Triple Eccentric Butterfly Valve belongs to rotary valve. Triple Eccentric Butterfly Valveis placed on the valve plate. In the process of valve manufacture, the outer edge of the valve plate adopts part of the outer spherical structure. External eccentric spherical surface is polished to achieve roughness Ra0.4, spherical surface is chromium plated or surfacing Stellay alloy. The hardness is HRC 45-60. Triple Eccentric Butterfly Valve disc valve has the highest pressure resistance of 26 MPa, low temperature resistance of - 196 C, up to 700 C, and zero leakage. It can be seen that the innovative structural characteristics of the Triple Eccentric Butterfly Valve make it have the following main characteristics.
Triple Eccentric Butterfly Valve is widely used because of its excellent high pressure, high temperature and sealing performance. Triple Eccentric Butterfly Valve can withstand high pressure up to 26 pa, low temperature up to - 196 C, up to 700 C, sealing hardness up to HRC 45-60. Because of the innovative structural characteristics of the Triple Eccentric Butterfly Valve, it has the following characteristics:
(1) Set regulation and cut-off in one, strong maneuverability.

The new Triple Eccentric Butterfly Valve is designed with double safety structure. In order to prevent butterfly plate deformation, stem dislocation and sealing surface occlusion caused by fluid pressure and temperature, two separate thrust rings are installed on the bottom and bottom sides of the butterfly plate to ensure the normal operation of the valve under any working conditions. In order to prevent sudden accidents caused by stem breakage and flying out, two separate stem flying out preventers are designed at the bottom and inside of the valve. Structure.

(2) No dead zone design, small opening moment.
Triple Eccentric Butterfly Valve plate shape is elliptical cone, its surface hardfacing carbide, excellent wear resistance, floating U-shaped stainless steel seat with automatic adjustment center function. When the valve opens, the elliptical conical sealing face disc first detaches from the U-shaped elastic seat. Then rotate; when closing, the valve plate rotates, under the action of eccentric axis, the valve plate automatically adjusts the center to the elastic seat, and presses the seat to deform until the seat closely matches the elliptical conical sealing surface of the valve plate. The butterfly plate does not scrape the valve seat when the valve is on and off, and the torque of the stem is transmitted directly to the sealing surface through the butterfly plate. The opening moment is small, thus eliminating the common jumping phenomenon when the valve is opened, that is, eliminating dead zone (no belt). This dead-zone-free design enables theTriple Eccentric Butterfly Valve to enter the adjustable region from zero to 90 degrees, and its control ratio can be as high as 100:1, twice as that of the general butterfly valve.
(3) Zero leakage, high temperature and high pressure resistance.
The greatest characteristic of three eccentricity is that it fundamentally changes the sealing structure, not the position seal, but the torsional seal, that is, it does not rely on the elastic deformation of the seat, but completely relies on the contact surface pressure of the seat to achieve the sealing effect. This sealing structure enables the triple eccentric butterfly valve to achieve a hard sealing V I class, reaching true zero leakage. At the same time, due to the selection of metal seats and the structural characteristics of face seals, the problem of high temperature and high pressure resistance is solved.
The new Triple Eccentric Butterfly Valve not only can replace the body seat, but also the butterfly plate sealing surface and the butterfly plate are independent. The butterfly plate sealing surface can also be replaced, which greatly reduces the maintenance cost.In addition, the new Triple Eccentric Butterfly Valve has realized the replacement of the body seat, and because the sealing surface of the butterfly valve and the disc plate are independent, the disc plate sealing surface is also replaceable, which greatly reduces the maintenance cost of Triple Eccentric Butterfly Valve.