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48
Maintenance Section
Refill Capacities
Natural Gas
Table 15
Description
Lower calorific value
Maximum variation of LCV
Minimum methane number
Minimum methane content
Hydrogen Sulphide
Maximum humidity (relative)
Min/max. gas pressure 4006TRS
and 4008TRS engines
Min/max. gas pressure 4006TRS
and 4008TRS engines with Elek-
tra and 4016TRS
Maximum fluctuation in gas
pressure
Min/max. gas temperature
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
Requirements for the use of Natural Gas
Designation
LCV
-
-
-
H
S
2
-
-
-
-
-
Value
>31 MJ/Nm
3
<±5 percent
>75
>50 vol-percent
<100 ppm
<80 percent
15 to 50 mbar
50 to 250 mbar
3 mbar
10° to 50°C (50° to 122°F)
• Methane number
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.
SEBU8430-02
Remarks
-
During operation
Derate required below this figure
Derate required below this figure
-
At lowest inlet temperature, no
condensation in inlet manifold
and gas train allowed
At inlet to air fuel ratio regulator
At inlet to air fuel ratio regulator
Maximum rate of change of gas
pressure is 3 mbar/min, variation
frequency < 5/h
-
i02885763
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