Fisher 3590 Valve Positioner Manual Extra Quality Jun 2026

The manual dedicates a full section to range spring selection. For split-ranging, the spring must be physically changed—not just recalibrated. Using the wrong spring (e.g., a 3–15 psi spring for a 6–30 psi range) will result in zero hysteresis but incorrect stroke, which cannot be corrected by the zero/span adjustments alone.

Standard 4-20 mA DC; options for 10-50 mA or split-range operation are available. Output Signal: fisher 3590 valve positioner manual

The Fisher 3590 series consists of pneumatic and electro-pneumatic positioners designed for use with diaphragm-actuated valves. They use a feedback linkage to sense the actual valve position and compare it to the input signal from the control system. Key Components Receives the 4-20mA or pneumatic signal. The manual dedicates a full section to range