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neering. Engineering. Engineering. Engineering. Engineeri
Spray Coverage
SPRAY ANGLE TERMS
Four terms are commonly used to
describe spray coverage:
Spray Angle:
(A) The included angle of the spray
as measured close to the nozzle
orifice. Since the droplets are
immediately acted upon by
external forces (gravity and
moving gases, for example), this
measurement is useful only for
determining spray coverage close THEORETICAL SPRAY COVERAGE (E) IN MILLIMETERS
to the nozzle. The spray angles lis
Included Spray Distance From Nozzle Orifice (D) (mm)
ted for nozzles in this catalog are
Angle (A) 50 75 100 150 200 300 400 600 800 1000
angles at the nozzle, measured at
the nozzles design pressure. 10° 9 13 17 26 35 52 70 105 140 175
Actual Spray Coverage: 20° 18 26 35 53 71 106 141 212 282 353
(B) The actual coverage at a speci
fied distance (D) from the nozzle. 30° 27 40 54 80 107 161 214 322 429 536
Effective Spray Angle:
(C) The angle calculated from the 40° 36 55 73 109 146 218 291 437 582 728
actual coverage (B) at a distance
50° 47 70 93 140 187 280 373 560 746 933
(D) .
Theoretical Spray Coverage: 60° 58 87 115 173 231 346 462 693 924 1155
(E) The coverage at distance (D) if
the spray moved in a straight line. 70° 70 105 140 210 280 420 560 840 1120 1400
80° 84 126 168 252 336 503 671 1007 1343 1678
EXAMPLES:
Problem: To achieve a 200mm 90° 100 150 200 300 400 600 800 1200 1600 2000
diameter spray coverage from a
nozzle mounted 150mm from the 100° 119 179 238 358 477 715 953 1430 1907 2384
target, what spray angle would
110° 143 214 286 428 571 857 1143 1714 2285
be required?
Solution: 70° Spray Angle 120° 173 260 346 520 693 1039 1386 2078
Problem: How far from the target 130° 214 322 429 643 858 1287 1716
should a nozzle with a 110° spray
140° 275 412 549 824 1099 1648 2198
angle be mounted in order to
achieve a 550mm diameter spray? 150° 373 560 746 1120 1493 2239
Solution: Approximately 200mm.
(Actual coverage will be less than 170° 1143 1715 2286
theoretical coverage listed in
NOTE: Data shown is theoretical and does not take into consideration the
the table.) effects of gravity, gas flow, or high pressure operation.
NOTE: For applications where
coverage is critical, contact BETE
Applications Engineering using the
Applications Intake form on page 128.
124 www.BETE.com
Spray Coverage
SPRAY ANGLE TERMS
Four terms are commonly used to
describe spray coverage:
Spray Angle:
(A) The included angle of the spray
as measured close to the nozzle
orifice. Since the droplets are
immediately acted upon by
external forces (gravity and
moving gases, for example), this
measurement is useful only for
determining spray coverage close THEORETICAL SPRAY COVERAGE (E) IN MILLIMETERS
to the nozzle. The spray angles lis
Included Spray Distance From Nozzle Orifice (D) (mm)
ted for nozzles in this catalog are
Angle (A) 50 75 100 150 200 300 400 600 800 1000
angles at the nozzle, measured at
the nozzles design pressure. 10° 9 13 17 26 35 52 70 105 140 175
Actual Spray Coverage: 20° 18 26 35 53 71 106 141 212 282 353
(B) The actual coverage at a speci
fied distance (D) from the nozzle. 30° 27 40 54 80 107 161 214 322 429 536
Effective Spray Angle:
(C) The angle calculated from the 40° 36 55 73 109 146 218 291 437 582 728
actual coverage (B) at a distance
50° 47 70 93 140 187 280 373 560 746 933
(D) .
Theoretical Spray Coverage: 60° 58 87 115 173 231 346 462 693 924 1155
(E) The coverage at distance (D) if
the spray moved in a straight line. 70° 70 105 140 210 280 420 560 840 1120 1400
80° 84 126 168 252 336 503 671 1007 1343 1678
EXAMPLES:
Problem: To achieve a 200mm 90° 100 150 200 300 400 600 800 1200 1600 2000
diameter spray coverage from a
nozzle mounted 150mm from the 100° 119 179 238 358 477 715 953 1430 1907 2384
target, what spray angle would
110° 143 214 286 428 571 857 1143 1714 2285
be required?
Solution: 70° Spray Angle 120° 173 260 346 520 693 1039 1386 2078
Problem: How far from the target 130° 214 322 429 643 858 1287 1716
should a nozzle with a 110° spray
140° 275 412 549 824 1099 1648 2198
angle be mounted in order to
achieve a 550mm diameter spray? 150° 373 560 746 1120 1493 2239
Solution: Approximately 200mm.
(Actual coverage will be less than 170° 1143 1715 2286
theoretical coverage listed in
NOTE: Data shown is theoretical and does not take into consideration the
the table.) effects of gravity, gas flow, or high pressure operation.
NOTE: For applications where
coverage is critical, contact BETE
Applications Engineering using the
Applications Intake form on page 128.
124 www.BETE.com
