The newest version of air dryer to use Graham-White's innovative technology to produce clean, oil-free, dry compressed air for use in locomotives, the 994-500 offers 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 | 45 to 85 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 |
Illustration may not depict actual product specifications.
