DBA Essex PB&R Corporation
User Reference and Procedures Manual for the Essex Crewmember PBE
Document No: PRM-02, Revision: 9 Dated: 1/01/2012
break the tamper-evident seals.
(3) Breathing System
Once the pouch is removed from its container and opened, oxygen flow is initiated by
grasping one cylinder with one hand, and pulling the red ball with the other hand until it
is completely released from the PBE, which in turn activates the flashing green light on
the Service/End-of-Service Indicator. The red ball, pull cords, and release levers
should be discarded immediately upon activation. One bottle releases oxygen rapidly,
whereas the second bottle discharges oxygen slowly. An audible hissing sound and
inflation of the unit within (2) minutes indicates the PBE is operating properly.
Once donned, the Essex Crewmember PBE will protect the wearer for up to 15
minutes. Although both bottles will completely discharge in 8 to 10 minutes, enough
oxygen will remain for the full, specified 15 minutes of respiratory protection. When
the unit deflates to the point where it touches the wearer’s head and face, or when the
red light on the Service/End-of-Service Indicator flashes, the unit’s useful life has
ended and must be removed.
The Essex Crewmember PBE operates at a positive pressure. The neck seal acts as a
relief valve to prevent excessive pressure from building up inside the hood.
(4) Time Required to Put On and Take Off Hood
A trained user can access, and don the hood in approximately 15 seconds. It
can be removed in less than 5 seconds.
(5) Maneuverability During Use
The Essex Crewmember PBE does not restrict or interfere with normal body
movements. Even when fully inflated, it is compact enough that the wearer can pass
through openings as small as 18 x 18 in (460 mm x 460 mm).
(6) Carbon Dioxide Control
Special fabric panels inside the hood control carbon dioxide buildup. These panels
contain a dustless lithium hydroxide absorbent sealed inside a double walled membrane,
which keeps carbon dioxide concentrations at safe levels during the hood’s 15-minute
service period.
(7) Interpersonal Communications
Persons wearing the Essex Crewmember PBE can communicate by unaided voice with
other people wearing hoods, at a distance of at least 13.1 ft (4 m) away.
