The CN8 series eccentric rotary control valve is a type of eccentric angular stroke control valve with a ball crown surface as the valve core. Adopting an integrated and straight through flow channel valve body structure, the rotation center of the valve core is not concentric with the rotation axis, which can reduce valve seat wear and extend service life; It has the advantages of excellent stability, erosion resistance, corrosion resistance, reliable sealing, and large adjustable flow range. In addition, this series of control valves has a compact structure, large output torque, sensitive and stable action, long service life, and can be widely used in heavy load conditions in industrial control fields such as petroleum, chemical, coal chemical, power, metallurgy, etc.