Amongst EXAIR’s continuously growing product offering, some of the newest are a family of Air Atomizing Liquid Spray Nozzles that does not require a pressurized liquid source. These are known as the Siphon Fed Air Atomizing Nozzles. These nozzles can be easily implemented where a tank can be installed and lower the cost of the installation by not requiring a liquid pump, just point of use compressed air.
This action is done by the unique design of the air cap. As the velocity of the air passes through the air cap, low pressure is created by a venturi. The Siphon Fed Atomizing Nozzles can draw liquid from a suction height of 36” (91 cm), or gravity fed. They are manufactured from 303 stainless steel for durability and corrosion resistance. The Siphon Fed models can spray viscous fluids up to 200 centipoises and are used in many applications like rinsing, coating, cooling, quenching, humidification, or dust control. The images below showcases how simple the setup can be for the siphon and gravity fed installations.
EXAIR carries three different body sizes, 1/8” NPT, ¼” NPT, and ½” NPT ports; so, you can create a light mist or a heavy spray of liquid. The maximum liquid flow rate is controlled by the air cap and liquid cap combination. A unique feature of the EXAIR Atomizing Nozzle is that the caps are easily interchangeable for each body size to modify the spray patterns, control the amount of fluid, and reduce any downtime if cleaning is required. The video below shows just how easily the changeover is done.
In addition to the three different inlet/body sizes, we also offer the Siphon Fed in both a round spray pattern or a flat fan spray pattern. These are also controlled by the air and liquid cap combination. This means it is easy to convert a round pattern that may be needed for a job, over to a flat fan pattern for the next setup. Each pattern is also available in several flow rates of liquid and air to dial in the performance required by the application.
Additionally, if you would like to positively shut the liquid flow off from the nozzle in order to prevent drips, over use of liquid, or to shut off the gravity fed liquid when not needed, the No-Drip versions of these nozzles is also available. This is easily controlled by simply reducing the compressed air operating pressure to below the designated cracking pressure of the patented No-Drip valve.
If you would like to discuss which spray nozzle is best suited for your application, please reach out to an Application Engineer.