Technical Specifications Control input: 4–20 mA; position feedback: LVDT; supply pressure: 40–150 psi pneumatic/hydraulic; stroke: 50 mm nominal; linearity: ±1% full scale; operating temperature: -20 °C to +70 °C; enclosure: IP65.
Functional Features Closed-loop position control; zero and span adjustment; hydraulic output; position feedback; fault detection on loss of signal.
Application Scenarios Process control valve positioning, turbine bypass valve control, industrial hydraulic valve positioner, flow control valve actuation.
Performance Parameters Position accuracy: ±1% of span; step response time: < 200 ms for full stroke; repeatability: ±0.5%; air consumption: < 0.1 scfm at steady state.
Material Composition Aluminum housing, hydraulic booster, LVDT position sensor, control circuit, stainless steel output rod.
Structural Characteristics Valve mount design; yoke output connection; side electrical connector; adjustment screws for zero and span.
Working Principle The positioner compares input command signal with valve position feedback from LVDT, adjusts hydraulic output pressure to the valve actuator to move the valve to the target position.
Installation Requirements Mount on valve actuator yoke; connect hydraulic supply and actuator lines; connect 4–20 mA control signal; calibrate zero and span.
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