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Foxboro SRD991 Intelligent Valve Positioner Advanced Digital Positioning with HART & Fieldbus

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Foxboro SRD991 Intelligent Valve Positioner Advanced Digital Positioning with HART & Fieldbus
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SRD991 Foxboro Valve Positioner

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HART Foxboro Valve Positioner
Basic Infomation
Brand Name: FOXBORO
Model Number: FOXBORO SRD991
Payment & Shipping Terms
Packaging Details: Packing type: cardboard box/non-fumigation wooden box
Product Description
Foxboro SRD991 Intelligent Valve Positioner Advanced Digital Positioning with HART & Fieldbus
Product Overview

The Foxboro SRD991 Intelligent Valve Positioner is a high-performance, microprocessor-based digital valve controller designed for demanding industrial process applications. Offering compatibility with HART ® 7 and Foundation Fieldbus ™, the SRD991 ensures accurate valve positioning, smart diagnostics, and predictive maintenance capabilities. Manufactured by Schneider Electric (formerly Invensys Foxboro), it supports both linear and rotary actuators and features auto-calibration, IP66 protection, and a wide operating temperature range, making it an ideal solution for industries such as oil & gas, power generation, chemicals, and water treatment.

Key Features & Benefits
  • High Precision Positioning - Linearity better than ±0.2%, repeatability ±0.1%
  • Dual Protocol Support - Communicates via HART 7 or Foundation Fieldbus
  • Advanced Diagnostics - Continuous monitoring of valve stroke, friction, air supply, and actuator performance
  • Auto Setup & Calibration - Simplified commissioning with push-button or remote configuration
  • Explosion-Proof Design - Certified for hazardous area use: ATEX, CSA, FM, IECEx
  • Flexible Mounting - Supports both linear and rotary actuators with NAMUR compliance
  • Durable Housing - IP66-rated, corrosion-resistant aluminum alloy enclosure
  • Integrated LCD Display - Intuitive user interface with multi-language support
Technical Specifications
Parameter Specification
Input Signal 4-20 mA DC with HART 7 / Foundation Fieldbus
Supply Pressure 20-100 psi (1.4-6.9 bar)
Positioning Accuracy ≤ ±0.2% linearity
Repeatability ≤ ±0.1%
Mounting Type Linear and rotary actuators (standardized interfaces)
Auto Calibration Yes (automatic stroke and pressure tuning)
Diagnostics Functions Valve deviation, leakage detection, pressure trends
Ingress Protection IP66
Operating Temperature -40 °C to +85 °C
Display Interface LCD with keypad
Explosion-Proof Certifications ATEX, FM, CSA, IECEx (optional models)
Communication Protocols HART 5/6/7, Foundation Fieldbus
Body Material Aluminum alloy with corrosion-resistant coating
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