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Vortex Tubes and Spot Cooling Products

Controlling Temperature and Flow in a Vortex Tube

Controlling Temperature and Flow in a Vortex Tube

Cold airflow and temperature are easily controlled by adjusting the slotted valve in the hot air outlet. Opening the valve reduces the cold airflow and the cold air temperature. Closing the valve increases the cold airflow and the cold air temperature. The percentage of air directed to the cold outlet of the vortex tube is called the "cold fraction". In most applications, a cold fraction of 80% produces a combination of cold flow rate and temperature drop that maximizes refrigeration, or Btu/hr. (Kcal/hr.) output of a vortex tube. While low cold fractions (less than 50%) produce lowest temperatures, cold airflow volume is sacrificed to achieve them.

Most industrial applications, i.e., process cooling, part cooling, chamber cooling, require maximum refrigeration and utilize the 3200 series Vortex Tube. Certain "cryogenic" applications, i.e., cooling lab samples, circuit testing, are best served by the 3400 series Vortex Tube.

Setting a vortex tube is easy. Simply insert a thermometer in the cold air exhaust and set the temperature by adjusting the valve at the hot end. Maximum refrigeration (80% cold fraction) is achieved when cold air temperature is 50°F (28°C) below compressed air temperature.

A 1/4 ton of refrigeration in the palm of your hand!
A 1/4 ton of refrigeration in the palm
of your hand!
EXAIR’s high temperature Vortex Tubes are ideal for spot cooling applications that are located in hot environments up to 392°F (200°C). They produce the same cold air temperatures down to -50°F (-46°C) and have cooling capacities of 135 to 10,200 Btu/hr. There are no plastic parts and the generator uses a brass construction. Please contact the factory for more information. High Temperature Vortex Tube
High temperature Vortex Tubes are
ideal for spot cooling applications in hot environments.


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