Tech Notes

Classified Area Compliant Oil-Free Rental Air Packages

AirNow Industrial Compression Services can respond quickly to meet classified area rental air requirements.

Below are the details of a recent project in which AirNow was involved to replace a failed plant air compressor in a refinery environment. Following some package modifications the unit was inspected for electrical compliance for installation in a Class I, Division 2 Hazardous location.

Rental Air Compressor Project

Oil-Free Plant Air Replacement

Intended Area Classification: Class I, Div. 2, Group D

Project Detail

Furnished By AirNow Compression Services

  • 4 Stage Oil-Free Centrifugal Air Compressor
  • 4160V Main Drive Motor
  • 1.5 HP Pre-Lube Pump Motor - Code M - TE Enclosure
  • 110V Control Panel Power via Mounted Control Voltage Transformer
  • All Wiring in EMT Rigid Conduit or Seal Tight Flexible Conduit
  • Seal off fittings used on all conduit entries to Compressor Main Control Panel, Auxiliary 480v Contactor Enclosure and 480v Disconnect.
  • Compressor Main Control Panel Enclosure - NEMA 4X - Purged
  • Auxiliary 480v Contactor Enclosure  NEMA 4X Purged
  • 480V Disconnect Enclosure NEMA 4X Purged
  • Vibration Transmitter Enclosure NEMA 4X
  • Z-Purge System
  • NEMA 4 Instruments and Control Devices

Furnished By Refinery Owner

  • 4160/3/60 Electric Supply to Main Driver
  • 480/3/60 Electric Supply for Auxiliary Power
  • 4160v Main Motor Starter
  • 24 SCFM @ > 80 PSI Clean Dry Instrument Air 
  • Cooling Water Supply

See the pictures of unit shipping and sample of available electrical certification below.


Click here to view a "Sample Certification".



AirNow Industrial Compression Services
1440 N. Central Expy, Suite 1010
Dallas, TX 75231
Phone: 1-972-861-1200