Control Valve Accessories


3730-1 - Electro-Pneumatic Positioner

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

Travel/Rotation: Up to 200mm or 100o

Input:Single Multi-Turn Push Button

Display: Alphanumeric LCD with ability to rotate display 180o

Control: PD

Calibration & Tuning: Auto Calibration

The Type 3730-1 is an entry level electro-pneumatic positioner designed to 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 3730-1 provide self-calibration and automatic adaptions to the valve and actuator being controlled.  This entry level digital positioner has preset parameters such that only values deviating from the standard need to be adjusted. With 21 parameters and 15 error codes, most 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 digital positioner is protected against power failure damage to parameters thanks to EEPROM memory storage. The potentiometer-based travel sensor of the Type 3730-1 is not susceptible to wear often found in gear-based travel sensors.  The travel range of the Type 3730-1 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, 4 to 11.9mA or 12.1 to 20mA
  • Continuous monitoring of zero point
  • Output pressure limitation of 35 psi
  • Two standard software programmable limit switches.
  • Optional inductive limit switch to replace one of the software limit switches
  • Characteristics include 3 for Linear Valves and 8 for Rotary Valves
  • Aluminum or optional Stainless-Steel housing.
  • Up to SIL 3 capable device