Technical Specifications 4-20mA analog signal input, HART communication protocol, pneumatic output to valve actuator, supply air pressure range, explosion-proof optional version.
Functional Features Receives control signal from DCS, adjusts air pressure to control valve stroke, provides valve position feedback, self-diagnosis and alarm function.
Application Scenarios Chemical, oil & gas, power plant, water treatment process control loops for flow, pressure and temperature regulation valves.
Performance Parameters High positioning accuracy, fast response to setpoint change, built-in valve stroke monitoring, long-term stable operation in harsh field environment.
Structural Characteristics Compact field mounted housing, pneumatic relay assembly, terminal block for signal wiring, local position indicator.
Working Principle Receives 4-20mA command signal, compares with actual valve position feedback, adjusts pneumatic output pressure to drive actuator until target stroke is reached.
Installation Requirements Mount directly on pneumatic valve actuator, connect instrument air supply and control signal wiring, ground properly.
Usage Notes Ensure clean and dry instrument air. Calibrate valve stroke after installation. Do not disassemble in hazardous area without permission.
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