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1 TECHNICAL DESCRIPTION
The S9 and S9 Incurve is a compressed air breathing apparatus for work in a
contaminated environment. The apparatus consists of:
• A harness assembly
• An air supply cylinder
• A face mask with breathing valve and by-pass including:
-A wireless Heads-Up Display (HUD) inside the face mask
• A regulator unit including:
-A Breathing apparatus computer (BAC)
-A Digital Display Unit (DDU)
-A Rapid Intervention Crew/Company Universal Air Connection System (RIC UAC)
-An integrated Personal Alert Safety System (PASS)
-Optional tracking senders
-Optional telemetry unit
• An extra air/rescue hose connection
The S9 and S9 Incurve self contained breathing apparatus (SCBA) uses clean dry air
compressed in a cylinder, carried on the back. The air is fed to a pressure regulator
which reduces the cylinder air pressure to a secondary pressure of approximately 110
psi. The air is then supplied to the face piece through the mask mounted breathing
valve.
The breathing valve is of the pressure-demand type that releases air on inhalation.
The S9 and S9 Incurve operates with positive pressure which keeps toxic gases from
leaking into the facepiece. Even if leakage was to occur, the positive pressure keeps
surrounding air out of the mask, although under such conditions duration of the air
supply may decrease.
A primary audible low air warning device placed at the pressure gauge / DDU is
located at the left shoulder in front of the user. A wireless Heads-Up Display (HUD)
installed inside the face mask acts as a visual pressure gauge and also provides a
secondary visual low air warning at both 1/2 and 1/3 cylinder pressure. The HUD
allows both the cylinder pressure and the visual low air warning to always be in the
wearer’s eld of vision. The HUD also includes a low battery indicator.
The apparatus is equipped with a Personal Alert Safety System (PASS) which is an
integrated PASS unit designed to meet the NFPA 1982 Standard on PASS for Fire
Fighters 2018 Edition. The PASS unit is integrated into the SCBA and is automatically
activated by air pressure from the SCBA. Tracking system and telemetry system can be
installed as an option.
1.1 HARNESS ASSEMBLY
The S9 incorporates a unique double pivoting padded harness assembly. The heavily
padded harness includes a rescue/carrying handle. Chest strap and a buddy
breathing hose pouch are optional features.
The harness can be adjusted for different body sizes by changing the distance
between the hip belt and the shoulder harness. The height adjustment can be made
with cylinder mounted on the SCBA.
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