Prism™ PI Expeditor

Position control for optimal process performance
The Prism Expeditor controls sanitary diaphragm and other linear valves to any position.
By partially opening or closing the valves, process batching may be optimized. This enables more precise control of the flow of your valuable ingredients.

Compact and durable, the PI is suited for corrosive, heavy  washdown and hazardous areas.

Fast, easy set-up
By using the teach button the unit quickly learns the valve characteristics and is able to provide consistent performance. Bold mechanical and LED indication shows electronic and valve position status.

Optional Wireless Link
Remote set-up monitoring, control and diagnostics are available through the optional Wireless Link capability. Changes are restricted when in normal operating mode, ensuring security.


Position sensor and control module


The PI features an intelligent linear magnetic resistive sensor system to precisely measure stroke position at all times and provides control signals to the solenoid control. Features include:

  • High accuracy over wide operating temperature range.
  • Automated teach function to tune control algorithm to the specific actuator.
  • High intensity LEDs for visibility of valve position status even in brightly lit areas.
  • Fully potted and sealed making it resistant to high vibration forces and moisture.
  • Convenient, simple push button teach settings may be done by simply removing the cover
    or with the Wireless Link, teach function can be be set remotely.

Interfacing devices

Prism™ PI Expeditor files

Conventional Apple® devices may be used, including:

  • iPhone® Version 4S and above
  • iPad® Version 3.0 and above
  • iPad mini™ All

Positioner operation

The Expeditor’s position control is directly proportional to the input signal from 20% to 80%. (7.2 mA to 16.8 mA).

  • When the input signal is less than 20% (7.2 mA), the actuator is driven closed.
  • When the input signal is greater than 80% (16.8 mA), the actuator is driven open.


Optional Wireless Link
Remote set-up monitoring, control and diagnostics are available through the optional Wireless Link capability.

Changes are restricted when in normal operating mode, ensuring security.




Pneumatic Control

Two three-way, two-position spring return pneumatic valves quickly and precisely operate valves to specific position in less than two seconds.

The high flow, long life solenoid valves operate at low power and are well-suited for most applications.

They feature a convenient manual override for stroking during set-up and commissioning.