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Cleanable filters
Cleanable filters should be inspected and cleaned on a
regular basis, similar to the maintenance schedule used
for throwaway filters. The time interval between cleaning
is dependent upon the environment in which the unit is
operating and should be established based upon regular
inspection of the filter. Record the time interval in the
maintenance log for future reference. Unlike throwaway
filters, cleanable filters may be cleaned and reinstalled in the
unit instead of being disposed of when dirty. The cleanable
filters may be washed in hot, soapy water and then set aside
to dry before recharging and reinstalling.
Before replacing the filter, it should be recharged with some
type of entrapment film such as “Film-Car Recharging Oil.”
The filter should be sprayed on both sides or submerged
in the film to assure complete coverage. The filter should
not be soaked in the film but should be quickly dunked and
removed, allowing the excess to drain off the surface before
reinstalling in the unit.
Note: cleanable filters tend to have less air pressure drop
than throwaway filters.
Valves and piping
No formal maintenance is required on the valve package
components other than a visual inspection for possible
leaks during normal periodic unit maintenance. Strainers,
when included, should be checked regularly for build-up
and rinsed as needed. In the event that a valve should need
replacement, the same precautions taken during the initial
installation to protect the valve package from excessive heat
should be implemented during replacement.
Throwaway filters
These types of filters should be replaced on a regular basis.
The time interval between replacement is dependent upon
the environment in which the unit is operating and should
be set established based on regular inspection of the filter.
Record the time interval in the maintenance log for future
reference. Refer to the product catalog for the recommended
filter size. If the replacement filters are not purchased
from the factory, the same type and size filters should be
obtained. Pleated media or extended surface filters should
not be used without consent from the factory due to the high
air pressure drops associated with these types of filters,
negatively affecting unit performance.