Emerson Fisher 3582i Electro-Pneumatic Valve Positioner with Fisher 67CFR Pressure Regulator

The Fisher 3582i electro-pneumatic positioner provides accurate valve positioning by converting a 4-20 mA input signal into a proportional pneumatic output. Built on the reliable 3582 platform with an integrated 582i converter, it offers field-reversible action, split-range capability, and simple cam adjustment for linear or equal-percentage valve characteristics—ideal for applications requiring tight control and easy maintenance.

• ±2% independent linearity and 0.6% hysteresis for precise positioning.
• Easy local calibration with beam alignment and range spring selection.
• Characterized cams for custom flow characteristics.
• Bypass and gauge options for on-line troubleshooting.
• Reversible direct/reverse action without additional parts.
• Low air consumption (0.46–0.64 normal m³/h) for energy efficiency.

• Globe and sliding-stem valves in process control loops.
• Split-range applications with multiple valves.
• Retrofit on existing pneumatic actuators.
• Flow control in chemical and power plants.
• Systems requiring frequent calibration checks.

• How accurate is the positioning? Independent linearity ±2% and hysteresis 0.6%.
• Can I change the cam? Yes—quick cam change for linear/equal-percentage response.
• How do I calibrate? Use beam alignment and the calibration procedure in the manual.
• Is split-range possible? Yes—factory or field-configurable input ranges.
• What about air consumption? Very low—typically 0.46 normal m³/h at 1.4 bar.

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