Q) I have a Vortex Tube, but the air coming out is not very cold. Why?

There are a few reasons why this may be occurring.

  • Check to see if the hot air exhaust is open, it is best to close it completely and back it out one full turn. The Vortex Tube is made to perform best when the hot air exhaust is not completely  closed.
  • Check your inlet pressure. You must check the pressure right at the inlet of the Vortex Tube while it is operating. You will most likely need 80 to 100 PSIG for best performance.
  • Check to see if your Vortex Tube is clean. You can do this by removing the cold cap and inspecting the parts for dirt, oil and other debris. Simply clean the parts and the inside of the tube as well as possible to regain your performance. Remember, the Vortex Tube needs clean, dry air to perform best.
  • Make sure 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 2 PSIG will not change performance. 5 PSIG will change the cold air temperature approximately 5°F. If cold air ducting is used the total cross sectional area should be equal 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, or use a pipe nipple attached to the cold end to prevent air entrainment in order to get a more accurate reading.

If you have any further questions, or if these tips failed to solve your problem, please contact an Application Engineer at 1-800-903-9247.

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