Airflow into the facemask is controlled by
the DV, which is attached to the
facemask by a quick-fit connection. The
DV can be closed by a reset button to
enable the facemask to be removed
without loss of air to the atmosphere.
When the DV is next used the first breath
taken by the wearer opens the DV
automatically.
The bypass knob enables the wearer to
open an unregulated flow of air into the
facemask.
2.4 FACEMASKS
FLITE is approved for use with
PanaSeal, PanaVisor, Vision 3 and
Promask PP full facemasks.
All of which have the following features:
Conformance with EN 136 and
AS/NZS1716 : 2012.
Speech diaphragm.
Ori-nasal inner mask to minimise
the carbon dioxide dead space and
prevent visor misting.
Polycarbonate visor.
Fully adjustable, five-point web, or
net head harness options.
Left quick fit DV connector.
Reflex face seal.
PanaSeal is the standard facemask. It is
available in non-dermatitic silicone or
neoprene and may be fitted with a
microphone for a personal radio.
PanaVisor is similar to PanaSeal, but its
larger size makes it more suitable for
larger face sizes.
Vision 3 is available in non-dermatitic
silicone. It has a large visor, which
provides the wearer with a wider range of
vision.
Promask PP is moulded in hypo-
allergenic, black Procomp
TM
with a soft
silicone inner mask.
2.5 REDUCER/CYLINDER
VALVE
The reducer/cylinder valve is a combined
cylinder valve and pressure reducer.
When the handwheel is opened, air flows
from the cylinder, through the reducer to
the facemask demand valve.
The reducer is a spring and piston device
with an integral Pressure Relief Valve
(PRV) that protects the medium pressure
circuit from over-pressurisation.
The pressure gauge indicates the current
cylinder pressure.
2.6 CYLINDERS
When cylinders are provided they may
be:
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