New Original Foxboro SRD991 Smart Positioner Intelligent Valve Controller Stock Supplier

The Foxboro SRD991 Intelligent Valve Positioner is a high-end digital positioner designed to drive pneumatic actuators on control valves with outstanding precision and diagnostic capability. It supports multiple communication protocols including HART, PROFIBUS PA and FOUNDATION Fieldbus, and is suitable for both linear and rotary actuators. With features such as multilingual graphical LCD, self-calibration, advanced diagnostics and explosion-proof options, the SRD991 is engineered for demanding process industries where reliability and process integrity are critical.

• Multi-protocol communication: HART, PROFIBUS PA, FOUNDATION Fieldbus.
• Graphical multilingual LCD with push-button configuration for local setup.
• Auto-start self-calibration and built-in self-diagnostics for valve health monitoring.
• Suitable for linear and rotary actuators, compatible with NAMUR/IEC standards.
• High protection rating (IP66/NEMA 4X) and available explosion-proof versions (ATEX/IECEx) for hazardous zones.
• Supports large strokes up to 260 mm (or angle rotation up to 95° standard, 300° optional).
• Advanced diagnostics for predictive maintenance including valve footprint, on-line friction, ramping signatures and partial stroke test (PST) capability.

• Industrial pneumatic control valves in oil & gas processing plants
• Refining and petrochemical control loops
• Power generation and steam turbine feedwater valve automation
• Water and wastewater treatment valve systems
• Pharmaceuticals and food & beverage process control
• Hazardous area installations requiring SIL rated diagnostics

Q1: What communication protocols are supported by the SRD991?
A1: The SRD991 supports HART, PROFIBUS PA and FOUNDATION Fieldbus H1 depending on model configuration.

Q2: Can the SRD991 be mounted on both linear and rotary actuators?
A2: Yes. It supports linear actuator mounting per NAMUR/IEC 60534-6-1 and rotary actuator mounting per VDI/VDE 3845/IEC 60534-6-2.

Q3: Does it provide diagnostics and predictive maintenance?
A3: Yes. The SRD991 includes advanced diagnostics features such as on-line friction monitoring, position history, real-time valve health assessment and even PST (Partial Stroke Test) support for ESD valves.

Q4: Is there an explosion-proof variant?
A4: Yes. Explosion proof versions certified to ATEX / IECEx / FM / CSA are available for installation in hazardous zones.

Q5: What is the typical stroke and angle capability?
A5: Standard stroke range is 8 to 260 mm with the standard lever; the angle version supports up to 95°, with optional up to 300°.

For quotations, technical support, or custom configuration of the SRD991, please contact:
Phone: +86-15000725058
Email: edward.zhao@gongboshi.com
Website: https://www.shgongboshi.com/contactus.html

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