With the continuous progress and development of butterfly valve technology in our country, the application scope of butterfly valve has been further expanded. Especially after the advent of Triple Eccentric Butterfly Valve, its good sealing and high temperature resistance have been highly recognized by people, occupying an important position in various fields, especially in petrochemical industry. Next, let's understand the application of Triple Eccentric Butterfly Valve in petrochemical industry.

In large caliber pipelines, the cost of using globe valves is very high and zero leakage can not be achieved. In the case of emergency shutdown, cut-off valves must be installed at the side of globe valves. Although V-type ball valves can also be cut off (zero leakage) and adjusted, the cost is much higher than that of Triple Eccentric Butterfly Valve. At present, butterfly valves over DN300 mm have gradually replaced gate valves. Compared with gate valve, butterfly valve has the characteristics of short opening and closing time, small operating moment, small installation space and light weight. Taking DN1 000 mm as an example, butterfly valves are about 2 T and gate valves are about 35 t, and butterfly valves are easy to be combined with various driving devices, so they have good durability and reliability. Triple Eccentric Butterfly Valve has significant advantages compared with globe valve, ball valve and gate valve, so Triple Eccentric Butterfly Valve has been successfully applied in many occasions in petrochemical industry.

1. Triple Eccentric Butterfly Valve, which integrates regulation and cut-off (realizing zero leakage), has been successfully applied in polyethylene plant. The temperature control loop of reactor cooling water in polyethylene plant is the most important part of the device. Whether the temperature control loop can run smoothly directly determines whether the whole polyethylene plant can run safely and smoothly. Temperature control pipeline is large diameter (DN450 mm or more). Under normal working conditions, Triple Eccentric Butterfly Valve is more stable and reliable than ordinary control valve because of its high control ratio. When interlocking occurs, Triple Eccentric Butterfly Valve can also play a cut-off role and completely cut off (zero leakage). From the practical application, it not only saves the cost of investment, but also has a very stable control.
2. The coke clearing valve at the cracking furnace outlet of ethylene plant is a kind of valve used in petrochemical industry under harsh conditions. Carbon particles in process media may accumulate on the sealing surface of the valve and cause the sealing surface to occlude, so that the valve can not switch normally, and even shorten the service life of the valve. Compared with other types of valves, Triple Eccentric Butterfly Valve has become the most ideal choice because of its unique structural characteristics.
3. The cut-off and adjustment of inlet pipeline of FCC flue gas turbine in refineries, due to the large diameter of the process pipeline and the high temperature flue gas (up to 750 C), the main valve used is Triple Eccentric Butterfly Valve. The maximum size of the domestic valve has reached DN1 800mm, and the closing time of the hydraulic actuator is less than 05 s. Others, such as the main fan inlet and outlet pipeline and the vent valve, are used. Tri-eccentric butterfly valves are also widely used in the inlet and outlet pipelines of air compressors, flare relief valves, slurry pump inlets and outlets, and the regulation and cut-off of various high, medium and low pressure steam pipelines. Liquefied petroleum gas (LPG) is very easy to leak. It is more reliable to use Triple Eccentric Butterfly Valve on the main line of import and export of its storage tank to meet the needs of large circulation capacity and avoid leakage. In addition, Triple Eccentric Butterfly Valve with steam jackets are currently used in sulfur recovery plants for liquid sulfur that needs to be transported in a melting state.
Beijing Ruito Jiangnan Automatic Control Equipment Co., Ltd. is a manufacturer of angle stroke control valves. It specializes in producing high temperature butterfly valves, Triple Eccentric Butterfly Valve, metal sealed butterfly valves, pneumatic fork actuators, etc. Call if you need it.