Foxboro SRD991 Intelligent Valve Positioner Schneider HART PROFIBUS FF Digital Positioner SIL3

Product Overview

The Foxboro SRD991 Intelligent Positioner delivers precise, reliable pneumatic valve control with built-in intelligence for modern process plants. Combining robust mechanical design, advanced diagnostics, and flexible communication, it reduces commissioning time, improves valve health visibility, and supports safety-critical applications up to SIL 3.

Key Features

• Graphical multilingual LCD + three local keys for full configuration without external tools
• Multiple Autostart modes optimized for standard, small, or large actuators
• Premium diagnostics: online friction, valve signatures, Partial Stroke Test (PST) for ESD valves
• Low-load HART (420 Ω), FISCO-compliant fieldbus protocols
• Rugged IP66/NEMA 4X housing; intrinsic-safety versions available
• Plug-in option boards for position feedback, binary I/O, and limit switches
• Direct mounting capability and original feedback levers for minimal backlash

Technical Specifications

Applications

Continuous process control, safety instrumented systems (SIS), emergency shutdown (ESD) valves, predictive maintenance programs, and plants requiring HART or fieldbus integration.

Frequently Asked Questions

• Q: Does the SRD991 support Partial Stroke Testing?
• A: Yes, PST is available for verifying ESD valve functionality without full stroke.
• Q: What air quality is required?
• A: Clean, dry, oil-free air per ISO 8573-1 (solids class 2, oil class 3).
• Q: Is local configuration possible without a handheld or PC?
• A: Yes – full configuration is available via the three push-buttons and LCD.

Contact Us

Phone/WeChat/WhatsApp: +8613916209596

Email: svetama@gbsxj.com

Related Products

SRD960 positioner, Foxboro control valves, DTM-based diagnostic software (VALcare / Valve Monitor), pressure gauges, volume boosters, stainless-steel housing variants.