Deter Difficulties with Desiccant Dryers  Correct installation
really matters in compressed air systems.  By Chris E. Beals,
Air System Management, Inc.  Share Print Related RSS  The
ambient conditions were 95°F and 60% relative humidity, while
the compressors' discharge temperature was 117°F and the dryer
inlet temperature was 107°F. It was apparent that the coolers on
the compressors needed to be cleaned. However, the temperature
at the dryer's inlet was less than 115°F — so why wasn't the
dryer meeting its -40°F pressure dew point target?  At a
discharge temperature of 117°F, almost all the atmospheric
moisture taken in by each compressor was leaving it in vapor
form, along with oil vapor picked up as the air flowed through
the unit. In other words, the moisture separator wasn't removing
much, if any, condensate. The "no air loss" drains installed on
the filters showed us that condensate was forming in the piping
upstream of both the mist eliminator and the dryer pre-filter.
Opening a drain valve between t