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ALPHA SERIES
LPWG G BUILD GAS ENGINESLPWG2, LPWG3, LPWG4, LPWTG4
Power range: 5.3-40.7 kW; 7.1-54.6 bhpFull-load xed speeds:
1500, 1800, 3000, 3600 (not LPWTG4) r/min
DURABLE, RELIABLE, EASY TO MAINTAIN LIQUID COOLED, G BUILD GAS
ENGINES
BASIC ENGINE CHARACTERISTICSgas fuelled (natural gas or propane)
spark ignition 2, 3 or 4 cylinders liquid cooled naturally
aspirated or turbocharged (LPWTG4)
SPECIAL ATTRIBUTESdesigned for continuous operation in ambient
temperatures up to 40C (104F)*lean-burn combustion system for low
emissionslow fuel consumption ef cient cross- ow high swirl
cylinder head designribbed, thin-wall cast iron crankcase for quiet
operation, with service door for easy accessdeep sump
DESIGN FEATURES AND EQUIPMENT12 volt starter motor and 55 Amp
battery charging alternatorcarburetor altronic CD1 ignition system
secondary gas pressure regulator gas fuel solenoid valve full ow
spin-on lubricating oil lter gear driven positive displacement type
lubricating oil pumpelectronic governing radiator with fan and belt
guard * ywheel with ring gear; 7.5" drive face (heavy ywheel for
1500/1800 r/min)SAE 5 ywheel housing *(SAE 4 optional)
standard skid base packing heavy duty air cleaner exhaust
manifold (top outlet) service free hydraulic valve tters integral
hold-down feet for base mounting 250-hour service intervals
operators' handbook
OPTIONAL ITEMSoil cooler 24V battery charge alternator extended
warranty
See also items with asterisk under Design Features and
Equipment.A range of options allows you to select a speci cation
that matches your requirements; please consult your Lister Petter
distributor.
LPWG GAS ENGINE
* Optional items standard on most builds
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LPWG G BUILD GAS ENGINES TECHNICAL DATA SHEET
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Natural GasNominal 1037 BTU/ft30.601 Speci c Gravity
Propane GasNominal 2588 BTU/ft31.552 Speci c Gravity
Model Power r/min 1500 1800 1500 1800
LPWG2Continuous
kWm 5.3 6.8 6.2 7.9bhp 7.1 9.1 8.3 10.6
Fuel StopkWm 5.8 7.5 6.8 8.7
bhp 7.8 10.0 9.1 11.7
LPWG3Continuous
kWm 9.9 12.3 11.3 14.0bhp 13.3 16.5 15.1 18.7
Fuel StopkWm 10.9 13.6 12.4 15.4
bhp 14.6 18.2 16.6 20.6
LPWG4Continuous
kWm 13.2 16.4 15.0 18.6bhp 17.7 22.0 20.1 25.0
Fuel StopkWm 14.5 18.1 16.5 20.5
bhp 19.5 24.2 22.1 27.5
LPWTG4Continuous
kWm 16.6 20.9 18.9 23.8bhp 22.3 28.0 25.3 31.9
Fuel StopkWm 18.3 23.1 20.8 26.2
bhp 20.8 31.0 27.8 35.1
FIXED SPEED: POWER OUTPUTS TO ISO 3046
Natural GasNominal 1037 BTU/ft30.601 Speci c Gravity
Propane GasNominal 2588 BTU/ft31.552 Speci c Gravity
Model Power r/min 3000 3600 * 3000 3600 *
LPWG2Continuous
kWm 9.4 10.2 11.0 11.9bhp 12.6 13.7 14.8 16.0
Fuel StopkWm 10.3 11.2 12.1 13.1
bhp 13.8 15.0 16.2 17.6
LPWG3Continuous
kWm 17.6 18.6 20.1 21.1bhp 23.6 25.0 27.0 28.3
Fuel StopkWm 19.4 20.5 22.1 23.2
bhp 26.0 27.5 29.6 31.1
LPWG4Continuous
kWm 23.4 24.8 26.7 28.1bhp 31.4 33.2 35.8 37.7
Fuel StopkWm 25.7 27.3 29.4 31.0
bhp 34.5 36.6 39.4 41.6
LPWTG4Continuous
kWm 32.5 - 37.0 -bhp 43.6 - 49.6 -
Fuel StopkWm 35.8 - 40.7 -
bhp 48.0 - 54.6 -
* Engines operating at 3600rpm are offered for standby duty
only. For further information and approval please contact Lister
Petter Applications Department.
