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Degassing Ultrasonic Cleaning Solutions

When you fill a glass with water and allow it to stand you’ll eventually see bubbles forming on the inside surface. These are caused by trapped air in the water. The presence of air decreases the energy of the collapsing vacuum-filled cavitation bubbles, thereby decreasing cleaning efficiency. Degassing ultrasonic cleaning solutions prior to the cleaning process removes trapped air and allows sonic cleaning to proceed more efficiently at the outset.

How to Degas Ultrasonic Cleaning Solutions

A degassing process should be undertaken each time fresh cleaning solutions are prepared.

You have the option of not degassing fresh ultrasonic cleaning solutions but the penalty is, as noted, decreased cleaning efficiency. If time or throughput efficiencies are not important, be our guest. Few firms, however, see the value in extending cleaning cycles by not properly preparing their cleaning solutions.

You will note many ultrasonic cleaners offered on the iUltrasonic site are equipped with what is called a degas mode. Those that do have the “degas mode” icon listed as a feature.

If your cleaner does not have a degas function you can accomplish the step by operating it without a load. Cavitation action with its associated heat generation mixes the fresh cleaning solution in the tank and drives trapped air to the surface in the form of bubbles that burst. In smaller cleaners this process is usually accomplished in 20 or fewer minutes. Many operators use this time to position parts to be cleaned in the cleaning basket. When the solution is ready cleaning can begin.

Elmasonic SH750EL speed the degassing of new cleaning solutions via its auto degas/degas function, both activated by a single switch. In this series the auto degas is activated when fresh solutions are prepared and can accomplish the task in about 10 minutes. In a sentence the degas mode pulses the ultrasonic power on and off. During the on phase the bubbles form and coalesce, and during the off phase they rise to the surface and burst. This, by the way, is why cleaners equipped with degas are more efficient than those not so equipped. The same action occurs in the permanent degas function and is used for special operations such as sample prep in the research lab.

So in summary, to degas or not to degas is not the question. As the user ask yourself if the added efficiency of a degas function is beneficial to your cleaning operations.

For more information on this important topic call the iUltrasonic cleaning experts.


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