What Makes Ultrasonic Nozzles Unique?-altrasonic.com

What Makes Ultrasonic Nozzles Unique?

2021-12-08

The working principle of the ultrasonic nozzle is to convert high-frequency sound waves into mechanical energy, and then transfer it into the liquid to generate standing waves. When the liquid leaves the atomizing surface of the nozzle, it is broken down into a fine mist of uniform micron-sized droplets.

Unlike pressure nozzles, ultrasonic nozzles do not use high pressure to force liquid through small holes to produce a spray. The liquid is fed through the center of the nozzle with a larger orifice without pressure, and is atomized due to the ultrasonic vibration in the nozzle. A proprietary precision ultrasonic generator designed by Sono-Tek provides the mechanical energy required to generate vibrations in the nozzle. The power required to operate an ultrasonic nozzle usually varies between 1 to 8 watts. Click here to view a simple animation illustrating the atomization process.

Each ultrasonic nozzle operates at a specific resonance frequency, which determines the median droplet size. There is almost no change in droplet size, and can fall within the strict prediction droplet distribution range through mathematical calculations. For example, a 120 kHz nozzle produces a median droplet size of 18 microns (when spraying water). The higher the frequency, the smaller the median droplet size.

The nozzle is made of very high-strength titanium alloy and other proprietary metals, giving it excellent chemical resistance and excellent acoustic properties. The electroactive element is contained in a sealed housing to protect the nozzle assembly from external contamination.

The liquid feed pipe runs through the entire length of the nozzle. The design of the nozzle ensures that the liquid only comes into contact with the titanium in the nozzle.