QSL9G Gas Compression Applications Spec Sheet0 pages

QSL9G
Gas Compression Applications

Wellhead compression applications require reliability
and durability not found in every natural gas engine.
For dependable low emission operations and world
class support, you need Cummins QSL9G – an
emissions compliant, high-performance natural gas
engine that shares the proven heritage of the Cummins
C Series diesel engines and many of the same heavyduty components. You can depend on the QSL9G to
stay emissions compliant, keep maintenance costs
down and the gas flowing. Every day.

General Specifications
Inline 6-cylinder, 4-Cycle, Natural Gas
Bore

4.49 in (114 mm)

Stroke

5.69 in (144.5 mm)

Displacement

8.9 L (543 cubic in)

Engine Power*

175 hp (131 kWm)

Compression Ratio

9.7:1

Aspiration

Turbocharged and
aftercooled

Exhaust Type

Wet manifold

Weight**

1650 lb (748 kg) - TBD

Coolant Capacity

2.9 gal (11 L)

Lube Oil Capacity

8.0 gal (30.3 L)

Rotation

CCW From Rear

* Rating dependent
** Weight is approximate and varies with options.
COMPLIANT CAPABLE – This engine is capable of
meeting the SI NSPS regulations from the factory. However,
the owner/operator is required to conduct site compliance
testing and submit documentation per the EPA SI NSPS
requirements. Engines with the “E” designation include a
factory-supplied air/fuel ratio controller and a Cummins
Emission Solutions Three-Way Catalyst.

Features
Designed for the oil and gas market, the QSL9G
delivers exceptional dependability and low cost of
operation.
Base Engine – Most major components, including
block, crank and liners are common with the proven
L series diesel. Upgraded power cylinder for natural
gas operation.
Emissions – Rich burn combustion matched with a
Cummins 3-way catalyst delivers NSPS compliant
emissions down to 0.5 gr/hp hr NOx.
Air/Fuel Ratio Control – Oxygen sensor-based
air/fuel ratio controls emissions rate. Digital display
shows O 2 , fuel control valve position, fault codes,
other engine parameters and provides for user
input.
Air Handling – Turbocharged and aftercooled
design delivers reliable performance up to 5,000
feet without derate.
Fuel System – AFR control system provides stable
operation through all load ranges.
Speed Control – ECM based speed control with
integrated throttle body provides precise and stable
speed control under all load conditions.
Ignition System – Cummins Ignition Module
provides precision timing control and delivers
proven reliable performance through all load
conditions.
Lubrication System – High-capacity oil pan and a
larger, more efficient cooler reduce maintenance
costs and extend service intervals.
Commonality – All electronic Cummins gas
compression engines utilize common AFR control
components and strategy to minimize parts and
maximize technician effectiveness.
Warranty – Cummins one year, unlimited hours.
Backed by a worldwide distributor network.