5. Maintenance
■
Pre-Filter
Under normal operating conditions, the pressure drop across the filter indicates when the
element needs changing typically 6 psig or greater. However, inspect the filter element at least
every three months for proper seating and condition of the element. If the element has collapsed
or can not be properly seated, replace the element.
■
After Filter
Under normal operating conditions, the pressure drop across the filter indicates when the
element needs changing typically 6 psig or greater. However, inspect the filter element at least
every three months for proper seating and condition of the element. If the element has collapsed
or cat be properly seated, replace the element.
Replacement of the element will enhance system operation and prevent inflow of desiccant
powder to load side.
■
Control air filter
The control air filter should be inspected periodically and replaced when dirty. Periodic
replacement of the element will ensure clean control air for operation of the valves.
■
Purge flow rate adjustment
The purge flow rate should be checked periodically for proper adjustment. The purge pressure
for full load operation should be set at 45 psig(3.1barg). The purge calibration graph(Appendix)
may be used for purge adjustment when the load is less than capacity.
11
Caution!
Before servicing any component, be certain the component is depressurized
and valves are closed. Otherwise, equipment damage, severe injury or death
could result.
Caution!
The life cycle of filter element depends of the quality of compressed air.
Periodic attention must be paid to proper performance.
