In the past, butterfly valves were seldom used because of the poor performance of butterfly valves in China. Until the advent of Triple Eccentric Butterfly Valve, butterfly valves in China began to be widely used. Triple Eccentric Butterfly Valve has zero leakage. It is well known for its good sealing and long service life. Next we will talk about the reasons for the long life of the Triple Eccentric Butterfly Valve.
Since the advent of the tri-eccentric disc valve, in order to meet the increasingly harsh working conditions, it has also experienced a process of self-improvement and continuous development. Even if the most basic zero leakage, theoretical Triple Eccentric Butterfly Valve can be achieved, but in fact still depends on careful design, precision manufacturing.

Tri-eccentric metal hard-sealed butterfly valve has the advantages of high temperature resistance, easy operation, no friction in opening and closing, compensating sealing with the increase of the moment of transmission mechanism when closing, improving the sealing performance and prolonging the service life of butterfly valve. But there are still structural problems.

At present, as a component used to realize on-off and flow control of pipeline system, it has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower and so on. In the known butterfly valve technology, its dense form mostly uses the sealing structure, the sealing material is rubber, etc. Due to the limitation of structural characteristics, it is not suitable for high temperature, high pressure, corrosion and wear resistance industries.
A more advanced butterfly valve is a three-eccentric metal hard-sealed butterfly valve. The valve body and seat are connected components. The sealing surface layer of the valve seat is surfaced with heat-resistant and corrosion-resistant alloy materials. The multi-layer soft overlapping seal ring is fixed on the valve plate. Compared with the traditional butterfly valve, the butterfly valve has the advantages of high temperature resistance, easy operation, no friction in opening and closing. When closing, it compensates for the seal with the increase of the torque of the transmission mechanism, and improves the sealing performance and prolongs the service life of the butterfly valve.
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