Eclipse Combustion AIRHEAT AH-MA - Manual (Page 15)

Eclipse AH-MA Air Heat Burner v2, Design Guide 160, 8/1/05 15
Main
Gas
Gas Manifold
Burner
Feed Pipe
Pilot
Gas
Spark
Ignitor
Flame
Rod
Burner Body
Pilot End Plate
Plain
End Plate
Pipe
Union
Pipe
Union
Pipe
Union
Sizing and layout of the gas manifold
Choose the gas manifold size to evenly supply gas to each of the
sections, using Table 3.3 and Figure 3.2.
Table 3.3 Gas Pipe Sizing & Layout
Note:
Maximum inputs shown for natural gas only. For propane,
multiply inputs by 1.5; for butane, multiply inputs by 1.7.
Figure 3.2 Gas Manifold Sizing & Layout
Example: A gas manifold is supplying gas to two 1-1/2" N.P.T. rear
inlets on a burner. Each of the rear inlets supplies a maximum of
2,000,000 Btu/hr.
Solution: The total fuel supplied is 2 x 2,000,000 = 4,000,000 Btu/hr.
Referring to Table 3.3, the choice for manifold size is 2-1/2"; the
choice for main gas pipe size is 2".
MAXIMUM MANIFOLD MAXIMUM MAIN GAS
GAS INPUT PIPE SIZE GAS INPUT PIPE SIZE
(MMBTU/HR.) (INCHES) (MMBTU/HR.) (INCHES)
1.4 1-1/2 0.3 1/2
2.5 2 0.63/4
5.2 2-1/2 1.1 1
8.0 3 3.2 1-1/2
14.0 4 6.6 2
45.0 613.0 2-1/2
80.0 8 20.0 3