, the three eccentric hard seal butterfly valve has been successfully applied in many occasions in the petrochemical industry.

Eccentric butterfly valve integrates regulation and cut-off (realizing zero leakage), which has a successful typical application in polyethylene plant. The reactor cooling water temperature regulating circuit of polyethylene plant is an important part of the plant. Whether the temperature regulating circuit can operate smoothly directly determines whether the whole polyethylene plant can operate safely and stably. The temperature regulating water pipeline is of large diameter.

Under normal working conditions, due to its high regulation ratio, the three eccentric hard seal butterfly valve is used as a regulating valve, which is more stable and reliable than the ordinary regulating valve. When interlocking occurs, the three eccentric hard seal butterfly valve can also cut off and completely cut off (zero leakage). From the practical application, not only the investment cost is saved, but also the control is particularly stable.

The coke cleaning valve at the cracking furnace outlet of ethylene plant is a valve with harsh service conditions in the petrochemical industry. Carbon particles in the process medium may accumulate on the sealing surface of the valve, causing the sealing surface to bite, so that the valve can not be opened and closed normally, and even shorten the service life of the valve. Compared with other types of valves, three eccentric hard seal butterfly valve has become an ideal choice because of its unique structural characteristics.