Product Description

The SRD991-CHFS7FAANY-CSV14 is a smart digital valve positioner for Foxboro I/A Series and Evo DCS. It provides precise control of pneumatic actuators with advanced HART communication for remote diagnostics, configuration, and real-time valve monitoring.

Featuring a double-acting pneumatic amplifier, multi-lingual graphical LCD, and local push-buttons, this positioner supports auto-start self-calibration and manual adjustments directly at the valve. Its copper-free construction makes it ideal for chemical processes where contamination must be avoided.

Key Specifications

• Input Signal: 4–20 mA DC with HART

• Pneumatic Output: Double-acting (supports single-acting)

• Supply Pressure: 1.4–6 bar (20–90 psig)

• Stroke Range: 8–260 mm (0.3–10.2 in)

• Angle of Rotation: Up to 95°

• Linearity: ≤ 0.4% of travel span

• Hysteresis: ≤ 0.3% of travel span

• Display: Multi-lingual full-text graphical LCD

• Environmental Protection: IP65 / NEMA 4X

• Operating Temp: -40 °C to +80 °C 
  Weight: 2.0 kg 

Applications

• Oil & gas refineries

• Chemical and petrochemical plants

• Power generation facilities

• Critical control loops requiring predictive maintenance and valve friction monitoring

Technical FAQ

• Double-Acting Advantage: Uses air pressure to both open and close the valve, offering faster response and higher power for large or high-friction actuators.

• Auto-Start Function: Self-calibrates mechanical endpoints and optimizes P-I-D parameters, reducing commissioning time.