| HOW
DO THEY WORK?
As the wet compressed air flows through
the inlet port and down the bed of desiccant, the desiccant
(silica gel) beads absorb the water vapor and aerosols.
The silica gel beads are so effective in absorption the
air humidity can be reduced down to a -40° F pressure
dew point. Unless your compressed air is exposed
to a temperature below the due point, there will be no
further condensation forming in your air lines.
The microscopic pores of each silica gel
bead are structured to attract and hold large capacities
of moisture and prevent it from traveling downstream.
After the moisture has been removed, the
dry air passes through a sintered bronze element, up the
center tube, and out the outlet port. As long as
the desiccant is replaced regularly, your equipment will
receive ultra dry, moisture-free air.
As the desiccant becomes saturated with
moisture, the dew point will begin to rise. This
is evident when the blue silica gel desiccant beads in
the sights glass change to pink, indicating the need for
desiccant replacement. Simply remove the flange and bowl
and replace with new desiccant or regenerate saturated
desiccant by heating to 275°F.
Desiccant dryers are a convenient and
cost effective means of ensuring your sensitive pneumatic
applications are never exposed to damaging moisture. Compact
in size, and no external power sources required, the Watts
Fluid-Air desiccant dryers can be used almost anywhere.
WHY WATTS DESICCANT
DRYERS?
Watts Fluid-Air desiccant dryers are the
simplest and most reliable method of insuring your sensitive
pneumatic equipment is not exposed to damaging moisture.
When air is compressed, the temperature of the air is
increased as is its capacity to hold moisture. As
the hot moist air travels downstream through the lines,
it cools, allowing the moisture to condense. After
coolers, filters, drain traps, and drip legs are effective
for removing liquid condensate. But for removing
residual water vapor and aerosols, use the Watts Fluid-Air
Desiccant Dryer.
PERFORMANCE
The flow capacities in the table are nominal
ratings provided for reference. These capacities
are recommended for minimal pressure drop and average
desiccant life.
A supply of low flow/low humidity air
will provide longer desiccant life; where as high flow/high
humidity air will require more frequent desiccant changes.
Installed in an application with intermittent
flow, Watts desiccant dryers will typically dry air for
weeks before the silica gel desiccant requires replacement
or regeneration.
RECOMMENDED INSTALLATION
- Always place a moisture separator
and/or particulate filter upstream to remove bulk liquids.
- Always place a coalescing filter upstream
to remove oil. Desiccant coated with oil will not absorb
moisture.
- A 5 micron (or smaller) particulate
filter is recommend downstream to remove desiccant dust.
STANDARD FEATURES
- Steel Bowl with Integral Sight Glass
- Zinc Body
- Sintered Bronze Elements DD15 &
DD30: 90 µM DD60: 40 µM
- Maximum Operating Temperature: 180°
F
- Maximum Working Pressure: 300 PSI
- Optimum Working Temperature: Below
100°
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