Why is the air coming out my Vortex Tube not very cold?

There are a few reasons why this may be happening.

  • Check to see if the hot air exhaust is open. It’s best to close it completely and back it out one full turn. The Vortex Tube will perform best when the hot air exhaust is not completely closed.
  • Check your inlet pressure. This must be checked right at the inlet of the Vortex Tube while it is operating. For best performance, you will most likely need 5.5 to 6.9 BAR (80 to 100 PSIG).
  • Check to see that your Vortex Tube is clean. Simply remove the cold cap and inspect the parts for dirt, oil and other debris. Clean the parts and the inside of the tube as well as you can to regain the performance. Remember that the Vortex tube needs clean, dry air for best performance.
  • Make sure that the cold cap or the cold muffler is tight.
  • Reduce back pressure as much as possible. The performance of a Vortex tube deteriorates with back pressure on the cold air exhaust. Pressure up to 0.138 BAR (2 PSIG) will not change performance; 0.345 BAR (5 PSIG) will change the cold air temperature by approximately 2.8°C (5°F). If you’re using cold air ducting, the total cross-sectional area should be equal to or greater than the area of the Vortex Tube cold air exhaust.
  • Make sure you are checking the cold air temperature immediately inside the cold end exhaust. Alternatively, use a pipe nipple attached to the cold end to prevent air entrainment to get a more accurate reading.

If you have any further questions, or if these tips failed to solve your problem, please call us on 1300 787 688 or +61 8 8983 3999.

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