Oil and gas producers use a Pneumatic Temperature Controller to control a set temperature in production vessels.
Its most common use is in indirect heaters, emulsion treaters, reboilers, steam generators, heat exchangers, cooler shutter controls, and salt bath heaters.
How Does It Work?
Pneumatic Temperature Controllers have a stainless tube to monitor changing temperatures. This tube connects to a diaphragm or a bellows assembly.
A pilot plug seat is throttled from the combination of differential pressure across the diaphragm or bellows. This changes in the length of the stainless tube.
The pilot plug consists of two stainless balls fused together. One of these balls is the supply pressure inlet. The other ball is the pressure vent.
Indirect vs. Direct Output Pressure
Pneumatic Temperature Controllers can be configured for either indirect or direct output pressure during operation.
If your temperature controller is assembled for indirect action, here’s how it will work:
- The temperature in the system exceeds your set point.
- Then the tube and rod move the thermostat diaphragm assembly.
- This decreases the output pressure, and the pilot or control valve respond accordingly.
If your temperature controller is assembled for direct action, here’s how it will work:
- The temperature in the system exceeds your set point.
- Then the tube and rod will move the thermostat diaphragm assembly.
- This will increase the output pressure, and the pilot or control valve will respond accordingly.
If you have further questions about this or any other product, contact your local Kimray store or authorized distributor.
Explore More
How Does a Heater Treater Work?
How to Repair, Test, and Calibrate a Temperature Controller
How to Safely Reduce Emissions in your Burner Management Systems
