Nozzle Spacing and Minimum Spray Heights
    


Nozzle Spacing
If the nozzle spacing on your boom is different than those tabulated, multiply the tablulated GPA (l/ha) coverages by one of the following factors.

 

         

20" (50 cm)
Nozzle Spacing

30" (75 cm)
Nozzle Spacing

40" (100 cm)
Nozzle Spacing

 Other Spacing 
 inches (cm)

 Conversion 
 Factor

 Other Spacing
 inches (cm)

 Conversion 
 Factor

 Other Spacing
 inchese (cm)

 Conversion 
 Factors

8 (20)

2.5

26 (40)

1.15 (1.88)

28 (70)

1.43

10 (25)

2

28 (45)

1.07 (1.67)

30 (75)

1.33

12 (30)

1.67

32 (50)

.94 (1.5)

32 (80)

1.25

14 (35)

1.43

34 (60)

.88 (1.25)

34 (85)

1.18

16 (40)

1.25

36 (70)

.83 (1.07)

36 (90)

1.11

18 (45)

1.11

38 (80)

.79 (.94)

38 (95)

1.05

22 (60)

.91 (.83)

40 (90)

.75 (.83)

42 (105)

.95

24 (70)

.83 (.71)

42 (110)

.71 (.68)

44 (110)

.91

30 (75)

.66

44 (120)

.68 (.63)

48 (120)

.83

 

  Suggested Minimum Spray Heights
 

The nozzle height suggestions in the table below are based on the minimum overlap required to obtain uniform distribution. However, in many cases, typical height adjustments are based on a 1 to 1 nozzle spacing to height ratio. For example, 110° flat spray tips spaced 20 inches (50 cm) apart are commonly set 20 inches (50 cm) above the target.

 

 

Tip

Nozzle Height in Inches (cm)

Spray
 Angle

Nozzle Spacing
20" (50 cm)

Nozzle Spacing
30" (75 cm)

Nozzle Spacing
40" (100 cm)

 TeeJet Standard, TJ

65°

22-24" (75)

33-35" (100)

NR*

 TeeJet, XR, TX, DG, TJ

80°

17-19" (60)

26-28" (80)

NR*

 TeeJet, XR, DG, TT, TTI, TJ,
 DGTJ, AI, AIXR

110°

16-18" (40)

20-22" (60)

NR*

 FullJet

120°

10-18" (40)**

14-18" (60)**

14-18" (75)**

 FloodJet, TK, TF

120°

14-16" (40)***

15-17" (60)***

18-20" (75)***


 
   *   Not recommended.
 **   Nozzle height based on 30° to 45° angle of orientation.
***     Wide angle spray tip height is influenced by nozzle orientation. The critical factor is to achieve a double spray pattern overlap.


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