
Table A.3 Gas Gun Press. Drop vs. Burner Heat Input
• Pressure drops for natural gas, 1,000 Btu/SCF gross, 0.6 specific gravity.
• Pressure drop should be taken as differential between the chamber and gas gun
pressure tap.
A-3
1
6421 8 10 20 40 60
2
4
6
8
10
20
24
6V 8V
Burner Gross Heat Input (MMBtu/hr.)
or Natural Gas Flow (1000’s SCFH)
Gas Gun Pressure Drop ("w.c.)*
10V 12V 14V 16V
1
6421 8 10 20 40 60 100 200 300
2
4
6
8
10
20
30
45
Burner Gross Heat Input (MMBtu/hr.)
or Natural Gas Flow (1000’s SCFH)
Gas Gun Pressure Drop ("w.c.)*
36V
32V
28V
24V
22V
18V
* Nominal pressure drop at maximum capacity is 24"w.c. for
6V through 16V models, and 45" w.c. for all other models.
Note:
Fuel pressure drop curves should be used as a guide for setting up
burner. It is recommended to use a direct fuel flow measurement
(orifice plate or flow meter) for calculating actual fuel flows.
Eclipse Vortometric Burner v2.00, Installation Guide 248, 4/10/07
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