Pnuematic Control Valve and Digital Positioners Flowserve Logix 520MD 3200MD 3800 Valve Accessories FISHER 2000

The Flowserve Logix 3800 is a reliable digital positioner built for precise valve control in demanding industrial settings. It uses a shielded, dual-element, non-contact magneto-resistive sensor and a temperature-compensated dual-poppet pneumatic relay to deliver consistent performance. The modular, rugged design suits tough environments, offering easy configuration and powerful diagnostics via ValveSight DTM.

• Non-contact, dual-element magneto-resistive position sensor for reliable, low-maintenance feedback.
• Temperature-compensated dual-poppet relay for stable pneumatic control.
• Up to 80% more air capacity with minimal consumption thanks to double-poppet technology.
• Five on-board pressure sensors for predictive diagnostics and problem severity assessment.
• Rugged modular housing protects against dirt, water (IP66), impact, and vibration.
• One-button Quick-Cal setup configures zero, span, and gain quickly for most valves.
• SIL 3 capable for safety-critical applications.

Air Capacity: 30.6 Nm³/h @ 4.1 bar (18 SCFM @ 60 psi). Air Consumption: 0.082 to 0.637 Nm³/h @ 4.1 bar (0.048 to 0.375 SCFM @ 60 psi). Repeatability: ≤0.25%. Temperature Range: -52°C to 85°C (-61.6°F to 185°F). Housing Materials: Copper-free aluminum or stainless steel. Enclosure Protection: IP66. Certifications: SIL 3 capable; ATEX/IECEx (explosion-proof and intrinsically safe options). Compatibility: Linear and rotary valves/actuators; single- or double-acting configurations. Communication: HART protocol (with ValveSight DTM for diagnostics).

Well-suited for control valve actuation in oil & gas, chemical processing, power generation, and refining—particularly where high reliability, predictive maintenance, and performance in harsh conditions are essential.

Consider the Logix 3800e as a cost-effective alternative on the same platform, or the Logix 3200MD for piezo-based HART models in similar applications.