2
1.0 Installation
A. Where Used/Air Quality After Filtration
Grade
Where used
Solid particle
removal (maximum
size in microns)
Liquid removal
efficiency (at
rated conditions)
Maximum inlet
liquid loading
ppm w/w
Remaining
oil content
ppm w/w
11
Separator - downstream of an aftercooler
Point-of-use - where no aftercooler is installed
upstream
—
95% of water
30,000
bulk liquids
—
9
Separator - downstream of an aftercooler
Point-of-use - where no aftercooler is installed
upstream or as prefilter to refrigerated dryer
3
99+% of water
25,000
aerosols &
bulk liquids
5
aerosols
7
Prefilter -
• Prefilter to Grade 3 & Grade 5 - high efficiency
coalescing filters
Point-of-use - where aftercooler is installed
upstream
1
100% of water
2,000
aerosols
1
aerosols
6
Afterfilter - downstream of a pressure-swing
(heatless) desiccant dryer
• Downstream of an Activated Carbon or
Desiccant Tower
1
No liquid should be
present at inlet
No liquid should be
present at inlet
—
5
Prefilter
• Ahead of desiccant and membrane dryers
Afterfilter
• Downstream of refrigerated dryer
• Downstream of pressure-swing (heatless)
desiccant dryers for finer solid particle removal
• Oil removal at point-of-use
0.01
99.99+% of oil
1,000
aerosols
0.008
aerosols
3
Prefilter - ahead of desiccant and membrane
dryers (use after Grade 7 to reduce liquid and
solids load, prolong element life and ensure
filtration efficiency)
Afterfilter - downstream of refrigerated dryer
0.01
99.999+% of oil
100
aerosols
0.0008
aerosols
1
Afterfilter to Grade 3 & Grade 5 for true oil free
applications
0.01
Removes vapors
only
No liquid should be
present
0.003
vapor