Control Options for Your ProSonix Steam Injection Heater

There are a number of options for controlling your PSX Steam Injection Heater.

  • Electro-Pneumatic that receive a 4-20 mA input control signal.
  • I/P Transducer that receives a 4-20 mA input signal.
  • Pneumatic Positioner that receives an air input signal for control.
  • Higher level Positioners with advanced diagnostic capabilities that communicate via HART, Profibus, Fieldbus, or other protocols.
Electro-Pneumatic Positioner with 4-20 mA Input Signal

Electro-Pneumatic Positioner with 4-20 mA Input Signal

Electro-Pneumatic positioners are available as an option on the PSX heater. Positioners allow the actuator to adjust to changes in parameters such as packing friction, or pressure imbalances and insure that the response of the valve position in proportion to the input control signal stays accurate. Positioners function as a closed loop position controller altering the valve output to maintain the desired position.

Control Signal is a 4-20 mA Input
I:P Transducer with 4-20 mA Input Signal

I/P Transducer with 4-20 mA Input Signal

I/P transducers are used to convert an electrical control signal (typically 4-20mA), into a pneumatic signal (typically 3-15 psig). The output of the transducer is linear to the input electrical signal.

Control Signal is a 4-20 mA Input
Pneumatic Positioner with Air Input Control Signal

Pneumatic Positioner with Air Input Control Signal

Pneumatic Controls The simplest means of controlling a PSX heater involves the use of pneumatic controls which measure and directly output the control signal to the PSX actuator. Pneumatic controls offer fast response, simple operation and reasonable accuracy. There is much less flexibility in a pneumatic control loop compared to an electronic control loop, but the installation is much less expensive and easy to use without the need for a controls engineer.

Control Signal is a 4-20 mA Input
Manual Control with a Air Filter Regulator

Manual Control with a Air Filter Regulator

For manual operation, the PSX heater will accept an air signal (typically 3-15 psig). To control the heater, install an air regulator on the incoming air line to the actuator. By controlling the air pressure to the actuator, you can control the position of the stem plug in the PSX heater which controls the steam flow. A simple thermometer on the discharge line will allow for monitoring of the output temperature.

Control Signal is an air signal
AccuTemp Temperature Controller

AccuTemp Temperature Controller

Most industrial process’ utilize DCS or PLC control platforms for control & monitoring.

Plant equipment. The PSX AccuTemp is designed for use with ProSonix Direct Steam Injection heaters. It allows for stand-alone control and monitoring of the PSX Heater. The PSX Accu-TempTM can also receive remote set-point input with the optional 4-20 mA input from your plant DCS or PLC.

The ProSonix AccuTemp temperature controller is designed to improve user efficiency with many features integrated to reduce commissioning time, simplify operation and minimize maintenance down-time. The LCD screen displays clear real-text messages. Control output signal is a 4-20 mA along with a remote start/stop input for remote control of your PSX Heater. There are multiple configurable alarms. Security is assured with password protection on supervisor and configuration parameter access levels. Contact ProSonix for a more detailed specification sheet on the AccuTemp temperature controller.
Contact ProSonix today to discuss your specific application requirements.
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