Q340H/Y turbine half of an eccentric valve using eccentric body, eccentric sphere and valve seat, the valve lever make the rotary motion in common path self-centering, shut off more and more tightly in the process of fully achieve good sealing.The valve ball and seat completely out, eliminates the sealing ring wear, wear overcomes the traditional ball seat and the spheroid packing surface of the problem, non-metallic elastic material embedded in the metal seat, seat metal surface are well protected.This product is especially suitable for steel, aluminium, fiber, tiny solid particles, pulp, coal ash, such as liquefied petroleum gas (LPG) medium.