Process Control Valves for oil & gas,power,petro-chemicals-Throttling/Modulating Type Globe type;Ball valve;Butter fly valve; Construction; Major parts; Sizing Equations valve flow coefficient Cv definition ;Cv determinants;valve charecteristics; ANSI valve leakage class; Sizing Software; Installation Data,process data,Cv calculations, Selection of valve,port area,valve travel, Noise limitations ;Actuators; Pneumatic actuators; I/P converter, valve positioner. Electric Actuators,Hydraulic Actuators