Natural Gas
Table 15
Requirements for the use of Natural Gas
Description
Designation
Value
Remarks
Lower calorific value
LCV
>31 MJ/Nm
3
-
Maximum variation of LCV
-
<±5 percent
During operation
Minimum methane number
-
>75
Derate required below this figure
Minimum methane content
-
>50 vol-percent
Derate required below this figure
Hydrogen Sulphide
H
2
S
<100 ppm
-
Maximum humidity (relative)
-
<80 percent
At lowest inlet temperature, no
condensation in inlet manifold
and gas train allowed
Min/max. gas pressure 4006TRS
and 4008TRS engines
-
15 to 50 mbar
At inlet to air fuel ratio regulator
Min/max. gas pressure 4006TRS
and 4008TRS engines with Elek-
tra and 4016TRS
-
50 to 250 mbar
At inlet to air fuel ratio regulator
Maximum fluctuation in gas
pressure
-
3 mbar
Maximum rate of change of gas
pressure is 3 mbar/min, variation
frequency < 5/h
Min/max. gas temperature
-
10° to 50°C (50° to 122°F)
-
The gas specification requirements are to be used as
a guide only. Perkins require a full gas analysis to be
supplied at the inquiry stage of an engine order.
Engine rating depends on the methane number and
the low calorific value of the fuel and may be adapted
to suit the specifics of the fuel.
Total possible derate is calculated by adding
individual derate for:
• Charge cooler water inlet temperature
• Altitude
• Ambient temperature
• Lower calorific value
• Methane number
i02885763
Refill Capacities
Lubrication System
The refill capacities for the engine crankcase reflect
the approximate capacity of the crankcase or sump
plus standard oil filters. Auxiliary oil filter systems will
require additional oil. Refer to the OEM specifications
for the capacity of the auxiliary oil filter. Refer to this
Manual, “Maintenance Section” for more information
on fluid recommendations.
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SEBU8430-02