Table 8: Effects of Pressure on Nozzle Flow Rate
Nozzle
Rating
at 100
PSI
Nozzle Flow Rates in Gallons Per Hour (Approx.)
120
PSI
145
PSI
160
PSI
175
PSI
200
PSI
300
PSI
0.4 0.44 0.48 0.51 0.53 0.57 0.69
0.5 0.55 0.60 0.63 0.66 0.71 0.87
0.6 0.66 0.72 0.76 0.79 0.85 1.04
0.7 0.71 0.78 0.82 0.86 0.92 1.13
0.8 0.82 0.90 0.95 0.99 1.06 1.30
0.9 0.93 1.02 1.08 1.12 1.20 1.47
0.9 0.99 1.08 1.14 1.19 1.27 1.56
1.0 1.10 1.20 1.26 1.32 1.41 1.73
1.1 1.20 1.32 1.39 1.46 1.56 1.91
1.2 1.31 1.44 1.52 1.59 1.70 2.08
1.3 1.37 1.51 1.58 1.65 1.77 2.17
1.4 1.48 1.63 1.71 1.79 1.91 2.34
1.5 1.64 1.81 1.90 1.98 2.12 2.60
1.7 1.81 1.99 2.09 2.18 2.33 2.86
1.8 1.92 2.11 2.21 2.32 2.47 3.03
2.0 2.19 2.41 2.53 2.65 2.83 3.46
2.3 2.46 2.71 2.85 2.98 3.18 3.90
2.5 2.74 3.01 3.16 3.31 3.54 4.33
2.8 3.01 3.31 3.48 3.64 3.89 4.76
3.0 3.29 3.61 3.79 3.97 4.24 5.20
3.3 3.56 3.91 4.11 4.30 4.60 5.63
3.5 3.83 4.21 4.43 4.63 4.95 6.06
4.0 4.38 4.82 5.06 5.29 5.66 6.93
4.5 4.93 5.42 5.69 5.95 6.36 7.79
5.0 5.48 6.02 6.32 6.61 7.07 8.66
The spray angle is determined by the size of the
combustion chamber and the gallons per hour required of
the appliance. The spray angle is important to keep the oil
from touching the sides of the combustion chamber. Table
9 shows suggested spray angles for different combustion
chambers.
Figure 21: Spray Angles
Table 9: Suggested Spray Angles for Different
Combustion Chambers
Nozzle
Size or
Rating
(GPH)
Spray
Angle
Square or Rectangular
Combustion Chamber Round
Chamber
(Diameter
in Inches)
L
Length
(in.)
W
Width
(in.)
H
Height
(in.)
C
Nozzle
Height
(in.)
0.50 –
0.65
80° 8 8 11 4 9
0.75 –
0.85
60° 10 8 12 4 *
80° 9 9 13 5 10
1.00 –
1.10
45° 14 7 12 4 *
60° 11 9 13 5 *
80° 10 10 14 6 11
1.25 –
1.35
45° 15 8 11 5 *
60° 12 10 14 6 *
80° 11 11 15 7 12
1.50 –
1.65
45° 16 10 12 6 *
60° 13 11 14 7 *
80° 12 12 15 7 13
1.75 –
2.00
45° 18 11 14 6 *
60° 15 12 15 7 *
80° 14 13 16 8 15
2.25 –
2.50
45° 18 12 14 7 *
60° 17 13 15 8 *
80° 15 14 16 8 16
3.00
45° 20 13 15 7 *
60° 19 14 17 8 *
80° 18 16 18 9 17
* Recommend oblong chamber for narrow sprays.
Information presented on nozzle
selection was taken from Delavan
Service Technician Reference Guide.
13