Common Equipment failures are foot valves, injector tips, and spray nozzles

Perform a titration

  • Too low? – failure in foot valve or blockage at an injection tip or spray nozzle
  • Too high? – injector tip or spray nozzle is worn and needs replacement

Perform Draw Test

  • Too much product used? – injector tip or spray nozzle is worn and needs replacement
  • Too little product used? – failure in foot valve or blockage at injection tip or spray nozzle

Foot valve

  • Filters particles to prevent clogging of draw tube lines
  • Maintains constant suction on draw line
  • Prevents backflow of chemical into drum
  • Test for proper function – Remove draw line from drum; If chemical empties out of the line, replace foot valve

Injector tips

  • Subject to clogging as openings very small
  • Carefully Remove tip and inspect for obstruction or damage, replace if necessary

Spray nozzles

  • Create direction, spray and pressure within system
  • Replacement of nozzles is necessary when loss of pressure negatively impacts chemical coverage
Nozzle Size Orifice
Diam.
(Inches)
40
PSI
100
PSI
250
PSI
500
PSI
600
PSI
700
PSI
800
PSI
1000
PSI
1200
PSI
1500
PSI
2000
PSI
2500
PSI
300
PSI
3500
PSI
4000
PSI
02 0.034 0.20 0.32 0.50 0.71 0.77 0.80 0.89 1.0 1.1 1.2 1.4 1.6 1.7 1.9 2.0
04 0.052 0.40 0.63 1.00 1.40 1.60 1.70 1.80 2.0 2.2. 2.5 2.8 3.1 3.5 3.8 4.0
4.5 0.055 0.45 0.71 1.10 1.50 1.70 1.90 2.00 2.2 2.4 2.8 3.0 3.6 3.9 4.3 4.5
05 0.057 0.50 0.79 1.30 1.80 1.90 2.10 2.20 2.5 2.8 3.1 3.6 4.0 4.4 4.7 5.0
5.5 0.06 0.55 0.87 1.40 1.90 2.10 2.30 2.50 2.8 3.0 3.4 3.8 4.4 4.8 5.2 5.5
06 0.062 0.60 0.95 1.50 2.10 2.30 2.50 2.70 3.0 3.2 3.7 4.2 4.8 5.2 5.6 6.0
6.5 0.064 0.65 1.00 1.70 2.30 2.50 2.70 2.90 3.3 3.6 4.0 4.6 5.2 5.7 6.0 6.5
07 0.067 0.70 1.10 1.80 2.50 2.70 2.90 3.10 3.5 3.8 4.3 5.0 5.6 6.1 6.6 7.0
7.5 0.07 0.75 1.20 1.90 2.70 2.90 3.20 3.40 3.8 4.1 4.6 5.3 6.0 6.5 7.0 7.5
08 0.072 0.80 1.30 2.00 2.80 3.10 3.40 3.60 4.0 4.4 5.0 5.6 6.2 7.0 7.5 8.0
8.5 0.074 0.85 1.30 2.20 3.00 3.30 3.60 3.80 4.3 4.6 5.3 6.0 6.7 7.4 8.0 8.5
09 0.076 0.90 1.40 2.30 3.20 3.50 3.80 4.00 4.8 5.0 5.5 6.4 7.1 7.8 8.5 9.0
9.5 0.078 0.95 1.50 2.40 3.40 3.70 4.00 4.30 4.8 5.2 5.8 6.8 7.6 8.3 9.0 9.5
10 0.08 1.00 1.60 2.50 3.50 3.90 4.20 4.50 5.0 5.4 6.1 7.0 8.0 8.7 9.4 10.0
12 0.087 1.20 1.90 3.00 4.20 4.60 5.00 5.40 6.0 6.4 7.3 8.4 9.5 10.4 11.2 12.0
15 0.094 1.50 2.40 3.80 5.30 5.80 6.40 6.80 7.5 8.2 9.2 10.6 12.0 12.9 14.0 15.0
20 .0109 2.00 3.20 5.00 7.10 7.80 8.40 9.00 10.0 10.8 12.2 14.2 16.0 17.4 18.8 20.0
30 1.41 3.00 4.70 7.50 10.60 11.60 12.80 13.60 15.0 16.4 18.4 21.2 24.0 26.0 28.0 30.0
40 1.56 4.00 6.3 10.00 14.20 15.60 16.80 18.00 20.0 21.6 24.4 28.4 32.0 34.8 37.6 40.0
For specific information on your spray equipment and nozzles, contact your supplier

How to determine Nozzle size:

  • Calculate GPM and PSI to determine nozzle size
  • (Ex. 1200 PSI at 3.8 GPM = nozzle size of 07, see above chart)

After determining nozzle size, choose a degree of spray pattern:

  • 15 = 15° (narrow)
  • 25 = 25° (medium)
  • 40 = 40° (wide)

Typical available spray patterns: 05, 15, 25, 40, 50, 65, 80

  • Degree of spray does not affect nozzle volume