Structural characteristics of the butterfly valve

The structure of the clamp butterfly valve will be slightly different from other valves, especially in the bias between the butterfly plate and the valve stem axis sealing surface, there is a size A, when the valve body channel axis is offset by a size B open, the sealing surface of the butterfly plate will be separated from the valve seat sealing surface faster than single eccentricity, on the long radius of rotation of the large semicircle, the tangent line of the butterfly plate sealing surface rotation trajectory will form a θ angle with the valve seat sealing surface, and the butterfly plate sealing surface can be completely separated from the valve seat sealing surface at the moment, so that the butterfly valve in the process of opening and closing, the relative mechanical wear between the butterfly plate and the sealing surface of the valve seatThe extrusion angle stroke is shorter, when the butterfly plate rotates from 0° to 8°~12°, so that the mechanical wear and extrusion deformation are reduced, and the sealing function and service life of the butterfly valve are more improved.

 

Features and description of the butterfly valve

 

1. The valve can be designed as a flange connection and a clamp connection.

 

2. The driving mode can be manual, electric or pneumatic

 

3. The "U" type stainless steel sealing ring is adopted, and the valve seat has a certain elasticity, and it has excellent sealing properties with the butterfly plate regardless of high temperature and low temperature.

 

4. It is a metal-to-metal wire sealing butterfly valve, and the sealing surface of the butterfly plate is made of surfacing stainless steel or surfacing cemented carbide, and the sealing surface is wear-resistant and has a long service life.

 

5. The butterfly plate streamline design, through rod, wear-resistant shaft sleeve and other parameters make the butterfly valve have excellent sealing, temperature resistance, pressure resistance, wear resistance and corrosion resistance.