Locomotive Air Dryers - 994-500 Series
Locomotive Air Dryers - 994-500 Series

A Lower-cost Alternative for Locomotives Operating in the Range of 3,000 - 4,000 hp.

The 994-500 is fully interchangeable with the "life cycle cost saving" 994-100 series and has half the moving parts of the original 975 Series line, saving the customer both initial and upkeep expense.

Technical Specifications:

  • Operation: Twin tower, pressure swing regeneration, 65 second cycle per tower (48 sec regeneration & 17 sec repressurization) - one complete cycle each 130 sec\
  • Desiccant: Material:Activated Alumina - in bags
  • Pressure: Max system pressure - 150 psig (10.0 bar)
  • Temperature: -40 deg. F to +160 deg. F (-40 deg. C to +70 deg. C) Heater is included as a standard feature
  • Inlet Flow: 100 scfm nominal (2826 l/min)
  • Self-Adjusting Purge Valve: Automatically meters the proper amount of regeneration air based on inlet conditions. Eliminates wasted purge air at low flows and maximizes dryer performance at high flows.
  • Pressure Drop: 5 psig max (less coalescer) at 100 scfm @ 100 psig & 105 deg. F
  • Coalescing Filter Rating: 99.9% efficiency @ 0.3 microns
  • Voltage: 18 to 138 VDC (74 VDC nominal) - able to handle surges up to 138 VDC
  • Current: 0.5 A max @ 74 VDC (heater off)
  • 10 A max @ 74 VDC (heater on)
  • Electrical Connection: Quick disconnect
  • Exposure: Resistant to direct water spray and damage from flying debris
  • Shock: 10 g in all 3 axis
  • Vibration: Meets or exceeds both GETS & EMD requirements for OEM products
  • Fatigue: NFPA T2.6.1-1974, cyclical category 3/90 @ 140 psig
  • EMI: Meets or exceeds both GETS & EMD requirements for OEM products
  • Size: 29" W x 24.22" H x 16.5" L
  • 737 mm W x 615 mm H x 419 mm L
  • Weight: 155 lbs (45 kg) - Dryer only 75 lbs (34 kg) - Mounting bracket only
  • Options: Muffler
  • Memory: Timer
  • Multi-Language Labels

Related Products

AirSmart™ Air Dryer 994-600 Series
AirSmart™ 994-600 Series

Equipped with patented, and the most advanced air dryer technology available, this series is designed to deliver innovative solutions and unmatched performance.

Locomotive Air Dryer - Twin Tower 975 Series
Twin Tower 975 Series

The most widely used and dependable regenerative pressure swing dryer system in the North American railroad industry

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