Butterfly valve is one of the most frequently used valves, which we commonly comes with concentric soft seal butterfly valve, double eccentric butterfly valve and triple eccentric butterfly valve. Usually, the concentric soft seal butterfly valve is mainly used in normal temperature, low pressure working conditions, such as water supply and drainage, water conservancy engineering, municipal construction and other fields.Then  what is double eccentric butterfly valve? What is triple eccentric butterfly valve? And what conditions do they apply to?


PTFE seated double eccentric butterfly valve is Corrosion resistant. Metal seated double eccentric butterfly valve is high temperature resistance. But metal seated double eccentric butterfly valve is not able to withstand high pressure. AS the plate is directly contact with the sealing face which will cause leakage when used in high pressure working conditions.

Double eccentric butterfly valve is used in water supply and drainage, sewage, construction, petroleum, chemical industry, light textile, papermaking, hydropower, metallurgy, energy and other fields.


Triple Eccentric Butterfly Valve makes the best of both concentric and double eccentric butterfly valves.There are more choices for the seat material of triple eccentric butterfly valves, and is able to suit both low and high temperature and All kinds of acid, alkali and other corrosive media.

In addition,  triple eccentric butterfly valve can achieve zero leakage, especially suitable for large diameter valve, and, in the use of shut-off valve, can replace the gate valve and ball valve. When used to regulate the flow rate, it can replace the cumbersome globe valve.

At present, the triple eccentric butterfly valve is widely  used in oil mining, oil refining, petrochemical, energy generation and other important industrial fields of the pipelines. With people's continuous research,it is believed that the triple eccentric butterfly valve will be used in more and more fields.