G1 Regulator (Also Known As Demand Valve); G1 Heads-Up Display (Hud) - MSA G1 Operating Manual

2.2

G1 Regulator (also known as Demand Valve)

The mask mounted G1 Regulator is a pressure-demand regulator, which maintains a positive pres-
sure in the facepiece while the SCBA is in use. The positive pressure regulator reduces the pressure
coming from the pressure reducer further to provide breathable air to the user.
The regulator is connected to the facepiece with a fixed position Push-To-Connect (PTC) connection.
The regulator has two cover options available, purge and solid cover. The purge cover allows users
to activate the regulator manually or provide a quick burst of air during use without using the bypass
knob.
The regulator houses an electronic module which provides HUD functionality and microphone place-
ment. The microphones are activated when the regulator is connected to the facepiece and the user
begins breathing. Inhalation noise is not amplified by the system.
The hose for the regulator is available in two options, continuous or quick connect. The continuous
hose provides an uninterrupted connection from the pressure reducer to the regulator. A quick
connect coupling is positioned on the chest between the pressure reducer and regulator to enable
regulator removal from the SCBA for testing or repair. Both types of hoses for electronic versions have
integrated wiring and hoses.
2.3

G1 Heads-Up Display (HUD)

The HUD is integrated into the regulator and projects light into the facepiece. The HUD allows users
to see the cylinder pressure and alarm status while wearing the SCBA. The HUD receives the infor-
mation on the SCBA and power from the power module. The HUD consists of 7 LEDs which are sepa-
rated on the left and right sides to improve visibility and clarity. A light sensor in the regulator varies
the LED intensity depending on the ambient light condition (optional setting).
G1
Description
US
13