Compressed Natural Gas for Vehicles

An open CNG station in Columbus
CNG Overview

CNG is a transportation fuel made by compressing natural gas or biogas to less than 1% of its volume. Natural gas pipelines transport natural gas to CNG stations where it passes through a gas dryer and is compressed through two to five stages of compression until it reaches a pressure of up to 4,500 psig. 

Once compressed, CNG is stored and distributed at a significantly lower cost than gasoline or diesel.  The compressed natural gas reaches a priority panel that directs into the on-site, above-ground storage vessels. Customers fill their vehicles from the dispenser, much like a conventional fueling station.


Compressed Natural Gas (CNG)

Renewable Natural Gas (RNG)

CNG Vehicles


CNG Compressors


Ariel's CNG compressors for vehicle fueling are derived from the same advanced design and industry experience as the products we manufacture for field gas, process, and transmission applications. CNG application engineering, sizing software, and CNG specific training are included at no additional charge.

Ariel compressors, one of the most robust, continuous, or intermittent duty compressors for the CNG market!


CNG Compressor Features


Utilized in NGV fueling services providing 125 to 2,000+ scfm (200 to 2,800+ nm/h), Ariel compressors are paired with drivers ranging in size from 50 to more than 1,200 BHP (37 to 895 Kw). Our extensive range of cylinder sizes allows units to operate with inlet pressures starting near zero to more than 200 psig (13.6 barg) and discharge pressures over 4,500 psig (310+ barg). 

  • Flexible, site-specific compressor configurations
  • Horizontal balanced opposed throws
  • Precision tri-metal half shell bearings for crankshaft main and crankpin bearings
  • Intermittent duty (frequent start/stop) capability and maintenance recommendations
  • Virtually vibration-free operations
  • Electric motor or gas engine drive compatible
  • Uncompromising rigid, robust crankcases allow for reduced physical footprint

Ariel Frame Operating Ranges

Compressors packaged for CNG fueling service
Icon of busses with the CNG logo
Commonly used for fleet vehicle operations
Potential NOx emissions reduction
Icon of a compressed natural gas pump
31 compressor models suited for process service

CNG Cylinder Design Features

  • Hardened Ductile Iron cylinder bodies up to 3,000 psig
  • Hardened Forged Steel cylinder bodies to 4,500+ psig
  • Partnered Tandem Cylinder configurations
  • CNG specific designs- including 10 ¾” HE cylinder, 3 5/8" SG CE, 3" SG CE, 1 ¾" SG HE
  • Efficient Valving, including large concentric valves for increased flow
  • Uncooled, Oil-cooled, glycol-cooled packing available

Explore More Compressor Applications 




Ariel provides high-value reciprocating compressors to enhance oil production, gather natural gas, or capture bio-methane gases.



Ariel compressors manufactured for processing, pipeline, and storage applications, deliver high-efficiency.

Downstream & Refinery


Moderate speed compressors operate continually for refining, petrochemical, and hydrogen projects.

Ariel Compressors


Ariel compressors run longer and provide maximum reliability in the field.