Emerson Fisher 3582 Electro Pneumatic Valve Positioner for Industrial Automation Applications

Product Overview

The Fisher 3582 pneumatic valve positioner is a robust, field-reversible device designed for use with diaphragm-actuated, sliding-stem control valve assemblies. It receives a pneumatic input signal (typically 0.2 to 1.0 bar or 0.4 to 2.0 bar) from a control device and modulates supply pressure to the actuator to maintain precise valve stem position proportional to the input signal. The 3582 series includes models with and without bypass, gauges, or automotive tire valves. The 3582NS variant is specially qualified for nuclear service applications.

Key Features

• Field-reversible action (direct or reverse) without additional parts
• Linear cam (Cam A) as standard; characterized Cams B and C available for modified flow characteristics
• Low steady-state air consumption (0.38–0.54 normal m³/hr depending on supply pressure)
• Independent linearity ±1% of output signal span; hysteresis 0.5% of span
• Easy cam reversal and range spring change for different input signals
• Bypass operation on select models for manual control

Technical Specifications

Applications

Ideal for process control in oil & gas, chemical, power generation, and refining industries where reliable pneumatic positioning of sliding-stem control valves is required. The 3582NS model is qualified for nuclear power plant service.

Frequently Asked Questions

• Q: Can the 3582 be used for split-range operation?

  A: Yes. No additional parts are required; simply calibrate using the desired split-range input signals after beam alignment.

• Q: How do I change from direct to reverse action?

  A: Move the flapper assembly to the opposite quadrant of the beam (DIRECT or REVERSE) and recalibrate.

• Q: What cam is supplied as standard?

  A: Linear Cam A is installed at the factory.

Contact Us

Phone/WeChat/WhatsApp: +8613916209596

Email: svetama@gbsxj.com

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