Schneider Foxboro SRD991 Valve Positioner | Digital Intelligent Valve Controller

The Schneider Foxboro SRD991 Valve Positioner is a smart, microprocessor-based digital valve controller designed to provide accurate control of pneumatic actuators. Equipped with advanced communication and diagnostic functions, the SRD991 ensures optimal valve performance in oil and gas, petrochemical, power, and general industrial applications.

• Digital communication via HART, Profibus PA, and Foundation Fieldbus
• Integrated valve diagnostics and predictive maintenance capabilities
• High accuracy and repeatability for pneumatic actuators
• LCD display for easy configuration and monitoring
• Robust design suitable for harsh industrial environments
• Supports single-acting and double-acting actuators

• Communication: HART, Profibus PA, Foundation Fieldbus
• Input Signal: 4–20 mA DC with digital overlay (HART)
• Supply Pressure: up to 6 bar (90 psi)
• Output Signal: Pneumatic control for actuator positioning
• Enclosure: IP65, explosion-proof options available
• Display: Multi-language LCD with diagnostic menu
• Operating Temperature: -40°C to +80°C
• Materials: Aluminum or stainless steel housing

• Oil and Gas production and refining
• Petrochemical and chemical plants
• Power generation facilities
• Pulp and paper industry
• Water and wastewater treatment
• General process automation

• Improves valve reliability and reduces downtime
• Enables predictive maintenance through advanced diagnostics
• Enhances process efficiency with precise control
• Compatible with leading DCS and PLC systems
• Reduces lifecycle cost of control valves

Q1: What communication protocols does the Foxboro SRD991 support?
A1: It supports HART, Profibus PA, and Foundation Fieldbus.

Q2: Can the SRD991 be used in hazardous environments?
A2: Yes, it is available in explosion-proof and intrinsically safe versions.

Q3: Is the SRD991 compatible with both rotary and linear actuators?
A3: Yes, it can be used with both types of pneumatic actuators.

Q4: What industries commonly use the SRD991 positioner?
A4: Oil and gas, petrochemical, power generation, pulp and paper, and general process automation.

Xiangjing (Shanghai) Mechanical and Electrical Tech Co., Ltd.
Phone: +86-15000725058
Website: www.shgongboshi.com
Address: Building 6, No.98, Fulian 1st Road, Baoshan District, Shanghai, China

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