How to Purchase Foxboro SRD991 Smart Valve Positioner

A Smart Valve Positioner is a device that precisely controls valve opening based on feedback signals. Compared to traditional pneumatic positioners, smart positioners incorporate microprocessors and feature self-calibration, self-diagnostics, and remote communication capabilities. They enable real-time interaction with higher-level systems via digital protocols such as HART, FOUNDATION Fieldbus, or Profibus PA.

The Foxboro SRD991 is a representative product in this category.

• High-Precision Positioning Control
  Utilizing Digital Signal Processing (DSP) technology, the SRD991 achieves exceptional control accuracy and response speed. It precisely adjusts the operating position of control valves, making it suitable for demanding process control applications.
• Multi-Protocol Communication
  Supports mainstream industrial communication protocols including HART, Fieldbus, and Profibus PA, enabling seamless integration into DCS or PLC systems for real-time monitoring and remote adjustment.
• Robust Self-Diagnostic Capabilities
  Continuously monitors valve status, air supply, travel feedback, and other parameters. Automatically triggers alarm signals upon anomalies, significantly enhancing plant maintenance efficiency.
• Intelligent Auto Calibration
  With a single button press, the system automatically calibrates zero point and full scale, minimizing human error and accelerating installation efficiency.
• Rugged and Durable Design
  Features an explosion-proof aluminum alloy housing with corrosion-resistant coating, ensuring long-term stable operation in harsh environments including high temperatures, humidity, and chemical exposure.

• Petrochemical process control systems
• Steam regulation systems in power plants
• Precision flow control in pharmaceutical and food industries
• Automation systems for water treatment and environmental protection projects

Its intelligent features are particularly suited for production sites requiring precise regulation and remote diagnostics.

As demonstrated, the Foxboro SRD991 not only achieves superior control precision and system compatibility but also reduces long-term maintenance costs.

When selecting an intelligent valve positioner, focus on the following key points:

• Valve Type (Linear or Rotary)
• Control Signal Type (4-20mA / Digital Communication)
• Operating Environment Requirements (Explosion-Proof Rating, Temperature/Humidity)
• Brand Compatibility (compatible with control valves from Fisher, Masoneilan, Samson, etc.)

Dr. Industry Group (Shanghai Gongboshi) consistently supplies genuine Foxboro SRD991 Smart Valve Positioners with ample stock on hand. We provide technical selection guidance, installation commissioning, and after-sales support.