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
| Parameter | Value |
|---|---|
| Power Supply | Two-wire, 9–32 V DC (FF compatible); 9–24 V DC IS; 9–17.5 V DC FISCO |
| Operating Current | 18 mA |
| Communications | FOUNDATION Fieldbus Protocol ITK 5.1 |
| Operating Temperature | –40 °F to 185 °F (–40 °C to 85 °C) |
| Housing Material | Cast powder-painted aluminum or stainless steel |
| Weight | 8.3 lb (3.9 kg) aluminum; 20.5 lb (9.3 kg) stainless steel |
| Deadband | < 0.1 % full span |
| Repeatability | < 0.05 % full span |
| Linearity | < 0.5 % (rotary); < 0.8 % (linear) full span |
| Air Consumption | < 0.3 SCFM (0.5 Nm³/h) @ 60 psi (4 bar) |
| Air Supply | 30–150 psig (ISA 7.0.01 compliant) |
| Function Blocks | AO (1), DI (2), DO (1), PID (1), OS (1), IS (1) |
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.
No, it is fully powered by the two-wire FF signal.
Yes, with standard or optional Valtek rotary mounting kits and NAMUR option.
Clean, dry, oil-free instrument air per ISA 7.0.01 or dry nitrogen/sweet natural gas.
Phone/WeChat/WhatsApp: +8613916209596
Email: svetama@gbsxj.com
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