MSA Duo-Flo, Instructions Manual

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user must switch the D/PD exhalation valve to the AIR-LINE position to use the res-
pirator in the air supplied mode of operation. When the air-line is disconnected or if
the air source is lost for any reason, the user must switch the D/PD exhalation valve
back to the FILTER/CANISTER position to again use the respirator in the air purify-
ing mode of operation.
Inhaled air enters the respirator either through the filter or canister or from the air-
line. The inhaled air passes over the facepiece lens, keeping it free from fog, before
it is taken into the lungs. Exhaled air leaves the facepiece through the exhalation
valve and consequently is not rebreathed. A check valve prevents the exhaled air
from passing out through the filter or canister.
Note: Training on the Pressure Demand Duo-Flo Respirator should include a brief
familiarization period where the employee is allowed to use the device in both
modes. This will allow the employee to recognize the higher breathing resistance
associated with the air-line position of the D/PD exhalation valve and allow him/her
to practice switching the valve from one position to the other.
Respirator Use Limitations
The wearer must comply with the following MSA respirator use limitations:
1. Maximum Use Concentration
Do not exceed ANY of the applicable maximum use concentrations listed
below:
4
TAL 7012 (L) Rev. 2 - 818369
RESPIRATOR RESPIRATORS WITH
TYPE ULTRA FILTER ® OR RESPIRATORS WITH
OPTIFILTER ® XL FILTER CARTRIDGES CANISTERS
RESPIRATOR
USE FULL FACEPIECE HALF MASK FULL FACEPIECE ONLY
Routine Use in Air-Supplied • 1,000 times • 10 times • 1,000 times Exposure
Mode Only - including entry, Exposure Limit Exposure Limit Limit (combined for all
continuous use and non- • IDLH • IDLH contaminants present)
emergency egress • IDLH (for any
contaminant present)
Gas/Vapor Contaminants
• Canister Escape Limit
Particulate Contaminants
• High Efficiency Filter:
1000 times Exposure
Limit
• Non-High Efficiency
Filter:
100 times Exposure Limit
Routine use in air-purifying • 100 times • 10 times • 100 times Exposure Limit
mode - including entry, Exposure Limit Exposure Limit • IDLH
continuous use, non- • IDLH • IDLH • Canister Escape Limit
emergency egress and/or
moving from station-to-station
Emergency Escape in Air- • Unlimited • Unlimited Gas/Vapor Contaminants
Purifying Mode • Canister Escape Limit
Particulate Contaminants
• Unlimited