49
Airline Connection Operation
G1 Industrial SCBA
US
12 Airline Connection Operation
The airline connection enables the respirator to be used as a combination self-contained-breathing-
apparatus and supplied-air-respirator. The airline connection includes a quick connect that attaches
to MSA approved air supply hoses.
When used as a combination respirator, the respirator shall be supplied with respirable air through an
air supply hose assembly with a minimum length of 9.5 inches and a maximum length of 300 feet
within a pressure range of 70-110 psig. A maximum of 12 sections of straight or six coiled air supply
hose may be used in making up the working length of hose. When using coiled hose, a maximum of
six sections may be used and each section is considered to be 50 feet long. Hose sections vary from
9.5 inches to 100 feet lengths. The airline connection to the apparatus is to be made through approved
quick connects only. The purity of the air supply is the responsibility of the user. The respirator is
approved only with supplied air meeting the requirements of the Compressed Gas Association Spec-
ification G-7 for quality verification level (grade) D air or equivalent specifications.
The airline connection is NOT to be used in the hose section length and quantity calculations.
See Approval Insert (P/N 10183896) for a listing of approved connections.
12.1 Preparation
The consecutive steps described below must be followed while donning of the apparatus and before
entering a toxic atmosphere:
(1) Ensure that combination type respirator is a NIOSH 42 CFR Part 84 approved configuration.
(2) Ensure the airline source is Quality Verification Grade D breathable air with inlet pressure
between 70 - 110 PSIG.
(3) Air supply hose must be between 9.5" and 300 feet in length and supplied by MSA.
(4) A maximum of twelve sections of air hose may be connected together to create the airline.
12.2 Use Of Combination Type Respirator, Airline Mode
(1) Don the apparatus as described in the Donning section.
(2) Turn on primary air source to pressurize the airline hose.
(3) Remove dust cap from airline connection.
