The pneumatic hard sealing butterfly valve adopts precise J shape elastic seal ring and tri-eccentric multi-layer metal hard sealing structure. It is widely used in the industrial pipelines of metallurgy，power, petrochemical, water supply and drainage, municipal construction, etc. with medium temperature ≤ 425 ℃. It is used for medium regulating and cutoff.
As the butterfly valve adopts design principle of three-dimensional eccentricity, the space motion track of the sealing surface is idealized, the sealing surface has no friction and interference, with properly chosen sealing material, the valve has guaranteed sealing performance, high corrosion resistance, high temperature resistance and wear resistance. Its main features are as follows:
1, Small opening torque, flexible and convenient, saving energy.
2, 3D eccentric structure, valve disc gets tighter and tighter when closed. Sealing performance is reliable, achieving no leakage.
3, High pressure resistance, corrosion resistance, wear resistance, long service life, etc.
