Flowserve Logix 3200MD Digital Valve Positioner HART 4-20mA for Pneumatic Valves

Product Overview

The Flowserve Logix 3200MD is a digital HART valve positioner that uses state-of-the-art piezo technology to provide superior performance and reliability. It is a two-wire, 4-20mA input digital valve positioner that operates an actuator/valve based on an analog input signal.

The 3200MD can be easily configured using the local buttons, HART handheld, and SoftTools software. It features local status LEDs, local DIP switches/calibration buttons, and auto tuning with dynamic gain selection. The positioner utilizes HART 5 for communication.

The unit supports both double-acting and single-acting actuators for linear and rotary mountings. It is insensitive to supply pressure changes and can handle supply pressures from 30 to 150 psig. The explosion-proof enclosure is rated Class I Division 1 Groups B-D, Ex d IIB+H2, AEx d IIB+H2.

Technical Specifications

Application Industry

The Flowserve Logix 3200MD is used in oil and gas, chemical processing, power generation, water treatment, and pharmaceutical industries. Key applications include pipeline and actuator control, reactor valve positioning, turbine bypass automation, and flow regulation in plants.

Common Problems

• No LED blinking: Current is below 3.6 mA or wiring polarity is incorrect. Verify supply current is at least 3.6 mA and check polarity.

• Erratic communications: HART signal issues. Check current source bandwidth is limited to 25Hz. Verify cable length and impedance. Use a compatible intrinsic safety barrier.

• Unit does not respond to analog commands: Unit is in digital command mode or a calibration error occurred. Change command mode to analog. Recalibrate the unit.

• Valve position reading not as expected: Position sensor mounting not at 180 degrees, stroke not calibrated, or MPC active. Reposition sensor. Calibrate stroke.

• Position driven fully open or closed: Stroke not calibrated, Hall sensor inner loop not connected, wrong air action set, or tubing reversed. Calibrate stroke. Check hardware connections.

• Friction Calibration Required: No friction calibration performed since factory reset. Perform Friction Calibration using the display menu, handheld, or DTM.

Replacement Models

The Flowserve Logix 3200MD is a mature digital positioner platform. For applications requiring additional safety integrity, the Logix 3200MD+ variant offers enhanced features. For newer installations, the Logix 3800 is an alternative model within the same product family. For cross-vendor alternatives, verify actuator mounting, travel range, and communication protocol before ordering.