Logix 3800 Digital Positioner - One Touch Calibration for Hazardous Environments

Jan 12, 2020

The Flowserve Logix 3800 digital positioner helps plant owners and operators maximize production while minimizing operating costs. It’s the oil and gas and chemical industries’ choice for applications that require a balance between technological sophistication and long-lasting reliability in tough environments.

This high-precision positioner simplifies installation through easy configuration and calibration. It also facilitates improvements in process uptime, reliability and process throughput. Advanced diagnostics not only identify developing problems in the control valve, but also help guide corrective actions to ensure reduced return-to-operation times.

Compatible with linear and rotary valves and actuators, the Logix 3800 digital positioner offers embedded measurement, data reduction, and diagnostic functionalities. Its control system-independent user interface facilitates easy configuration, operation and system diagnostics with a single view

Logix 3800 Revolutionary Features

  • One Touch Calibration without removing the cover
  • LED display
  • Full Diagnostics

Compatible with linear and rotary valves and actuators, Logix 3800 digital positioner delivers high reliability in tough environments. It provides unparalleled modularity and versatility within a single unit. Its ability to handle double- or single-acting, linear and rotary applications reduces inventory and operating costs. Installation is simplified with an innovative, one-button quick calibration feature.

Why Logix 3800?

Robust and reliable

Trouble-free performance in demanding applications is ensured by the shielded, dual-element, non-contact, magneto-resistive position sensor and temperature- compensated, dual-poppet pneumatic relay. The rugged, modular design provides protection from dirt and water ingress (IP-66), impact and vibration.

Easy configuration and calibration

Innovative quick calibration feature greatly simplifies commissioning. One-button setup automatically configures the zero, span and gain of the positioner for most valves in less than 60 seconds.

Predictive diagnostics

Powered by ValveSight DTM, the Logix 3800 has five on-board pressure sensors that enable operators to identify and assess the severity of developing problems so action can be taken before a critical event.

Application versatility

Broad application versatility with industry-leading communication technologies, including analog, HART, Foundation Fieldbus, 4-20 or discrete I/O signals. Optional module to remotely locate the positioner from the control valve. Compatible with a variety of valve and actuation configurations

Increased safety

Intrinsically safe, non-incendive and explosion-proof design from -52°C to 185°C (-62°F to 365°F) ensures safe, reliable operation in hazardous conditions. Certified for use in explosion-proof Exd IIC hazardous locations.

Greater air capacity

Up to 80% more air capacity with minimal air consumption is made possible by the double-poppet technology.


  • Air Cap: 30.6 Nm3/h @ 4.1 bar (18 SCFM @ 60 psi)
  • Air Con: 0.082 to 0.637 Nm3/h @ 4.1 bar (0.048 to 0.375 SCFM @ 60 psi)
  • Repeatability: ?0.25%
  • Temp: -52°C to 85°C (-61.6°F to 185°F)