A Matter of Choice

They say having multiple choices in life is a good thing.  This is also true when it comes to spray nozzles, specifically EXAIR’s atomizing nozzles.

Spray nozzles in action.
Spray nozzles in action.

Atomizing nozzles are used to coat, cool, treat, and paint products.  They are also useful for dust mitigation.  EXAIR offers a variety of nozzles, all stainless steel construction for durability and corrosion resistance, that allow for many different spray patterns.   The nozzles only come with two inlet sizes – 1/4NPT and 1/2NPT,  but this is not really the choice-limiting factor it sounds to be.  There are a variety of spray patterns and liquid volume outputs available per size.  The way the air and liquid mix together creates the style of nozzle, they are Internal, External, Siphon Fed, No Drip Internal, No Drip External, and No Drip Siphon Fed.   On top of that, with each mix style and size, there are a large number of spray patterns available.  More choices!

Internal mix nozzles mix a liquid (viscosities up to 300cP) and air, both pressure fed, inside the air cap and produce the finest atomization.  External mix nozzles mix a liquid (viscosities above 300cP) and air, both pressure fed, outside the air cap and allow the liquid and air flows to be adjusted independently.  These nozzles have the highest flow rate and are best used where precise liquid flow is needed.  Siphon Fed nozzles require no liquid pressure.  They can be used with gravity fed liquids (viscosity up to 200cP) or liquids from a siphoned height up to 36in.

The spray patterns available are:  Flat Fan, Deflected Flat Fan, Wide Angle Flat Fan, Narrow Angle Flat Fan, 360° Hollow Circular, Round, Wide Angle Round, and Narrow Angle Round.   Each pattern is different and is tailored for certain usages.  Think of how you use your garden hose.  Many of the patterns and their uses are the same.

Mix and match to meet your needs.  With all the combinations available, you should have no problem finding the perfect pattern for your application.  If you find this plethora of choices to be a bit overwhelming and need assistance, please contact an EXAIR Application Engineer at 1-800-903-9247; we would be happy to assist.

John Pinchek
Application Engineer

Leave a Reply