High Performance Fisher 3582i Electro Pneumatic Valve Positioner for Industrial Control Valves

The Fisher 3582i electro-pneumatic valve positioner combines a 582i converter with a proven 3582 pneumatic platform to deliver precise 4-20 mA to pneumatic conversion for sliding-stem control valves. Designed for demanding hazardous environments, it receives a DC current input signal and modulates supply air to the actuator while maintaining a valve stem position proportional to the input. The modular 582i converter ensures reliable operation in classified areas worldwide.

• Certified for ATEX, CSA, and FM hazardous locations including intrinsically safe, explosion-proof, and Type n.
• Entity parameters (Ui ≤ 30 V, Ii ≤ 150 mA, Pi ≤ 1.25 W) for safe interconnection.
• Flameproof and dust-ignition-proof options with T4/T5/T6 temperature codes.
• Forced venting capability and robust EPDM components for nuclear or high-radiation service.
• Local calibration and bypass options for safe on-line maintenance.
• Reversible action and split-range capability without recalibration.

• Emergency shutdown and critical control valves in oil & gas.
• Refinery and petrochemical plants with ATEX/IECEx zones.
• Nuclear power applications (3582NS variant).
• Hazardous dust or gas areas requiring flameproof protection.
• Safety instrumented systems needing reliable pneumatic output.

• What approvals does it hold? ATEX intrinsically safe/flameproof/Type n, CSA/FM explosionproof, and dust-ignition-proof.
• Can it be used with natural gas supply? No—the 3582i is not approved for natural gas.
• How do I connect in hazardous areas? Follow entity parameters and use certified barriers/seals per the loop schematic.
• What temperature codes apply? T4 (Tamb ≤ 71 °C), T5 (≤ 62 °C), T6 (≤ 47 °C).
• Is reclassification risk minimized? Yes—special “safe use" instructions are provided for each approval.

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