Fisher 3582i Valve Positioner
The Fisher 3582i valve positioner offers a field-proven positioner structure. It has high accuracy, fast response, and can withstand vibrations in most plant environments. Its low steady-state air consumption makes it more efficient.
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Detailed introduction
Fisher 3582i Valve Positioner Introduction:
The Fisher 3582i valve positioner offers a field-proven positioner structure. It has high accuracy, fast response, and can withstand vibrations in most plant environments. The low steady-state air consumption makes its operation more efficient.
Here are the key features of the Fisher 3582i electro-pneumatic valve positioner:
Input Signal: Accepts a 4–20 mA DC signal, with split-range capability for finer control
Output Signal: Pneumatic pressure output up to 95% of supply pressure, suitable for diaphragm actuators
Modular Design: Integrates the 582i electro-pneumatic converter with the 3582 pneumatic positioner
Mounting: Direct mounting on sliding-stem control valves; field-reversible action (direct/reverse)
Cam Feedback Mechanism: Provides accurate valve stem positioning proportional to input signal
Environmental Resilience: Operates in temperatures from -40°C to +71°C; rugged construction for industrial use
Certifications: CSA, FM, ATEX, IECEx approvals for hazardous locations
Maintenance-Friendly: Easy access to zero/span adjustments and internal components
Air Quality Requirement: Requires clean, dry, oil-free air—especially important due to EPDM components
| Parameter | Details |
|---|---|
| Input Signal | 4–20 mA DC (with optional split-range capability) |
| Output Signal | Pneumatic, up to 95% of supply pressure |
| Supply Pressure Range | 1.4 to 5.0 bar (20 to 75 psig), clean and dry air required |
| Operating Temperature | -40°C to +71°C (-40°F to +160°F) |
| Mounting | Direct on actuator (sliding-stem valves) |
| Action Type | Field-reversible: Direct or Reverse |
| Feedback Mechanism | Cam and feedback arm for linear or customized response curves |
| Certifications | CSA, FM, ATEX, IECEx for hazardous environments |
| Materials of Construction | Aluminum housing with epoxy-powder-coated exterior |
| Adjustments | External zero and span screw adjustments |
| Air Consumption | Nominal 0.06–0.09 m³/h (2–3 scfh) depending on configuration |
Fisher 3582i – Frequently Asked Questions
Q1: What type of signal does the 3582i accept?
A: It accepts a 4–20 mA DC input signal, with optional split-range capability for finer control.
Q2: What kind of actuator is it compatible with?
A: It’s designed for diaphragm-actuated, sliding-stem control valves, with direct mounting.
Q3: Can the action be reversed in the field?
A: Yes, the unit supports field-reversible action—direct or reverse—by repositioning internal components.
Q4: What is the operating temperature range?
A: It operates reliably from -40°C to +71°C (-40°F to +160°F).
Q5: Is it certified for hazardous areas?
A: Yes, it carries CSA, FM, ATEX, and IECEx certifications for use in hazardous environments.
Q6: How is calibration performed?
A: Calibration is done via external zero and span screws, with detailed steps provided in the .
Q7: What air quality is required?
A: The unit requires clean, dry, oil-free air, especially due to EPDM components in the converter.
Q8: Can it be used in split-range applications?
A: Absolutely. The 3582i supports split-range operation, allowing multiple positioners to control a single valve across different signal ranges.
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