OVERVIEW

An Electro-Pneumatic Positioner is a critical device used in industrial automation to precisely control the position of a pneumatic actuator based on an electrical control signal (usually 4–20 mA). It’s commonly used with control valves in process industries like oil & gas, chemical, pharma, water treatment, and food processing.

SPECIFICATION

• Signal Input: 4–20 mA analog signal (from PLC/DCS or controller)

• Function: Converts electrical signal into a pneumatic output to control valve position

• Position Feedback: Built-in feedback mechanism ensures accurate valve positioning

• Fail-Safe Options: Can be configured to fail-open, fail-close, or last position

• Manual Override: Often included for manual valve operation during setup or emergency

• Communication: Some modern units support HART, PROFIBUS, or FOUNDATION Fieldbus

• Explosion-Proof Versions: Available for hazardous environments (ATEX certified)

FEATURES

• Regulating flow, pressure, temperature, and level in process systems

• Used in control valves for both linear and rotary actuator types