Sphere of elastic ball valve. Ball and seat sealing adopts metal materials, sealing pressure is very big, relying on the pressure of the medium itself already could not reach the requirements of sealing, must exert external forces. This valve is suitable for high temperature and high pressure medium.
Elastic ball is on the lower end of the sphere wall open one elastic slot, and elasticity. When close the channel, sphere rolling out with stem wedge-shaped head pressure to seal with the valve seat. Wedge head before you turn the sphere are released, the sphere then restore the original prototype, appear very small gap between the sphere and valve seat, can reduce the sealing surface friction and operating torque.