Fisher 3590 Valve Positioner Manual Guide
The 3590 operates on a force-balance principle. A 4-to-20 mA DC input signal feeds into a torque motor coil, creating a magnetic field. This field moves a beam relative to a pneumatic nozzle.
Various configurations and related components are available through retailers like Aeliya Marine Tech , Radwell International , and NRI Industrial Sales . Model Variant Key Details Approx. Price Fisher 3590ST Go to product viewer dialog for this item. Electro-pneumatic, 4-20 mA, 0-160 psi capability $308 - $314 Standard I/P positioner, 4-20 mA input ~$252 (Repair) Fisher 3590 with 667 Actuator Go to product viewer dialog for this item. Combined assembly with EZ body and 1/2" NPT ports fisher 3590 valve positioner manual
Use 3/8-inch or 1/4-inch stainless steel or copper tubing depending on the required air volume and stroking speed. Electrical Wiring The 3590 operates on a force-balance principle
Turn off all electrical input signals to the positioner to prevent accidental arc flashes or sparks, especially in hazardous locations. Electro-pneumatic, 4-20 mA, 0-160 psi capability $308 -
Because zero and span adjustments are interactive, changing the span will shift the zero point. Repeat steps 1 and 2 iteratively until the valve stroke precisely matches the 0% and 100% signal marks. Reversing the Positioner Action
This comprehensive technical guide covers the essential setup, calibration, and maintenance procedures typically found in the standard manual. 1. Safety and Pre-Installation Checks
The Fisher 3590 series is a family of heavy-duty, pneumatic valve positioners designed for precision stroke and angle positioning of rotary and sliding-stem control valves. The Fisher 3590 Positioner Manual serves as the definitive technical reference for installation, calibration, operation, and maintenance of this rugged, field-reversible instrument.
