Fisher 3590 Valve Positioner Manual //top\\ ✮ [QUICK]

Fisher 3590 series of electro-pneumatic valve positioners is an obsolete product line formerly manufactured by Fisher Controls (now part of Emerson)

Overview

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Mounting: Secure the positioner to the actuator yoke using the provided mounting bracket. Ensure the feedback pin is centered in the linkage slot. Fisher 3590 series of electro-pneumatic valve positioners is

Pneumatic pressure for valve plug travel (7/16 to 4-1/8 inch) Supply Pressure 5 PSIG higher than upper range limit of input; Max 50 PSI Action Field-reversible (Direct or Reverse) Operating Temp -40°F to 150°F (-40°C to 66°C) Installation & Maintenance Summary Direct acting: Increasing signal → valve stem extends

Valve Hunting: Check for loose feedback linkages or excessive friction in the valve packing. Cleaning the Orifice

Components

• Positioner housing with cover
• Input signal connection (pneumatic and/or electrical terminals)
• Supply air inlet and output ports to actuator
• Zero and span adjustment screws
• Feedback arm/lever and linkage to valve stem/actuator
• Calibration potentiometers or set screws (zero, span, gain, and override)
• Optional I/P converter module (for 4–20 mA control)
• Visual position indicator

• Direct acting: Increasing signal → valve stem extends.
• Reverse acting: Increasing signal → valve stem retracts.
• To reverse action: Swap the input signal connections and reposition the flapper/nozzle feedback linkage (refer to manual Figure 8).