13
5. Maintenance
■
Maintenance schedule
Maintenance intervals highly depend on the mode of operation and the ambient
conditions on site, the intervals below air only to be understood as general recommendation
.
Period
Check point
Method
Start up
Pressure indication
All pressure gauges
- Drying tower pressure : same line pressure
- purge pressure : 3.0~3.5 barg
- Regeneration tower pressure : below 0.5barg
Solenoid & pneumatic valve
Operation check
Back pressure on
regeneration tower
Max. 0.5 bar. If needed clean the silencer.
Every 3~4
months
Pre-filters and after-filters
Inspect pre-filter and after filter for dirt, oil and
other contaminants. Replace if contaminated.
Control air filter
Inspect filter element or regulator.
if needed clean the filter & regulator.
Every 6
months
Calibrate dew point meter
(if installed)
Refer to dew point meter owner’s manual.
Inspect the silencer
Replace exhaust silencer if back pressure on
regeneration exceed 0.5 barg.
Inspect solenoid valves
While dryer is operating, inspect solenoid valves.
If leak or malfunction persists, replace valves.
Yearly
Replace filter elements
Replace pre-filters & after-filters.
Inspect & replace
pneumatic valves
Inspect valve seating and valve internals.
If needed, clean or replace the valve.
Inspect pressure gauge
Replace if readings are incorrect.
Every 2~3
year
Replace desiccant
(recommendation)
Replace if contaminated oil moisture and other
contaminants inhibit the performance of the
desiccant.
