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Nozzle install distribution project


 Selection of Strainer


140x140

Hollow cone spray nozzles
When the spray pressure, spray flow rate and spray angle are the same, the average particle size of the hollow cone nozzle is the smallest. When the average particle diameter is small, the surface area of the treated workpiece is increased, and the treatment is more delicate,and it also has a large effect to the movement, and the hollow cone nozzle produces better effects on gas cooling, air humidification, metal treatment, dust control, gas cleaning, and chemical use. In the hollow cone nozzle, because the liquid is sprayed through a single hole by centrifugation, it has the largest unobstructed diameter, which is an ideal choice for liquids that are prone to sedimentation, and it can minimize the clogging.

Full cone spray nozzle
There are two types of hollow cone nozzles. The common type is equipped with built-in swirl vanes. The special type is installed without built-in swirl vanes. The full cone spray produces a uniform distribution , droplet size from medium to large . The spray area is uniform round shape, suitable for washing and rinsing, dust removal, electronic circuit board etching, cleaning.

140x140
140x140

Flat Fan spray nozzle
The fan nozzle present the liquid to be fan-jetted, and the impact force is larger than the hollow cone and full cone. In order to obtain a more uniform flow distribution when installing several fan-shaped nozzles, the distribution design is generally distributed in a mountain shape. The difference of the flow distribution, spray height, the distance of the mounting locations, spray pressure, and the nature of the liquid, If there are errors in the performance of multiple nozzles, the design and actual values will be inconsistent.


Choice of strainer


 Selection of Strainer

The nozzle will choose different strainer according to the different situation,big particle diameter will choose the big strainer, if small will choose the small one,the strainer’s size is depended on the mesh number

Factors affecting nozzle performance

Viscosity
When the liquid flow,it will occur the friction between the molecules,we call this character is stickiness,the size of stickiness Is viscosity , and it is used to characterize the resistance factor related to the properties of the liquid. The viscosity of the liquid is a major factor affecting the shape of the spray, it also has the effect to the flow rate. Compared to water,high viscosity liquid will need more high bottom limited pressure, and forming the more smaller spray angle.

Temperature 
Changing the temperature ,it can’t change the spray character, but it will be affected by the viscosity,surface tension and specific gravity.

Temperature 
The surface tension is the tension of the liquid surface layer acting on any boundary along the surface due to the unbalanced gravitational attraction of the molecular gravitational force. The nature of the surface tension is more pronounced at the low working pressure. The higher surface tension reduces the spray angle, especially for hollow cones and flat fan spray nozzles.

Increase in Operating PressureIncrease in Specific GravityIncrease in ViscosityIncrease in Fluid Temperature Increase in Surface Tension
Pattern QualityImprovesNegligibleDeterioratesImprovesNegligible
CapacityIncreases Decreases***No Effect
Spray AngleIncrease Then DecreasesNegligibleDecreasesIncreasesDecreases
Drop SizeDecreasesNegligibleIncreases DecreasesIncreases
VelocityIncreasesDecreasesDecreasesIncreasesNegligible
ImpactIncreasesNegligibleDecreasesIncreasesNegligible
WearIncreasesNegligibleDecreases**No Effect

Spray angle and cover area

The spray flow rate is roughly proportional to the square root of the spray pressure under the same medium condition. The flow rate of any nozzle under a certain pressure can calculate the flow rate of any pressure. The known spray flow rate is Q1, and the corresponding pressure is F1. When the known pressure is F2, the unknown flow Qx has the relationship

140x140


Spray Nozzle Maintenance Tips

Clean Nozzles Regularly 
Regular nozzle inspection will help identify nozzles that need cleaning to prevent problems. Nozzles should only be cleaned with soft tools or with chemicals approved for the type of nozzle material. Orifice edges and many surfaces can be easily damaged, which affects nozzle performance. New spray nozzles will always perform better than a cleaned nozzle and could save the cost of lost productivity or poor product quality. 
Finished Product Quality 
When spray nozzles are in environments that are impossible to monitor in real time, such as spray booths, a poor quality finish may indicate a closer inspection is required. 
Pressure 
A decrease in system pressure could indicate excessive nozzle wear. An increase in system pressure could indicate that some nozzles have become clogged. 
Distribution 
All nozzles have a specified spray pattern, distribution, and spray angle. If performance is not as expected, it could indicate that the nozzles are worn or plugged.

Conversion Unit Table

Length
μmmmcmminft
11x10-31x10-41x10-63.94x10-53.28x10-6
100010.11x10-33.94x10-23.28x10-3
1x1041011x10-23.94x10-13.28x10-2
1x1061x10310013.94x103.28
2.54x10425.42.542.54x10-218.33x10-2
3.05x1053.05x1023.05x103.05x10-1121
Flow Rate
L/minm3/minm3/hin3/hft3/h(US)gal/min(UK)gal/min
10.0010.063.66x1032.120.2640.22
10001603.66x1062.12x103264220
16.670.01716.10x10435.34.43.67
2.73x10-42.7x10-71.64x10-515.79x10-47.22x10-560.1x10-5
0.4724.72x1040.0281.72810.1250.104
3.790.0040.2271.39x1048.0210.833
4.550.0050.2731.66x1049.631.21
Pressure
KpaBarkg/cm2ib/in2(p,si)AtmMHgMH2o(mAg)
10.010.010.1459.87x1037.5x10-30.102
10011.0214.50.9870.7510.2
98.070.981114.220.9680.73610.01
6.890.0690.0710.0680.0520.704
1.01x1021.0131.03314.710.7610.34
1.33x1021.331.3619.31.32113.61
9.8070.0980.11.420.0970.0731
Volume
cm2LM3(KI)ft3gal(UK)gal(US)
11X10-31X10-63.53x10-52.2x10-42.64x10-4
100011X10-33.52x10-20.220.264
1X1010001353220264
2.83X10428.32.83X10-210.6230.749
4.55X1034.554.55x10-31.611.2
3.79X1033.793.79x10-31.340.8331

Water Flow and Matched Pipe DiameterWater Flow and Matched Pipe Diameter
Pipe DiameterSteel Pipe

Flow Rate(L/min) based

 on Pipe 10M & Press 

damage 0.01-0.03mpa

Pipe DiameterSteel Pipe

Flow Rate(L/min) based

 on Pipe 10M & Press 

damage 0.01-0.03mpa

ABInt.DExt.DABInt.DExt.D
6A1/8B6.510.51.3-2.240A1-1/2B41.648.6120-210
8A1/4B9.213.83-5.250A2B52.960.5215-370
10A3/8B12.717.37-1265A2-1/2B67.976.3410-700
15A1/2B16.121.712-2180A3B80.789.1680-1200
20A3/4B21.627.222-38100A4B105.3114.31200-2100
25A1B27.63438-65125A5B130.8139.82100-3600
32A1-1/4B35.742.770-120150A6B155.2165.23300-5700

Area
cm2m2in2ft2
11x10-40.1551.08x10-6
1x10411.55x10310.8
6.456.45x10-416.94x10-3
9.30x1029.30x10-21.44x1021

Others
Viscosity1p=100cP
Weight1st=100cst
1ib=0.454kg
Temperature [°F]=[°C]x5/9)+32
 [°C]=5/9[°F]-32)

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