21Jan 2019
Choosing Spray Nozzle Which Nozzle Should Using Blog Header

The spray nozzle market is very diverse and with innumerable types to choose from, selecting the appropriate spray nozzle for a particular type of application can be a confusing process. However, it is important to get it right, as using a spray nozzle that isn’t entirely suited to the job can reduce operating efficiencies and lead to increased downtime and costs.

Although there are many factors to consider when choosing a spray nozzle, it is always important to take into account what sort of liquid is being sprayed, as well as the desired droplet size and flow rates you want to achieve, along with the spray angles and patterns required in order to get the job done. Keep reading to learn about the many factors that you should consider when choosing a spray nozzle.

Factor in what you’re spraying

The many different varieties of spray nozzle are designed to meet specific application needs; therefore, the spray nozzle you require will in the first instance depend on what is being sprayed.

The viscosity of the liquid being sprayed is a key determining factor in selecting the right spray nozzle. Generally speaking, the thinner the liquid being sprayed (i.e., low viscosity), the smaller the orifices on the spray tip need to be. For materials that are thicker or heavier (i.e., high viscosity), larger orifices are required.

The viscosity of the liquid being sprayed will also affect the types of spray patterns and coverage that can be achieved, both of which are key factors in spray nozzle selection. Choosing the right spray nozzle tip for the material being sprayed will also reduce the frequency of clogging and blockages, producing greater operating efficiency.

Conveyor Dust Removal

Pictured: Dust being removed from conveyors at a port loading facility with our Spraytech Systems spray nozzles.

Using an appropriate droplet size

Modern spray nozzle technology means that the way in which a liquid is atomised for spraying can be configured so as to achieve a precise droplet size, which can range from a fine mist to a coarse spray. Understanding the size of droplet that best suits your application is therefore an important way of achieving efficiency and cost-effective operation, and so should help to determine the sort of spray nozzle required.

Why spray nozzle flow rates matter

The overall efficiency of a spray nozzle depends on optimum flow rates being achieved, taking into account the application, the spray nozzle type and the coverage required. Getting the flow rate right also means that the correct size of droplet is produced, along with the desired spray pattern.

Different varieties of spray nozzle will produce different flow rates (measured in litres per minute), which will also in part be determined by the flow pressure (measured in bar).

Water Flow Rate in Relation to Pressure Graph

Pictured: A Graph of Water Flow Rate in Relation to Pressure

Choosing the right spray pattern and angle

Spray nozzles are designed to produce a wide range of spray patterns to suit many different types of applications. The distance and angle between the spray tip and the surface, when combined with the spray pattern, ultimately determines the amount of coverage that is able to be achieved, as well as the impact force of the spray jet.

Choosing the right spray pattern and angle is therefore key to achieving maximum operating efficiency. Nozzles that produce hollow cone, full cone, solid stream or flat spray patterns are each designed for different applications, and so it is important to understand the distribution capabilities of each when selecting a spray nozzle.

Spray Patterns Diagram

Pictured: Spray pattern diagram. 

Spraytech Systems are Australian spray nozzle specialists

With more than two decades’ experience with spray nozzles, Spraytech Systems can provide you with expert advice and guidance when it comes to selecting a spray nozzle for any type of application. Contact us on (08) 9259 4350 to talk to one of our highly experienced team about your specific requirements.

23Feb 2018

The humble spray nozzle doesn’t get a lot of attention but its applications are widespread and often go unrecognised. But life would be very different if we didn’t have them. So here are a few industrial applications that spray nozzles are used for.

The car & truck wash

Yes, the humble car wash that every kid loves and every adult still secretly enjoys. It wouldn’t be the same without those powerful spray nozzles enveloping your car until you think it’s going to obliterate you into a thousand pieces. That is until the water disappears and the spray nozzles start blowing air at your car so hard that you think the windows will break. Then it’s all done and you emerge from this specialised spa treatment for your car, all clean and shiny, well at least your car does, and you can’t help but think that that kind of treatment would work on humans as well. Where do you think spas got their specialised shower ideas from?

Road sprayers

When you’re stuck on the road waiting for the road construction worker to wave you through, have you ever watched those trucks going up and down spraying water on the road bed? They are there to stop the clouds of dust produced which would otherwise cover your car. And if you weren’t quick enough with the recirculation button on your controls, dust could even get inside your car making you cough and sneeze!

Field and road markings

Do you think all those markings on sports fields and roads are made by people with a paint brush? No way. Those are nozzles doing their thing, spraying paint evenly and slowly to make sure our rugby fields and tennis courts don‘t look like a 2-year old with a crayon drew the lines. Also, imagine if our road markings were done by hand, drivers would be swerving all over the place just to make sure they stayed in their lanes. Yes, those humble nozzles play a bigger part in our lives than you could ever imagine.


When it’s in the middle of an Aussie summer heatwave and you’re enjoying a drink with your mates, but that cold one is not doing its job and you think you’re going to melt into a glob of beer-flavoured human gloop. Suddenly a cool mist descends on you like manna from heaven, making the heat dissipate and putting you in an altogether better mood. Yes, those nozzles are spraying fine mist and cooling everything down.

Bitumen Spraying

That nice smooth road surface you enjoy driving on, is created by trucks using special nozzles that can spray an even layer of hot, liquid tar. Before these nozzles came along, creating an even surface on our roads was a very difficult, time consuming and almost impossible task. Now we can create the surface our high powered cars need.

Whether it’s cleaning your car or a fine mist spray on a hot summer’s day, a smooth road or an evenly marked sports field, the applications of nozzles in our lives are endless and indispensable.

If you need any kind of nozzle whatsoever, contact your local specialists, they’ve got it all.