RG intelligent valve positioner is a two-wire system instrument made by RG. The positioner is a control accessory of pneumatic valve. It is widely used in automatic control systems of petroleum, chemical,electricity,metallurgy,paper and pulp industry and other fields.

RG intelligent valve positioner accepts the 4~20mA valve setting analog signal from the control system. This valve setting value will be converted by an analog to digital converter (ADC) to digital signal then input to CPU.At the same time,instrument gets the actual valve position from location  sensors.The two  signals are compared by the instrument software so as to control the intake and exhaust of the pneumatic actuator,and drive the valve to reach set point (refer to Figure2-1)

RG intelligent valve positioned is based on  micro process or technology.  It can overcome friction and the imbalance power on the control valve well, and improve the response speed of control valve, which makes the position set rapidly and accurately. It is not only able to completely substitute conventional valve positioner, but also is able to directly access HART network,exchanging information between control system and positioner.