The Ingersoll Rand Model 20H40NGDX is a duplex self-contained compressor package that includes carefully matched components that are pre-piped, prewired, tested and proven reliable in operation. With an inlet gas pressure of 20 psig, the 20H40NGDX will have a flow capacity of 116 scfm and a design pressure of 5,000 psig.


The package shall include two (2) air-cooled Ingersoll Rand natural gas compressor engineered specifically for refueling applications. The multistage compressor is complete with cooling fan, inter-stage intercoolers and after coolers, ASME relief valves and separators.

Electric Motor Drive

The package shall include two (2) 1800 rpm, totally enclosed, explosion-proof electric motors rated for 230/460 volt, 3 phase, 60 Hz. The motors shall be complete with V-belt drive, belt tightener, full-voltage motor starter and totally enclosed metal belt guard with antistatic belts. Alternative electrical configurations are available upon request.

Inlet System

A threaded Inlet gas connection complete with pulsation tank, coalescing filter and solenoid valves is standard on each package.

Automatic Condensate Drain System

An automatic condensate drain system regularly dumps liquids collected by separators into a gas recovery tank at user-selected intervals. 

Gas Recovery System

Closed loop vent recovery system with ASME tank, ASME relief valve, pressure gauge and manual drain valve.

 Safety Controls

The Ingersoll Rand package includes the following electric shutdown controls as standard trim:

Low/high inlet (suction) pressure, high discharge pressure, discharge control pressure, high fourth stage discharge temperature, excessive motor starts, low crankcase oil level, main motor/starter overload and emergency shutdown switch.

Discharge System

The discharge system includes priority (back pressure) valve and coalescing filter with stainless steel discharge tubing.

Control Panel with PLC

The Ingersoll Rand package includes a Frank W. Murphy CNG Level II control panel for automatic start/stop operation. The panel, as well as the entire package, is rated for NEC Class 1, Group D, Div 2. The panel includes the following: Murphy Swichgauges, LCD annunciator panel (system status display) including first out alarm, hour meter, keyed off/auto switch displayed in a weather tight panel and alternating lead/lag control. Additional features are available.

Please contact us below for more information.

Design Standards

Ingersoll Rand’s package design complies with the NFPA 52 Standard for CNG Vehicular Fuel Systems. All electric devices and wiring comply with NFPA 70 National Electrical Code and are NEC rated Class 1, Group D, Division 2.


Compressor cylinders are hydrostatically tested to 1.5 times working pressure. Compressor block test include immersion leak and functional air testing.


The complete compressor package is shipped fully assembled on a ridgid structural steel baseplate complete with lifting slots and eyes. The package is ready to install with simple electrical connection and interconnections for gas inlet and gas discharge. 


Ingersoll Rand provides three (3) complete Operation and Maintenance manuals detailing the package. This includes wiring diagrams, flow sheets, dimensional prints, operation and servicing instructions and parts breakdown. 

Aftermarket Parts and Service Support

Ingersoll Rand inventories genuine IR aftermarket parts to support equipment in the field. These parts are warehoused in the United States and are readily available for shipment. IR is very proud of their CNG product line and supports their customers through an extensive service network of Ingersoll Rand certified technicians.

In addition, Ingersoll Rand has partnered with P. C. McKenzie Company to provide complete NGV refueling station solutions. This includes station design, application, maintenance and parts support.


Jaycox Construction CNG is an Authorized P.C. McKenzie Ingersoll Rand CNG Equipment Sales and Service Provider