Control Valve Accessories


3730-6 - Electro-Pneumatic Positioner (HART)

Operation: Linear and Rotary (Independent of Fail-Safe Action or Moving Direction)

Travel/Rotation: Up to 300mm or 100o

Input: Single Multi-Turn Push Button

Display: Alphanumeric LCD with ability to rotate display 180o

Communications: HART and SAMSON TROVIS VIEW

Control: PD

Calibration & Tuning: Auto Calibration with Four Different Initialization Modes


The Type 3730-6 HART enabled electro-pneumatic positioner is an enhanced version of the Type 3730-3 with added pressure sensors that can work in general industrial applications. This positioner can work inherently with single-acting linear and rotary control valves as well as double-acting linear and rotary control valves with the addition of a reversing amplifier.  The digital benefits of the Type 3730-6 provide self-calibration and automatic adaptions to the valve and actuator being controlled via 4 initialization methods.  This digital positioner has preset parameters such that only values deviating from the standard need to be adjusted. With 50+ parameters and 30+ error codes, the majority of critical settings and information can be communicated.  The HMI (human machine interface) of the single multi-turn push button and LC-display allow this communication of information to occur right at the unit. The potentiometer-based travel sensor of the Type 3730-6 is not susceptible to wear often found in gear-based travel sensors.  The travel range of the Type 3730-6 can be restricted up to 1/5 maximum stroke as well as operated in split range. 

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Features & Benefits

  • Low steady state air consumption (less than 0.06 scfm at all supply pressures)
  • Tight-closing function
  • Set point range of 4 to 20mA and user define with at least 25% of entire stroke utilized.
  • Continuous monitoring of zero point
  • Output pressure limitation of various defined values.
  • Two standard software programmable limit switches.
  • Optional inductive limit switch to replace one of the software limit switches
  • Programmable limitations of the reference variable and travel range
  • 10 Define Characteristics plus one user defined (entered over operating software)
  • Programmable performance characteristics (i.e. PID control coefficients)
  • Aluminum or optional Stainless-Steel housing.
  • Optional solenoid, analog transmitter, external sensor, leakage sensor, & binary input.
  • Integrated diagnostics including device status and event messages, data logger, histograms (travel setpoint deviation, and cycle counter), drive signatures (steady & hysteresis), end position trending, static characteristic test, partial stroke test, and full stroke test.
  • Up to SIL 3 capable device