Foxboro SRI986-BIDS7EAANA Valve Positioner

• • • • • • • • • • • • • • FOXBORO SRI986-BIDS7EAANA Valve Positioner

                          • Product Overview

                            The Foxboro SRI986-BIDS7EAANA is an electro-pneumatic valve positioner used to precisely control the position of pneumatic control valves in industrial process systems. It converts a 4–20 mA control signal from a PLC/DCS into a proportional pneumatic output pressure, ensuring accurate valve positioning.

                            It belongs to the SRI986 intelligent positioner series, widely used in process automation and safety-critical flow control applications.

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                            Key Specifications

                            • Brand: Foxboro (Schneider Electric / Eckardt)
                            • Model: SRI986-BIDS7EAANA
                            • Type: Electro-pneumatic valve positioner
                            • Input Signal: 4–20 mA DC
                            • Output: Pneumatic signal to actuator (typically up to 6 bar / 90 psi)
                            • Action Type: Single-acting pneumatic actuator control
                            • Mounting: NAMUR standard mounting (IEC 534 compliant)
                            • Communication: Analog control (optional smart variants with fieldbus exist)
                            • Explosion Protection: ATEX certified (II 2 G EEx ia IIC T6)
                            • Features: Zero/span adjustment, damping, split range capability

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                            Advantages & Features

                            • High-precision valve position control (improves PID stability)
                            • Converts electrical signal → pneumatic actuator motion
                            • Excellent resistance to vibration and process noise
                            • Adjustable zero, span, damping, and gain
                            • Suitable for harsh industrial environments (ATEX certified versions)
                            • Supports NAMUR standardized installation for easy replacement

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                            Applications

                            • Oil & gas pipelines
                            • Petrochemical plants
                            • Refinery process control
                            • Power plant steam and gas control systems
                            • Chemical dosing and flow regulation
                            • Industrial pneumatic control valves

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                            Precautions

                            • Requires stable instrument air supply (clean, dry, oil-free)
                            • Must be properly calibrated (zero/span tuning required)
                            • Incorrect air pressure can cause unstable valve behavior
                            • Ensure correct NAMUR mounting alignment
                            • Do not mix with incompatible actuator types without adapter kit
                            • Electrical input must be stable 4–20 mA loop

The structure and details of the product：

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