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How to choose the right nozzle? What issues need to be considered?

We have previously talked about how to choose the right nozzle and its main applications. But what are the practical issues to consider before choosing a nozzle?

Selecting a nozzle involves many factors. However, the decision-making process necessarily leads to an appropriate choice if specific variables are considered.

We have compiled 10 questions for your reference when choosing a nozzle. When choosing nozzle equipment, be sure to ask yourself the following 10 questions to choose the right solution:

Questions to ask yourself before choosing a nozzle:

What is an application?
Washing, cleaning, disinfection, sterilization, cooling, drying, atomizing, wetting, coating, dust and foam removal, pollution control, gas scrubbing, water treatment, lubrication, extrusion, tempering, cold rolling, continuous casting: these are just some of the possible applications for nozzles. Knowing what to aim for will help you find the right product in no time.

What pressure is available?

A nozzle is a device that converts fluid energy into spray droplet velocity. The flow rate of the nozzle depends on the pressure. In general, it can be said that the higher the fluid pressure, the smaller the droplet size.Depending on the design of the nozzle, changes in supply pressure can have a large influence on the spray angle value.Nozzles will not work properly at low pressure values (starting from 0.5 bar, depending on nozzle type). The result is reduced performance, larger droplets, unclear spray patterns and lower spray angle values.

What is the traffic?

Calculating the flow rate discharged from a given nozzle requires the use of Bernoulli’s law, which states that the energy of liquid flow remains constant throughout the flow cross-section.

What is the desired nozzle material?

The most suitable material for a nozzle is one of the most critical decisions, as its service life depends on the material. The choice of material is directly dependent on the operating conditions such as pressure, temperature, type of fluid used, and finally the type of connection required.

What is the pipe material?

As with the nozzle, the material of the system is also critical.

What type of connection do you want?

The wide variety of nozzle connections can influence which product to choose. Nozzles are available with lock connections, welded joints, threaded joints, metal or plastic clips, etc.

What is the sprayed liquid?

The sprayed liquid will affect the material selection of the nozzle. All available materials for PNR Italia nozzles have specific mechanical properties such as corrosion resistance that are directly related to the sprayed liquid and the environment in which the sprinkler system is placed. The viscosity of the liquid also affects the performance of the nozzle.

Nozzles that work on the vortex principle, such as ordinary full-cone nozzles and vortex hollow-cone nozzles, will show a larger capacity when spraying liquids with a viscosity higher than water. As you can easily imagine, spraying a liquid thicker than water is a difficult task. All properties of the spray will deteriorate.

What is the distance from the nozzle to the target?

The spray angle is the opening angle formed from the nozzle orifice when the nozzle emits spray droplets, and it is one of the basic parameters for selecting a given nozzle.
It should be noted that due to several factors such as gravity and air resistance, spray angle values cannot be maintained over longer distances (typically up to 300 mm from the orifice).

What is the desired spray angle?

The spray angle is the angle formed by the cone of liquid exiting the nozzle orifice. The width of the spray angle and the distance between the orifice and the wetted surface determine the spray coverage area.
The nozzles are designed to ensure an even and high-impact spray, whether used alone or stacked. Nozzles are designed to dispense spray in different geometries. These spray geometries can be full cone, hollow cone or flat spray.

What are the environmental conditions around the nozzle?

If the nozzle is exposed to extreme temperatures, harsh environmental conditions or spray corrosion

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