Regulating Valve Positioner/Samson Pneumatic Regulating Valve

Samson valve positionerInstall to pneumatic control valveUp, used to control signals based on input (reference variable)w）Position the valve stem (adjustable variable)x）Accurate positioning. Controlled byThe input control signal from the control system or controller is used as input toFixed value, control valve stroke or angle as feedback quantity andMeasurement value,valve positionerCompare the two and proceedAnd according to a certain pattern, give the pneumatic pressure signal (output variable)quantity）Adjust the valve position for the pneumatic actuator.valve positionerBasic composition: magneto resistive type（AMR）Valve position sensorSimulationi/pElectrical converterPneumatic amplifier, as well as with a microprocessorThe electronic unit.The magnetic steel connected by the feedback rod is non-contact with the shell installed insideformulaicAMRMagneto resistive sensorRegarding the itinerary or openingMeasure the angle and convert it into an electrical signal.The deflection of the feedback rod causes a change in the direction of the magnetic field, which isAMRThe sensor detects, and the microprocessor receives the detected signalDetermine the instantaneous valve position.Actual valve position signal and4-20mAAll given signals pass throughA/DconverterSend to microprocessor, MicroprocessorCompare and operate the valve position with the given valuePDControl algorithm.When there is a deviation in the system, the output calculated based on the deviation changesTransformation by electricity/Gas converterBecoming a pneumatic control signal,Pneumatic amplifierAmplify output to pneumatic actuatorConstruct, increase (inflation pressure) or decrease (exhaust pressure) outputSignal pressure is used to complete positioning.

External air source supplies gas to the pneumatic amplifierUnder pressureValue generator.The output of the pneumatic amplifier can be restricted by software through configurationSignal pressure to2.4 Ba.Output gas volume adjustmentQ（10）Used for optimizing with different gasesPositioning control coordinated with the actuator.

Tightly close functionWhen the input control signal (given value) is lower than1%Or higher than99%(See through parameter code)P10andP11Set EndEnd valve position), inflate the pneumatic actuator orEmpty it.Qi Kai（ATO）：P10→ON；P11→OFFQi Guan（ATC）：P10→OFF；P11→ON