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3‐8 Receiving & Installation MN2408
Example: Determining Pipe Size for LPV
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
2, 516
Ă +Ă 63.5ĂcubicĂfeetĂperĂhour.
From Table 3‐6, a 60 foot run requires a minimum 1” pipe at full engine load.
LP Vapor Connections (vapor withdrawal only)
The LPV connections should only be made if your generator is setup to run on LPV. If it is setup
to run on Natural Gas, contact your Baldor representative and do not continue with installation.
The incoming pressure must be 11 inches water column (6 oz. pressure).
Table 3‐6 LP Vapor Flow Rate (Cubic Feet per Hour) per Pipe Length
Pipe
Length
(Feet)
Iron Pipe Size
1
/
2
3
/
4
1 1-
1
/
4
1-
1
/
2
2 2-
1
/
2
3 4 6 8
15 48 109 218 475 772 1570 2437 4115 8786 24497 50007
30 33 76 153 339 538 1127 1741 2975 6140 17325 35353
45 27 63 126 275 443 934 1456 2469 5001 14781 28865
60 24 54 110 241 386 817 1266 2184 4304 12236 25004
75 49 98 218 345 709 1108 1899 3798 10957 22345
90 44 89 196 310 633 987 1709 3482 10001 20414
105 41 83 180 285 582 905 1551 3228 9254 18895
120 76 171 266 544 848 1456 3038 8659 17673
150 69 153 241 494 772 1323 2754 7748 15825
180 63 142 222 456 709 1234 2532 7064 14432
210 58 130 202 418 652 1127 2342 6439 13356
240 120 190 393 614 1063 2209 6077 12405
270 113 180 367 576 1000 2057 5697 11780
300 108 171 345 544 943 1899 5381 11179
Note: Almost all operation problems are related to the installation techniques used.
Do Not guess, be sure pipe size is adequate for required flow rate.
1. Connect the proper size gas pipe at the input to the LP Vapor regulator. Connect the
LPV pipe line shown in Figure 3‐3 using the correct size pipe for the required flow rate
and length of pipe. Refer to Table 3‐6 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 3‐6.
3. Proceed to Electrical Connections.