At present, Triple Eccentric Butterfly Valve is widely used in industrial pipelines because of its high temperature resistance, erosion resistance, long service life and other characteristics of hard sealing butterfly valve, as well as excellent sealing performance as soft sealing butterfly valve. Below Ruito's small edition will explain to you the principle of three eccentric butterfly valve.
The sealing surface of the Triple Eccentric Butterfly Valve is an oblique conical surface. The seat of the valve body is in contact with the sealing ring of the butterfly plate. The working principle of the Triple Eccentric Butterfly Valve is to drive the movement of the butterfly plate by operating the transmission device. During the movement of the butterfly plate, the sealing ring and the seat are fully contacted, because of the elastic deformation to achieve the sealing.

A prominent feature of Triple Eccentric Butterfly Valve is that it changes the sealing structure of the valve. It is no longer the traditional position seal, but the torsional seal. That is to say, it does not rely on the elastic deformation of the seat to achieve sealing, but relies on the pressure of the contact surface between the butterfly plate seal face and the seat to achieve sealing effect. This is also a good solution. Due to the large leakage of metal seats and the direct ratio between contact pressure and medium pressure, the triple eccentric butterfly valve has strong high pressure and high temperature resistance.

Triple Eccentric Butterfly Valve of Triple Eccentric Butterfly Valve
The first eccentricity: the deviation from the plane of the sealing surface to the center line of the stem;
Second eccentricity: the distance from the center line of the valve body to the center line of the stem;
Third eccentricity: There is an angle between the center line of the cone where the sealing surface of the valve body is located and the center line of the valve body passage.
Reasons for Using Tri-eccentric Structure
The use of tri-eccentric structure can reduce the friction between the sealing surface of the butterfly plate and the sealing surface of the valve body when switching on and off. When the tri-eccentric butterfly valve is opened or closed, the butterfly plate can quickly detach or relieve the seat, reduce the operating torque, save labor and increase the service life of the sealing surface of the butterfly valve.
Do you understand the principle of Triple Eccentric Butterfly Valve? If you need to buy Triple Eccentric Butterfly Valve, you are welcome to visit the official website or call us.