Graham White 5995-002 Twin Tower Desiccant Air Dryer (r62)

Item is new and in good condition

Item is used in Graham White 995 Twin Tower Air Dryer for locomotive applications

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M.F.O Revised SAO 8/7/26


The 995 Twin Tower Air Dryer System was designed to fit inside the D-4 compressor frame commonly used in the rail transit industry. Optional mounting brackets allow for customer-specific applications. Water in transit compressed air systems causes corrosion, washes away lubrication and freezes in cold weather.

Technical Specifications

Operationtwin tower, pressure swing regeneration, desiccant dryer; 60 second cycle per tower (48 sec, 12 second repressurization)
Desiccant MaterialActivated alumina
Pressure0-150 psig (0 to 10 bar) operating
Temperature-40° F to +150° F (-40° C to + 65° C) with optional heaters
Inlet Flow28 SCFM nominal(791 l/min), 35 SCFM maximum (989 l/min)
Pressure Dropnot exceeding 5 psig (0.3 bar) at 28 SCFM (791 l/min) across entire assembly
Coalescer Filtration Rating99.9% efficiency @ 0.3 micron aerosol
Final Filter Rating25 micron MFP (Mean Flow Pore) size
MufflerPrefilter exhausts
Operating Voltage24 to 45 VDC (other ranges available upon request)
Current0.3 A nom. @ 37.5 VDC 8.0 A nom. @ 37.5 VDC w/ two 150 Watt Heaters
Electrical ConnectionsHard-wired through water-tight conduit fitting or optional electrical connector
ExposureIP56 rating
Vibrationpassed IEC 61373:1999; BS7608:1993 - 5g lateral, 3G vertical
FatigueNFPA T2.6.1-1974, cyclical category 3/90
Hydrostaticrated 55 bar
EMI/Electrical Protection: Conducted emissions* EN 55011:1991 Conducted immunity:
* ENV 50121-3-2:1996 Radiated emissions:
* ENV 50121-3-2:1996 Electrostatic discharge:
* ENV 50121-3-2: 1996 Surge voltage:
* EN 50155 Transients:
* EN 50155 Transient burst test: BRB/RIA 12
Noise< 70 dBA @ 5 meters (impulse rating)
Size20.5"(520mm) X 18.0"(457mm) X 10.5"(267mm) (L X H X D) approximately
Weight75 lbs. (34.02 kg) Approximately