Specifications

10
Technical Specifications
CAUTION!
• Donotmisuseormodifyunderany
conditions.Misuseormodification
of this equipment may result in
personal injury.
How Does it Work? (seediagram1)
Moisturesaturatedcompressedairentersthe
coalescingprefilter(F1)whereaerosolsare
coalesced then drained via an automatic drain
system. The moist water vapor-laden inlet air
free of liquid water flows to the inlet of the dryer
throughtheAPV(AutomaticPistonValve)(V1)
which diverts the inlet air to one of the towers,
inthisexampletower(T1).Airflowsupward
through the adsorbent bed removing the moisture
vapor;thedriedairflowexitsthetowerthroughthe
outletvalve(V5)flowingtotheoutletparticulate
afterfilter(F2,recommendoption)whichremoves
particulates from the air stream. Clean and dry air
now flows to the customer process air distribution
system.
As one tower is drying air, the other tower will be
regenerating(purging)theadsorbentbed.Inthis
example,tower(T2)willberegenerating.Prior
toregeneration,theexhaustvalve(V4)isopened
and the tower is depressurized to near atmospheric
pressure, the tower will now be regenerating.
Duringtheregeneratingprocessasmallportionof
dryoutletcompressedairisused,15%onaverage
basedonstandarddesigncapacityof100psig,
100°Finletair,100°FambientairandPDPof
-40°F.Thedryregenerationairflowischanneled
through the outlet orifice to the regenerating tower
(T2)removingmoisturefromtheadsorbentbedand
existstheregeneratingtower(T2)throughexhaust
valve(V4)andexhaustmufflertoambient.After
regenerationcycleiscompletevalve(V4)closes
causingtower(T2)torepressurizetolinepressure.
Next,thetowerswillswitchwhenexhaustvalve
(V3)beginstoopencausingtower(T1)tobegin
to depressurize and regenerate, simultaneously the
inletvalves(V1)and(V2)willshiftcausingtheinlet
airflowtobedivertedtotower(T2)whichwillnow
be the drying tower. This switching process will
continue repeatedly.
The dryer control system is completely automatic
and cycles the system through the drying and
regeneration cycles. The standard cycle drying time
is5minutes,regenerationcycleis4minutes,and
repressurizingcycleis1minute.
TheAircelAHLDE-SeriesHeatlessDryer
incorporates a unique energy saving control system
to reduce purge air loss with its integrated Energy
ManagementPurgeReductionSystemwhichutilizes
a moisture sensor sampling the air from mid bed of
theon-streamdryingtower,afterthefixedpurge
time is complete the regenerating/purging tower will
repressurize.Ifthemoisturesensorsensesalow
moisture condition or low load in the drying tower,
the drying tower will remain in the drying mode
afterthefixeddryingtimecycleforanextended
period of time. The end result is an overall purge
reduction and significant energy savings.
AircelAHLDE-Series-Models1000-5000