Specifications

The responsibility of maintaining the quality of the air supply is yours. The air breathed by the person
wearing a Supplied Air Hood Respirator must be of a proper quality and quantity (sufficient volume or
flow rate) to satisfy all the respiratory needs of the wearer and to prevent any contaminated air from
entering under the face seal.
Government standards require that the air supplied to the respirator contain at least 19.5% oxygen by
volume. Unless safety and health codes in your area specify otherwise, the quality of the air must meet
the applicable minimum grade requirements for Type 1 gaseous air set forth in the Compressed Gas
Association Commodity Specification for Air, CGA G7.1 (Grade D or higher quality).
The air taken into a compressor for ultimate use in a Supplied-Air Hood Respirator must meet this
standard before and after compression. Use of low pressure, oil-less ambient air pumps must be located
in a contaminant-free area in order to deliver air to the respirator.
INLET AIR PRESSURE
To assure the volume of breathing air entering into the Supplied Air Respirator is within the prescribed
limits, it is necessary to consider the air pressure at the POA (Point of Attachment) and the length of the
supplied air hose. (see “Special User Instructions”)
Warning
ALLEGRO INDUSTRIES air hose is approved for use with this Supplied-Air Hood Respirator. Using
any other hose will automatically void the approval of the respirator and may be hazardous to the
wearer.
PUTTING ON (DONNING) THE RESPIRATOR
When properly worn, this Supplied Air Hood Respirator is attached to the wearer at two points. One is
around the waist by a belt which is attached to a breathing tube; the other is by the headband assembly
inside the hood assembly.
The assembled respirator should be put on in uncontaminated air, as follows:
1. Remove the headband assembly from the hood and adjust the headband to assure a snug but
comfortable fit.
2. Reinstall the headband assembly into the hood by lining up the Velcro® tabs.
3. Remove the protective tissue from the front of the hood’s lens.
4. Attach a removable lens cover (if required) to the outside of the lens to protect it from overspray.
5. Check to make sure that the breathing tube is not kinked or crushed and that it is fully inserted
into the collar of the hood assembly.
6. Secure the waist belt around your waist. Don the hood and headband assembly. Connect the
approved air supplied hose to the male connector plug on the end of the breathing tube.
7. Once connected to the air hose, turn on the air supply, check air flow, and enter the work area.