New Flowserve Logix 3400MD Digital Positioner FOUNDATION Fieldbus Valve Control Linear Rotary

The Flowserve Logix 3400MD is a two-wire FOUNDATION Fieldbus (FF) digital valve positioner designed for precise control of both single- and double-acting linear and rotary actuators. It is fully powered by the FF signal, supports local configuration via DIP switches and a local interface, and enables remote two-way communication. The positioner uses a two-stage stem-positioning algorithm (inner-loop spool control and outer-loop stem position control) with software-based characterization, eliminating the need for mechanical cams.

• FOUNDATION Fieldbus protocol (ITK 5.1 compliant) with Link Master capability
• Local user interface with DIP switches for configuration and RE-CAL button for stroke calibration
• Software characterization: Linear, Equal Percent, Quick Open, or custom 21-point curve
• Soft limits and FINAL_VALUE_CUTOFF functions
• Advanced diagnostics including valve signature, travel accumulator, cycle counter, and position deviation alerts
• Compatible with Valtek linear and rotary valves plus NAMUR mounting
• Intrinsically safe, explosion-proof, and non-incendive certifications

Ideal for process control in oil & gas, chemical, power generation, and refining industries where FOUNDATION Fieldbus networks are used. Suitable for both linear and rotary control valves requiring high accuracy, diagnostics, and hazardous-area certification.

• Logix 3200MD series positioners
• Valtek Mark One control valves
• Valtek rotary actuators
• ValveSight diagnostic software