DELAVAN VARI-FLO 30630 and 30637
Nozzle Size
300 PSIG
Nominal
Rating GPH
#2 Fuel Oil
By-Pass
(Return)
Closed
Model
Number
Approx.
High Fire
Rate
GPH 300
PSIG
By-Pass
(Return)
Closed
Approx.
Alternate
Nozzle
Pressure
PSIG
Approx.
GPH
Approx.
By-Pass
(Return)
Pressure
PSIG
Approx.
Firing Rate
GPH
Approx.
By-Pass
(Return)
Pressure
PSIG
Approx.
Firing Rate
GPH
Supply Pressure to Nozzle 300 PSIG at All Rates Except Alternate Firing*
Alternate Firing
Approx. High
Fire By-Pass
(Return)
Pressure
PSIG
By-Pass
Return)
Closed
Nozzle Data
35.0
#30630
35.0 157 - - 140
32.0
100
18.7
37.5
#30630
37.5 180 - - 140
28.6
100
13.8
40.0
#30630
40.0 191 - - 140
25.4
100
16.7
45.0
#30630
45.0 192 - - 140
30.6
100
16.5
50.0
#30630
50.0
185
- - - - 86
16.7
55.0
#30630 55.0
182
-
-
91
18.3
-
-
60.0
#30630 60.0
178
-
-
94
20.0
-
-
65.0
#30630 65.0
165
-
-
85
21.7
-
-
70.0
#30630 70.0
174
-
-
88
23.3
-
-
80.0
#30630 - 154 265 75 78 25.0 - -
80.0
#30637
-
-
260
74
85
24.7
-
-
80.0
#30637
-
-
280
78
90
26.0
-
-
80.0
#30637 80.0
157
-
-
65
27.0
-
-
90.0
#30637
-
-
260
83
90
27.7
-
-
90.0
#30637
-
-
280
86
85
28.7
-
-
90.0
#30637 90.0
165
-
-
80
30.0
-
-
100.0
#30637 - 136 260 93 90 31.0 - -
100.0
#30637 - 151 280 97 90 32.0 - -
100.0
#30637 100.0
165
-
-
90
32.3
-
-
125.0
#30637 - 161 260 115.0 90 38.0 - -
125.0
#30637 - 163 280 120.0 90 39.0 - -
125.0
#30637 125.0
175
-
-
90
41.0
-
-
150.0
#30637 - 161 260 140.0 90 45.0 - -
150.0
#30637 - 163 280 145.0 90 50.0 - -
150.0
#30637 150.0
175
-
-
90
56.0
-
-
* When Supply Pressure to Nozzle is Lower Than 300 PSIG the By-Pass(Return) and Firing Rates Will be Reduced Somewhat.
Consult Factory for Further Information.
* When Supply Pressure to Nozzle is Lower Than 300 PSIG the By-Pass (Return) and Firing Rates Will be Reduced Somewhat.
C
Consult Factory for Further Information.
Nozzle Size
100 PSIG Approx. High Approx. High
Nominal
Fire Rate Fire By-Pass
Rating
GPH GPH (Return) Approx. Approx. Approx. Approx. Approx. Approx.
#2 Fuel Oil
300 PSIG
Pressure
By-Pass
Firing Rate
By-Pass
Firing Rate
By-Pass
Firing Rate
By-Pass
By-Pass
PSIG
By-Pass
(Return) GPH (Return) GPH (Return) GPH
(Return)
(Return)
(Return)
Pressure Pressure Pressure
Closed
Closed
Closed
PSIG PSIG PSIG
4.5 7.5 162 120 5.0 100 4.0 70 3.0
5.0 8.5 136 120 7.0 105 6.0 75 4.0
5.5 9.2 150 130 8.0 120 7.0 80 4.0
6.0
- - - - - - - -
6.5 10.8 160 160 9.0 120 7.0 80 4.0
7.0 12.0 141 125 10.0 110 8.0 67 4.0
8.0 13.0 158 130 10.0 120 8.0 85 5.0
9.0 15.0 132 100 10.0 90 7.5 60 5.0
9.5 15.0 158 120 10.0 110 7.5 80 5.0
10.0
16.0
150
- - - - - -
12.0 20.0 154 118 16.0 94 12.0 70 8.0
14.0 23.0 160 120 17.0 100 11.0 85 8.0
16.0 26.0 144 115 17.0 100 15.0 75 10.0
18.0 30.0 165 135 22.0 110 15.0 80 10.0
20.0 32.0 160 120 24.0 100 18.0 80 14.0
22.0 36.0 155 120 27.0 100 20.0 82 15.0
24.0 41.0 144 120 30.0 100 25.0 72 15.0
26.0 43.0 150 100 35.0 100 27.0 65 15.0
28.0 47.5 148 120 40.0 100 30.0 65 16.0
30.0 51.0 138 85 40.0 75 30.0 50 17.0
35.0 60.0 175 115 40.0 90 30.0 60 20.0
40.0 68.0 115 70 45.0 50 35.0 20 23.0
45.0 76.0 166 120 60.0 85 40.0 50 25.0
50.0
85.5
- - - - - - -
DELAVAN VARI-FLO 33769
Supply Pressure to Nozzle 300 PSIG at All Rates*
Reduced Firing Rates
C33
Rev.304
