... ,which is ANSI 2500# . 202B series metal seated ball valve is particularly designed to fulfill the requirements of high ... ring are specially harden treated.This ball vakves with its reliable operation,lower torque ,excellent tightness and long life, has ... chemical,power plants ,metallurgy and so on.Metal Seated Ball Valve(Floating Ball Valve & Trunnion Valve)Standard Specifications Series:202B (which ...