Sealing principle of butterfly valve When processing the valve plate, ensure that its sealing face has a suitable surface roughness value, and the synthetic rubber valve seat forms a suitable surface roughness value when molding. When the valve is closed, through the rotation of the valve plate, the outer sealing surface of the valve plate squeezes the synthetic rubber valve seat, making the synthetic rubber valve seat produce elastic deformation and forming elastic force as the sealing pressure to ensure the sealing of the valve.

Scope of application
1. Boiler factory;
2. Cement plant;
3. Iron and steel plants, smelting furnaces and combustion furnaces;
4. Thermal power plants and nuclear power plants;
5. Air conditioning air supply system;
6. Glass and mineral wool industry;
7. Petrochemical enterprises;
8. Air and gas cleaning plant;
9. Fan factory, and all in the industry with high flexibility and sensitivity to pressure and request, must be installed in the center of the shrink joint.