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34 John X Merriman Street
Oakdale, Bellville, 7530
Tel: +27 21 946-2872
Fax: +27 21 946-2873
Email: info@spraytech.co.za
Web Site: www.spraytech.co.za

TECHNICAL INFORMATION

 

THE SPRAY NOZZLE
The spray nozzle transforms the energy of a liquid into kinetic energy.
The kinetic energy is utilized to break up the liquid into small particles, and to disperse them evenly according to the desired pattern.
In some cases the kinetic energy is used to increase the penetration force of the jet.
The nozzle also makes it possible to obtain pre-set capacities according to the pressure applied as can be seen from the tables in this catalogue.


CAPACITY
The capacity depends on the internal flow area and on the working pressure.
In general the relationship between the capacity and the pressure is the following:

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Q1 and P1 are known capacity and pressure. Q2 is the resulting capacity at desired pressure P2. All the tables of the catalog are based on water. For liquid with a specific gravity other than 1 multiply the catalog water capacity by the following conversion:

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Nozzle descriptions:
A wide range of precision nozzles with various spray patterns are available to suit most spraying applications.

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Hollow cone spray: type A
The liquid particles are distributed evenly forming the outer shell of a hollow cone. The area covered by the spray, falling perpendicularly to the jet, is in this case a circumference whose diameter is relative to the distance of the nozzle and the spray angle.

Full cone spray: type B
In this type of spray the internal part of the cone is also filled evenly with liquid particles. The area covered by the spray,falling perpendicularly to the jet, is in this case a circle whose diameter is relative to the distance of the nozzle and the spray angle.

Flat jet: type C
In this type the area covered by the spray falling perpendicularly in an elongate elliptical shape. The dimension of the lateral axis is relative to the distance between the nozzle and the covered area. The dimension of the longitudinal axis is relative both to the distance from the nozzle and the spray angle.

Atomizing nozzle: type E
In these nozzles the compressed air is mixed with the liquid to provide a fine atomization. From the tables you can choose the type of atomizer which better satisfies your specific requirements.

Spray angle
The spray angle is usually measured near the orifice.
Increasing the spray distance the measure of the spray width becomes less exact because of gravity effect and ambient conditions. It must be considered that an increase of the viscosity of the products to spray reduces the spray angle. The table lists the theoretical coverage at various distances in relation with the spray angle.

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Droplet size (Atomization)
The major factors affecting droplet size are: capacity, pressure and the spray pattern. Usually an increase of the capacity and pressure, produces a larger droplet size. An increase in pressure only, reduces the droplet size, and results in an increase of the spray angle.

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Impact
Spray impact depends on capacity, pressure and spray pattern. The highest impact is produced by solid stream and flat spray, the lowest by wide full and hollow cone.

Nozzle wear
The wear effect on the nozzle orifice results in an increase of flow rate. Under the same conditions, stainless steel usually lasts five times longer than brass.

Classification of spray measures

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Article code
The standard material of our product is indicated on the table 1. Eurospray may also supply the nozzles even with non-standard material according to the customer’s request.
EUROSPRAY’s products are identified by 11 alphanumeric characters.

SPRAY NOZZLES identification method - the first character is a letter that identifies the material (see table 1)
- the second character is a number that identifies the thread (1/8”-1/4”- 3/8” etc. see table 2)
- the third character is a letter that identifies if the thread is male (M) or female (F), where it isn’t specified the thread doesn’t exist (i.e. for DH - BG model) in that case don’t refer to table 2 - the fourth and the fifth characters identify the nozzle type described on “nozzle catalogue” ( for example C2 flat spray) - the sixth end the seventh characters are numerics and correspond to the capacity according to the “nozzle catalogue” (for example C2-03 MODEL 03 stand for capacity 1,20 lt. at 3 bar) in MC3E model the capacity is indicated by the seventh and eighth character (see table 3) - the eighth and nineth characters identify the spray angles according to the “nozzle catalogue” (see table 4)

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NB: The material for high pressure nozzles MC4-C4 and HP is not listed, so the article code starts with the thread or the model (Example: C4-020 - 1HP022)
* Only for flat jet

How to order
Here is an example of how to order a brass Flat Jet Nozzle (catalogue page 34 – MC2) Code: 1/8”MC2-03/110°

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