Baldor GLC30 Installation & Operating Manual page 39

Example: Determining Pipe Size for Natural Gas
A generator has a 16Hp engine 60 feet from the supply.
Determine the supply pipe size for Natural Gas fuel.
16 x 10,000 = 160,000 BTU's / per hour for proper operation.
160, 000
1, 096
From Table 3-6, a 60 foot run requires a minimum 1" pipe at full engine load.
Natural Gas Connections
The incoming pressure must be 11 inches water column (6 oz. pressure).
Table 3-5 Natural Gas Flow Rate (Cubic Feet per Hour) per Pipe Length
Pipe
Length Length
"
1 /
(Feet)
2
15 73
30 50
45 41
60 37
75
90
105
120
150
180
210
240
270
300
Note: Almost all operation problems are related to the installation techniques used. Do Not
MN2408
+ 146 cubic feet per hour.
" " "
3 / 1 1– 1 /
4 4
165 332 722
115 232 515
95 191 418
83 166 366
74 149 332
67 137 298
63 126 274
115 260
105 233
96 216
89 197
183
171
164
guess, be sure pipe size is adequate for required flow rate.
1. Connect the proper size gas pipe at the Inlet Connection to the Fuel Lock Solenoid.
Connect the Natural Gas pipe line shown in Figure 3-3 using the correct size pipe for
the required flow rate and length of pipe. Refer to Table 3-5 for pipe size. Be certain
that all connections are sealed and no leaks are present. The installer must ensure
that all gas connections comply with all building codes.
2. Verify Fuel Supply Pressure
Prior to initial operation of generator, verify that fuel system pressure is 11" Water
Column (6 oz. pressure) and fuel pipe sizes comply with Table 3-5.
3. Proceed to Electrical Connections.
Figure 3-3 Gas Line Connections
Iron Pipe Size
" " "
1– 1 / 2 2– 1 /
2 2
1174 2386 3704
818 1712 2646
673 1419 2213
587 1241 1924
524 1077 1684
433 962 1501
885 1376
404 827 1289
366 750 1174
337 693 1077
308 635 991
289 596 933
274 558 875
260 524 827
" " "
3 4 6
6253 13352 37229
4521 9331 26330
3752 7600 22462
3319 6542 18595
2886 5772 16652
2597 5291 15200
2357 4906 14064
2213 4618 13160
2011 4185 11775
1876 3848 10736
1712 3559 9937
1616 3357 9235
1520 3127 8658
1433 2886 8177
Receiving & Installation 3-7
"
8
53728
43867
37999
33959
31025
28715
26859
24050
21934
20298
18990
17903
16998