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.