PRODUCT INFORMATION
INDEX
DATE
Dep. 8
IC-G-D-30-021e B
May 2014
FUEL SPECIFICATIONS – US NATURAL GAS
5/5
3. SUMMARY TABLE
Symbol Parameter
Limit
value
Engine/application Comments
LHV
Lower heat value
37.5 – 42 MJ/m
n
3
All Natural gas engines
Natural gas
LHV
LHV variation
<±5%
Mechanical carburetion
Readjust carburetion
<±10%
Electronic carburetion
>±10%
Electronic carburetion
Continuous gas analyzer
Continuous gas analyzer required
LHV
LHV gradient
<1%PCI/min
All Natural gas engines
MN
Methane number
>75
All Natural gas engines
P & T
Supplied gas pressure and
temperature
IC-G-D-30-007e Electronic
carburetion TECJET
50+
IC-G-D-30-040e Electronic
carburetion TECJET
52
IC-G-D-30-008e
Mechanical carburetion
Zero pressure regulator and screw
IC-G-D-30-015e
Electronic carburetion
ELEKTRA 50
IT-G-A-00-011e
All Natural gas engines
Minimum room temperature
Gas humidity
<80%
All Natural gas engines
No condensation
WetDewT
Wet gas dew point
>15º less than Tgas
All Natural gas engines
Recommended
O
2
Oxygen in gas
<2% vol.
Mechanical carburetion
Readjust carburetion
<±1% carb. point
O
2
Oxygen in gas
>2% vol.
Electronic carburetion
Continuous methane meter for automatic
setting of carburetion
>±1% carb. point
H
2
Hydrogen in gas
<12% vol.
All Natural gas engines
C4+
Higher hydrocarbons
<2% vol.
All Natural gas engines
DryDewT
Dry gas dew point
>15º less than Tamb
All Natural gas engines
@ max. supplied gas P. Recommended
H
2
S
hydrogen sulfide equivalent
<300 ppm
W/o catalytic converter
Total sulfur: H
2
S equivalent
<100 ppm
W/ catalytic converter
Cl
-
Chlorine equivalent
<80 ppm
W/o catalytic converter
F, Cl, Br, I organic and inorganic
<6.5 ppm
W/ catalytic converter
Si
Silicon and siloxanes
<7 mg/m
n
3
W/o catalytic converter
Analyze: TMOH,TMS,L2,L3,L4,D3,D4,D5
Besides, <75ppm of Si in engine oil
Nil
W/ catalytic converter
NH
3
Ammonia
<60 ppm
All Natural gas engines
Tar
Oils and tar
Condensations not
allowed
All Natural gas engines
Condensable oil vapors
Dust Solid
particles
<5
m
All Natural gas engines
Larger size not allowed.
<10 mg/m
n
3
(1-5
m)
All Natural gas engines
Summary table of natural gas fuel specifications for Kohler engines
4.1.23
O&M_2.002211.810_A_10_2016