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G3520B Low Emissions Gas Compression Engine

G3520B Low Emissions Gas Compression Engine

The line of G3500B engines brings versatility, uptime, and low operating cost to your gas compression operation. They deliver the lowest engine-out emissions in the industry without sacrificing performance. Ideal applications for G3500B engines include gas lift, gas gathering, and wellhead gas compression. Cat G3520B gas engine. Ratings: 1104-1286 bkW (1480-1725 bhp) @ 1200-1400 rpm are NSPS site compliant capable.

Engine Specifications

Maximum Rating



NSPS Site Compliant Capable

Minimum Rating


Ignition, Protection


Standard Equipment:

  • Air Inlet System
    • Axial Flow Air cleaner
    • Cleanable
    • Intermediate-duty with service indicator
  • Control System
    • ADEM A3 with integrated electronic throttle control
    • Control panel
  • Cooling System
    • Two-stage charge air cooling
    • Thermostats and housing
    • Engine-driven jacket and aftercooler water pump
    • Stainless steel aftercooler cores
  • Exhaust System
    • Dry exhaust manifolds
    • Dry exhaust elbow
  • Flywheels And Flywheel Housings
    • SAE No. 00 flywheel
    • SAE No. 00 flywheel housing
    • SAE standard rotation
  • Fuel System
    • 7-50 psi gas supply
    • Fuel system is sized for 800 to 1200 btu/scf (31.5 to 47.2 MJ/Nm3)
    • Electronic fuel metering valve
    • Gas pressure regulator
    • Gas shutoff valve (GSOV)
  • Ignition System
    • ADEM A3
  • Lubrication System
    • Crankcase breather — top mounted
    • Oil cooler
    • Oil filter — RH
    • Oil pan — 143 gal
    • Drain valve
    • Oil sampling valve
    • Turbo oil accumulator
  • Mounting System
    • Engine mounting rails - 330.2 mm (13 in) industrial-type
  • Power Take-offs
    • Front housing — two-sided
    • Front lower LH, RH, and upper RH accessory drives
  • General
    • Paint — Cat yellow
    • Crankshaft vibration damper and guard
    • CSA Certification, Class 1 Division 2, Group D - electrical system and instrumentation - includes ADEM A3 and control panel

Optional Equipment:

  • Air Inlet System
    • Round air inlet adaptors
  • Charging System
    • Charging alternator - CSA approved 24V, 65 A
  • Cooling System
    • Flexible connections
  • Exhaust System
    • Flexible fittings
    • Flange and expander
  • Fuel System
    • Gas filter
  • Instrumentation
    • Communications module
  • Lubrication System
    • Lubricating oil
    • Oil bypass filter
    • Air prelube pump
  • Power Take-offs
    • Front stub shaft
    • Pulleys
    • Double damper
  • Protection System
    • Explosion relief valves
    • Secondary GSOV
  • Starting System
    • Air starting motor with controls (90 psi or 150 psi)
    • API B16.3 compliant piping
    • Jacket water heater
    • Barring group
  • General
    • Special paint
    • Torsional vibration analysis
  • Eu Certification
    • EEC DOI certification
  • Support
    • Factory commissioning

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