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ChangYu taught your 4 step easy to select the right nozzle

A. Nozzle selection general principles
1. Material selection: according to the composition and process media and temperature
2. Nozzle series selection: depending on the degree distribution shape, density and atomization
3. Select nozzle specifications: under flow, pressure and spray angle
II. Nozzle type express method
□ □□□ — □□□ — □□□ — □□□□
(Part I) (part II) (part III) (fourth part)
Part one: is made up of two or three uppercase letters, nozzle series
Part II: is made up of multiple digits, representing the standard nozzle
Part III: nozzle spray angle
Part IV: nozzle materials
Model example:
1. SV—1.10—600—316L
SV-spiral flow virtual cone nozzles, nozzles for 1.1, standard, spray angle of 600, nozzle materials for 316L
2. WP—47.0—1200—PVC
WP-vortex of swirling plastic solid cone nozzle, nozzle standard number 47, spray angle of 1200, nozzle material PVC (PVC)
III. Selection of nozzle materials
All usable mechanical processing or manual method of cutting, casting or molding materials are used to manufacture nozzles, such as steel, graphite, ceramics, wood, plastic and all metal materials. Choice of nozzle materials, should be used depending on the balance of strength of materials, corrosion resistance, heat resistance and heat resistance, good abrasion resistance and Machinability.
Dongguan Chang Yu spray companies using a variety of materials and material combinations to produce nozzles, if you are not sure what kind of materials you should select the application nozzles, please contact Dongguan Chang Yu spraying company, our technical staff can help you make a selection.
IV. Main factors influencing the performance of nozzle
Because the operating medium pressure, flow, temperature, viscosity, specific gravity, and surface tension are able to affect the operation of the nozzle performance, so the nozzles standard, in some water under pressure to train the standards.
1. Pressure
(1) pressure on nozzle performance the most obvious effect is to change the nozzle flow rate. In General, within the operating range of the nozzle, pressure and flow the following approximate relation:
Where: P1 and Q1 is the first State of pressure and flow
P2 and Q2 is the second State of pressure and flow
(2) pressure and nozzle diameter of the droplets: pressure increases, the droplet diameter will decrease
(3) pressure and spray angle: pressure increases, spray angle be minor changes
2. Specific gravity
Medium specific gravity also directly affects the nozzle flow. Under the same pressure, the proportion of small medium flow, generally have the following approximate relation:
QW/Q1= (R1/RW) one-second (under the same pressure)
Where: QW to water as the medium flow M3/H
Q1 operating medium flow M3/H
R1 RW water in the proportion of operations medium specific gravity
3. Viscosity
Effect of viscosity on nozzle performance is complex, affects nearly all external characteristics of nozzle, spray angle, the spray droplet diameter, volume, density, degree of atomization. So, for similar low-viscosity fluid nozzle with water, generally not considered its impact; and at the water gap of larger high-viscosity fluid nozzle, are normal measurement and simulation experiment of the nozzle is required.
4. Temperature
Temperature mainly through the viscosity and surface tension of the fluid changes to affect the performance of spray nozzles.
5. Surface tension
Effect of surface tension on nozzle performance is evident, particularly affecting droplet diameter of the nozzle and the spray angle.

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