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F. PARTICULATE FILTER SERVICE LIFE AND REPLACEMENT
The filter service life depends on the filter series type used, the user's breathing rate,
the characteristics of the contaminant and environmental conditions such as humidity.
All N-series should be replaced whenever they are damaged, soiled, contaminated with
water, or if they cause increased breathing resistance. DeVilbiss recommends, due to
considerations of hygiene, that all filters be replaced at least daily and more often if
necessary. Filters should also be replaced in accordance with schedules established by
regulatory agencies.
Failure to properly assemble filter pads to cartridges or filter
holders can cause leakage, which could lead to serious illness or
death.
1. Replace filters as follows:
a. Return to fresh air.
b. If using filter pads, remove the filter retainers from the cartridges or filter
holders. Remove the used filter pads and dispose of them in accordance with
Federal, state, and local guidelines. Clean the filter retainer, cartridge, or
holder if necessary. Install new replacement filters.
c. Perform a facepiece fit check as described in section C.
G. INSPECTION
Inspect the respirator before and after each use as described below and replace any
damaged component. See section H for repair instructions.
Do not use the respirator with damaged or improperly operating
valves.
1. Inspecting the respirator:
a. Inspect the facepiece skirt for cuts, gouges, punctures, tears, nicks, and
deterioration from age, heat, or contamination. Check the face seal area for
distortion.
b. Inspect the headbands for abrasions, cuts, nicks, loss of elasticity or
deterioration from age, heat, or contamination.
WARNING
WARNING
Service Bulletin
SB-25-062-A
11
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