O&M Manual v2
Page 18
5.3
Filters
All units come equipped with a standard filter set that includes a Particulate, Coalescing, and Absorbing filter
(
). Clean filter elements are vital for good system performance. The filters remove particulates as
well as liquid, water, and oil. The pre-filter (Particulate) removes particles down to 5 microns in size. It
should be changed every 12 months.
The coalescing filter removes particles down to 0.01 microns in size. The life of the coalescing filter is
dependent on how well the pre-filter performs its job; it will last for 12 months when the pre-filter is regularly
maintained.
The activated carbon tower and/or activated carbon filter element removes oil vapor down to about 0.003
ppm. The life of the activated carbon tower and/or activated carbon filter element is dependent on the oil
content in the feed air. An activated carbon tower will typically last for 12 months when the upstream filters
are regularly maintained.
See
, for illustration of how to remove typical filter bowl and replacing the filter element.
Figure 7: Filter Element Removal
**WARNING**
Do not try to remove filter bowls unless both the Air Supply gauge and the Process Pressure gauge
clearly read zero psig. Turn off the power and supply air. Relieve the system pressure by opening the
wedge valve after the regulator.
1.
Disconnect the tubes from the bottom of the bowls (if tied into condensate drain system).
2.
To remove the bowls, push the bowl latch down and rotate the bowl while pulling down.
3.
Inspect the bowls. If the drain system is working properly, the bowls should be empty.
4.
Replace any filter element that looks damaged or excessively dirty.
NOTE
A plugged drain system will cause water and oil to carry over into the adsorber, which will cause
permanent damage to the adsorbent. Such damage is not covered by the Manufacturer's Warranty.
Use of filters other than those specified by South-Tek Systems could result in damages not covered by
the warranty.
5.
Wash the bowls in soapy water and rinse thoroughly.
6.
Remove activated carbon tower and replace with new activated carbon.