FIXED SPEED: POWER OUTPUTS TO ISO 3046
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LPWG G BUILD GAS ENGINES TECHNICAL DATA SHEET
LPWG2 LPWG3 LPWG4 LPWTG4
Number of cylinders 2 3 4 4
Type of ignition Spark ignition
Aspiration Natural Turbocharged
Direction of rotation, looking on the ywheel end Anti
clockwise
Nominal cylinder boremm 86.0 86.0 86.0 86.0
in 3.38 3.38 3.38 3.38
Strokemm 80.0 80.0 80.0 80.0
in 3.15 3.15 3.15 3.15
Total cylinder capacitylitres 0.930 1.395 1.860 1.860
in3 56.75 85.13 113.50 113.50
Firing order 1 - 2 1 - 2 - 3 1 - 3 - 4 - 2 1 - 3 - 4 - 2
Number of ywheel ring-gear teeth 96 96 96 96
Gear-end power take-off (subject to Lister Petter approval)
Maximum inlinekW 12 12 12 12
bhp 16 16 16 16
Maximum side load using a drive belt
kW 0.8 0.8 0.8 0.8
bhp 10.7 10.7 10.7 10.7
Maximum continuous crankshaft end thrustkgf 180 180 180 180
lbf 400 400 400 400
Lubricating oil capacity (including lter)liters 5.85 8.25 11.5
11.5
US gallons 1.55 2.18 3.03 3.03
Lubricating oil pressure at 1800 r/min with the oil at 110 C
(230 F)
bar 1.8 1.8 1.8 1.8
lbf/in2 26 26 26 26
Lubricating oil pressure at idlebar 1.0 1.0 1.0 1.0
lbf/in2 14.5 14.5 14.5 14.5
Angles of inclination (any direction)Permanent 20 20 20 20
Temporary 25 30 30 30
Combustion air required@1800 r/min
l/s 12 18 24 35
ft3/min 25 38 50 75
Alternator output Amps 55 55 55 55
Starter motor power kW 1.4 1.4 2.0 2.0
Starter motor battery cold cranking performance rating to BS
3911 Part 2
Amp @ -8C (18F) 210 345 380 380
Amp @ -18C (0F) 350 600 670 670
Minimum starting temperature without additional aids*C -15 -15
-15 -15
F 5 5 5 5
TECHNICAL DATA
* Consult Lister Petter concerning cold start performance
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LPWG G BUILD GAS ENGINES TECHNICAL DATA SHEET
Lister Petter have made efforts to ensure that the information
in this data sheet is accurate but reserve the right to amend
specif ications and information without not ice and without obl
igat ion or l iabi l i ty.
DISTRIBUTORS ADDRESSUKLISTER PETTER LIMITED
Long Street, Dursley, Gloucestershire, GL11 4HS, EnglandTEL: +44
(0)1453 544141; FAX: +44 (0)1453 546732
E-mail: [email protected] www.lister-petter.co.uk
UAELISTER PETTER FZE
Dubai Silicon Oasis Headquarters, PO Box 341077, Dubai, UAE
TEL: +971 4 372 4331; FAX: +971 4 372 4318 E-mail:
[email protected]
www.lister-petter.co.uk
P027-08503, MAY 2013
LPWG2 LPWG3 LPWG4 LPWTG4
Dry weightkg 112 150 180 222
lb 247 330 396 498
Length (A)mm 496 596 696 930
in 19.5 23.5 27.4 36.6
Width (B)mm 470 470 470 565
in 18.5 18.5 18.5 22.2
Height (C)mm 685 685 685 685
in 27.0 27.0 27.0 27.0
APPROXIMATE DIMENSIONS AND WEIGHT
RATINGS DEFINITIONS TO ISO 3046ISO Standard ConditionsBarometric
pressure 100 kPaRelative humidity 30%Ambient air temperature at the
inlet manifold 25 C
1. Fixed Speed - Continuous Power (ICN)The power in kW which the
engine is capable of delivering continuously at the stated
crankshaft speed, under ISO 3046 standard conditions, measured at
the flywheel without power-absorbing accessories, provided that the
engine is overhauled and maintained in good operating condition and
that fuel to BS EN
590 Class A1 or A2, and lubricating oils to the correct
performance speci cation and viscosity classi cation as recommended
by Lister-Petter Limited are used.
2. Fixed Speed (Fuel Stop) - Overload Power (ICXN)The maximum
power in kW which the engine is capable of delivering
intermittently at the stated crankshaft speed for a period not
exceeding one hour in any period of twelve hours of continuous
running, immediately after working at the continuous power, under
ISO 3046 standard conditions and with the provisions speci ed for
continuous power in item ( 1 ) above, but with the fuel limited so
that the fuel stop power cannot be exceeded.
3. Fixed Speed Power - Continuous Power, StandbyThis rating is
applicable for supplying emergency power in variable load
applications. Overload is not allowed.
4. DeratingFor non-standard site conditions, reference should be
made to relevant BS, ISO & DIN standards.
Notes: 1. Power ratings measured at the ywheel apply to a fully
run-in, non derated engine without a radiator and fan tted, and
without power absorbing accessories or transmission equipment. 2.
The overload capability applies to a fully run-in engine. This is
normally attained after a running period of about 50 hours. 3.
Excluding radiator.
