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Control Valve Positioner
Control Valve Positioner is used for regulating air load pressure of the actuator of that valve. This positioned is usually used for the application that requires error free and fast controlling of air load pressure. It is equipped with high performance electro pneumatic or pneumatic amplifier. Feed back link of this positioned is used to identify precise position of control valve. As part of its operation, input pressure is delivered from controller section to its bellow. Transferred pressure moves nozzle and goes towards orifice. Delivered pressure promotes falling of diaphragm. As its result, the valve of this Control Valve Positioner tends to close.