M-445, M-446, M-447, M-448 & M-449 Outer Shrouds (M-400 Series); M-444 Inner Shrouds (M-400 Series) - 3M Versaflo M Series User Instructions

M-445, M-446, M-447, M-448 & M-449 Outer Shrouds (M-400 Series)
To remove the outer shroud:
- Pull the large plastic tab off the air inlet of the headgear and release the suspension ratchet from the
hole in the outer shroud (Fig. 14a).
- Grasp the black shroud gasket and slowly pull straight out in small sections, working your way
around the shroud (Fig. 14b).
NOTE: Do not bend gasket over and 'peel' off as this may damage the gasket ribs. Do not start in the
middle of the gasket. Pull out in small sections starting at one end.
To install the outer shroud:
- Insert air inlet of headgear through the hole in the large plastic tab on the outer shroud. Push tab
fully onto the air inlet such that it is flush to the headgear shell. Push the ends of the plastic tab
underneath shell lip. Insert head suspension ratchet through hole in shroud (Fig. 14a).
- Grasp the black shroud gasket and pull to expose the edge of the gasket where it meets the
elastic (Fig. 14c). Align the edge of the gasket with the edge of the groove in the headgear. Press
the gasket firmly into the groove in small sections, working your way around the shroud. Start at
one end and work around in one direction. When you reach the end of the groove in the headgear
on the other side from where you started, the gasket on the shroud may extend slightly beyond
the edge of the groove - this is acceptable - but it is critical that both gasket ribs are completely
inserted into the groove.
Fig. 14a

M-444 Inner Shrouds (M-400 Series)

To remove inner shroud, unzip inner shroud from outer shroud and remove. To install inner shroud, align
the zipper parts on the inner and outer shroud and connect. Ensure inner shroud is completely zipped into
the outer shroud (Fig. 15).
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Fig. 13c
Fig. 14b
15
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Fig. 13d
Fig. 14c
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