Spray nozzles & systems

What surface should the spray cover? How should the nozzle be positioned?

The position of the nozzle over the target (D) and the area to be covered by the spray (B) are important to know in order to choose the right spray angle (A). The spray angle is measured near the nozzle orifice and the droplets are immediately affected by external forces such as gravity, air and gas flow.

Four parameters are used to define spray coverage

Spray angle (A)

The spray angle is measured near the orifice of the nozzle. Since droplets are immediately affected by external factors (gravity, air and gas flow), this measurement is only useful when calculating spray coverage near the nozzle.

To calculate spray coverage at greater distances, we provide spray trajectory diagrams if needed.

Actual spray coverage (B)

Actual spray coverage at a specified distance (D) from the nozzle.

Effective spray angle (C)

The angle calculated from the actual coverage (B) at a distance (D).

Theoretical spray coverage (E)

The coverage at distance (D) if the spray moved in a straight line from the nozzle orifice.

Distance (D) in mm
Spray angle (A) 50 100 150 200 300 400 600 800 1000
10° 9 17 26 35 52 70 105 140 175
20° 18 35 53 71 106 141 212 282 353
30° 27 54 80 107 161 214 322 429 536
40° 36 73 109 146 218 291 437 582 728
50° 47 93 140 187 280 373 560 746 933
60° 58 115 173 231 346 462 693 924 1155
70° 70 140 210 280 420 560 840 1120 1400
80° 84 168 252 336 503 671 1007 1343 1678
90° 100 200 300 400 600 800 1200 1600 2000
100° 119 238 358 477 715 953 1430 1907 2384
110° 143 286 428 571 857 1143 1714 2285
120° 173 346 520 693 1039 1386 2078
130° 214 429 643 858 1287 1716
140° 275 549 824 1099 1648 2198
150° 373 746 1120 1493 2239
170° 1143 2286

Optimising the spray coverage

When we design a spray system that requires coverage over a large cross-sectional area, the spray is optimised to provide the most even coverage possible over the entire area.

Contact us if necessary.