Valve Positioner Card

Product Overview:

A Valve Positioner Card is an electronic module installed within or alongside a control valve positioner. It interprets an input control signal (typically 4–20 mA or digital fieldbus), compares it with the actual valve position feedback, and adjusts the actuator to bring the valve to the desired position. This ensures accurate valve performance, reduces hysteresis, and enhances process control.

Category:

Description

Technical Specifications:

Parameter Details
Input Signal 4–20 mA DC, Digital (HART / Fieldbus / Profibus – optional)
Power Supply 24V DC (typical)
Output Signal Pneumatic (to actuator), Electrical feedback (4–20 mA)
Position Feedback Potentiometric / Hall Effect / Optical Encoder
Actuator Compatibility Single-acting / Double-acting Pneumatic Actuators
Communication Protocols Analog, HART, Foundation Fieldbus, Profibus
Linearity Β±1% of full scale (typical)
Ambient Temperature -20Β°C to +70Β°C
Ingress Protection IP65 / IP66 / IP67 (depending on enclosure)
Mounting NAMUR / custom mount
Calibration Manual (via push buttons) or Auto via HART / PC
Display (if any) LCD / LED for position, diagnostics, error codes
Diagnostics Built-in (valve response, travel deviation, loop status, alerts)
Fail-Safe Function Configurable to fail-open, fail-close, or fail-in-place

 

Features

Key Functions:

  • Receives control signal (analog or digital)
  • Compares signal with actual valve position
  • Adjusts actuator movement to achieve desired position
  • Provides feedback to the control system (4–20 mA or digital)
  • Enables diagnostics and calibration
  • Supports HART, Foundation Fieldbus, or Profibus (in smart positioners)

Benefits

Benefits:

  • High positioning accuracy and stability
  • Improves control loop performance
  • Reduces valve wear and maintenance
  • Easy diagnostics and troubleshooting
  • Compatible with modern control systems

Applications

Applications:

  • Oil & Gas Plants
  • Power Generation Units
  • Chemical and Petrochemical Industries
  • Water and Wastewater Treatment
  • Food and Beverage Processing
  • Pharmaceutical Manufacturing
  • HVAC and Building Automation
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