Download Brakemaster® air dryers

Turbo-2000 normal operation/cycles – use with Turbo boosted compressors
Air flows from the compressor into the air dryer. Air flows past filters and desiccant bed,
stripping moisture and contaminants from the air and exits dryer to the purge tank and to the
wet tank. The reservoir line from the wet tank to the governor is always pressurized.
When pressure reaches cut-out (typically 120-125 psi), the governor sends an air signal
through the governor line to the air dryer opening purge valve and closing turbo valve. The
check valve is closed via back pressure from the wet tank. Then, air in the purge tank re-enters
the dryer and passes through the desiccant bed taking away moisture, and is expelled out the
bottom of the air dryer. Turbo boost from the compressor is checked at inlet of the dryer with
closed turbo valve. E-Type dryers provide back pressure to the compressor during stand-by. This
feature is not intended for use for any compressor other than Holset E-Type compressors.
When the pressure drops to cut-in (typically 90-95 psi), the air in the UNL line evacuates out
the exhaust port of the governor closing purge valve and opening turbo valve and once again
flows from the compressor into the air dryer.
Charge cycle
Clean/dry air
Atmospheric pressure
Purge cycle
Dirty/wet charged air
Dirty/wet purged air
Note: Approx. 95PSI gov cut in, 120PSI gov cut out
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