MSA Duo-Flo, Instructions Manual

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FITTING THE MASK
Full Facepiece (All types)
Pull out headband straps, especially the “FRONT” or forehead strap, so that its end
is at the buckle, then grip facepiece between thumb and fingers, insert chin well into
the lower part of facepiece and pull headbands back over head. To obtain a firm
and comfortable fit against the face at all points, adjust the headbands as follows:
1. See that straps lie flat against head.
2. Tighten lower or “Neck” straps.
3. Tighten the “SIDE” straps. (Do not touch forehead or “FRONT” strap).
4. Place both hands on headband pad and push it towards the neck.
5. Repeat operations 2 and 3.
6. Tighten forehead or “FRONT” strap a few notches if necessary.
Half-Facepiece (Comfo only)
Fit facepiece on nose bridge making sure that you are able to breathe through nose.
Then swing bottom of facepiece into contact with the chin.
When using elastic or rubber headbands, position headbands with longest straps
above the ears and over the crown of the head, and headbands with shortest straps
below the ears and around nape of the neck. When using cradle headband, posi-
tion cradle headband around the crown of the head, and bottom headbands below
the ears and around the nape of the neck.
Then, adjust the straps for a comfortable fit by moving adjustment slides to length-
en or shorten straps. Adjust the straps just snug enough so that no air leaks around
the facepiece. It is not necessary to pull the straps so tight that the the respirator
digs into the face.
TEST FOR TIGHTNESS
The facepiece must be subjected to the following tightness test before each use.
With air-line disconnected, test the apparatus facepiece for tightness by holding the
hands tightly over the inlet(s) of the filter or canister. Inhale gently so that the face-
piece collapses slightly and hold the breath for ten seconds. The facepiece will
remain collapsed while the breath is held providing the assembly is gas tight. If any
leakage is detected around the facial seal, readjust head harness straps and repeat
test until there is no leakage. If other than facial seal leakage is detected, the con-
dition must be investigated and corrected before another test is made. The face-
piece must pass the tightness test before the user should attempt to enter any toxic
atmosphere.
REPLACING FILTER/CANISTER (Air-Purifying Configurations)
The length of time the P100 filter or canister will give protection depends on the
concentration of the contaminant and the rate of breathing while in the air-purifying
mode of operation. The N95 filter is effective for 8 hours of use (continuous or inter-
mittent). [Service time can be extended by performing an evaluation in the specific
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TAL 7012 (L) Rev. 2 - 818369